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Class Class<T>

java.lang.Object
- java.lang.Class<T>

Type Parameters:
T - the type of the class modeled by thisClass object. For example, the type ofString.class is Class<String>. UseClass<?> if the class being modeled is unknown.
All Implemented Interfaces:
Serializable,AnnotatedElement,GenericDeclaration,Type
```
public final classClass<T>extendsObjectimplementsSerializable,GenericDeclaration,Type,AnnotatedElement
```
Instances of the classClass represent classes and interfaces in a running Java application. An enum type is a kind of class and an annotation type is a kind of interface. Every array also belongs to a class that is reflected as aClass object that is shared by all arrays with the same element type and number of dimensions. The primitive Java types (boolean,byte,char,short,int,long,float, anddouble), and the keywordvoid are also represented asClass objects.
Class has no public constructor. Instead aClass object is constructed automatically by the Java Virtual Machine when a class loader invokes one of thedefineClass methods and passes the bytes of aclass file.
The methods of classClass expose many characteristics of a class or interface. Most characteristics are derived from theclass file that the class loader passed to the Java Virtual Machine. A few characteristics are determined by the class loading environment at run time, such as the module returned bygetModule().
Some methods of classClass expose whether the declaration of a class or interface in Java source code wasenclosed within another declaration. Other methods describe how a class or interface is situated in anest. Anest is a set of classes and interfaces, in the same run-time package, that allow mutual access to theirprivate members. The classes and interfaces are known asnestmates. One nestmate acts as thenest host, and enumerates the other nestmates which belong to the nest; each of them in turn records it as the nest host. The classes and interfaces which belong to a nest, including its host, are determined whenclass files are generated, for example, a Java compiler will typically record a top-level class as the host of a nest where the other members are the classes and interfaces whose declarations are enclosed within the top-level class declaration.
The following example uses aClass object to print the class name of an object:
```
     void printClassName(Object obj) {         System.out.println("The class of " + obj +                            " is " + obj.getClass().getName());     }
```
It is also possible to get theClass object for a named type (or for void) using a class literal. See Section 15.8.2 ofThe Java™ Language Specification. For example:
System.out.println("The name of class Foo is: "+Foo.class.getName());
Since:
1.0
See Also:
ClassLoader.defineClass(byte[], int, int),Serialized Form

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`<U> Class<? extends U>`	`asSubclass(Class<U> clazz)`	Casts this`Class` object to represent a subclass of the class represented by the specified class object.
`T`	`cast(Object obj)`	Casts an object to the class or interface represented by this`Class` object.
`boolean`	`desiredAssertionStatus()`	Returns the assertion status that would be assigned to this class if it were to be initialized at the time this method is invoked.
`staticClass<?>`	`forName(Module module,String name)`	Returns the`Class` with the given binary name in the given module.
`staticClass<?>`	`forName(String className)`	Returns the`Class` object associated with the class or interface with the given string name.
`staticClass<?>`	`forName(String name, boolean initialize,ClassLoader loader)`	Returns the`Class` object associated with the class or interface with the given string name, using the given class loader.
`AnnotatedType[]`	`getAnnotatedInterfaces()`	Returns an array of`AnnotatedType` objects that represent the use of types to specify superinterfaces of the entity represented by this`Class` object.
`AnnotatedType`	`getAnnotatedSuperclass()`	Returns an`AnnotatedType` object that represents the use of a type to specify the superclass of the entity represented by this `Class` object.
`<A extendsAnnotation> A`	`getAnnotation(Class<A> annotationClass)`	Returns this element's annotation for the specified type if such an annotation ispresent, else null.
`Annotation[]`	`getAnnotations()`	Returns annotations that arepresent on this element.
`<A extendsAnnotation> A[]`	`getAnnotationsByType(Class<A> annotationClass)`	Returns annotations that areassociated with this element.
`String`	`getCanonicalName()`	Returns the canonical name of the underlying class as defined by the Java Language Specification.
`Class<?>[]`	`getClasses()`	Returns an array containing`Class` objects representing all the public classes and interfaces that are members of the class represented by this`Class` object.
`ClassLoader`	`getClassLoader()`	Returns the class loader for the class.
`Class<?>`	`getComponentType()`	Returns the`Class` representing the component type of an array.
`Constructor<T>`	`getConstructor(Class<?>... parameterTypes)`	Returns a`Constructor` object that reflects the specified public constructor of the class represented by this`Class` object.
`Constructor<?>[]`	`getConstructors()`	Returns an array containing`Constructor` objects reflecting all the public constructors of the class represented by this`Class` object.
`<A extendsAnnotation> A`	`getDeclaredAnnotation(Class<A> annotationClass)`	Returns this element's annotation for the specified type if such an annotation isdirectly present, else null.
`Annotation[]`	`getDeclaredAnnotations()`	Returns annotations that aredirectly present on this element.
`<A extendsAnnotation> A[]`	`getDeclaredAnnotationsByType(Class<A> annotationClass)`	Returns this element's annotation(s) for the specified type if such annotations are eitherdirectly present orindirectly present.
`Class<?>[]`	`getDeclaredClasses()`	Returns an array of`Class` objects reflecting all the classes and interfaces declared as members of the class represented by this`Class` object.
`Constructor<T>`	`getDeclaredConstructor(Class<?>... parameterTypes)`	Returns a`Constructor` object that reflects the specified constructor of the class or interface represented by this`Class` object.
`Constructor<?>[]`	`getDeclaredConstructors()`	Returns an array of`Constructor` objects reflecting all the constructors declared by the class represented by this`Class` object.
`Field`	`getDeclaredField(String name)`	Returns a`Field` object that reflects the specified declared field of the class or interface represented by this`Class` object.
`Field[]`	`getDeclaredFields()`	Returns an array of`Field` objects reflecting all the fields declared by the class or interface represented by this`Class` object.
`Method`	`getDeclaredMethod(String name,Class<?>... parameterTypes)`	Returns a`Method` object that reflects the specified declared method of the class or interface represented by this`Class` object.
`Method[]`	`getDeclaredMethods()`	Returns an array containing`Method` objects reflecting all the declared methods of the class or interface represented by this `Class` object, including public, protected, default (package) access, and private methods, but excluding inherited methods.
`Class<?>`	`getDeclaringClass()`	If the class or interface represented by this`Class` object is a member of another class, returns the`Class` object representing the class in which it was declared.
`Class<?>`	`getEnclosingClass()`	Returns the immediately enclosing class of the underlying class.
`Constructor<?>`	`getEnclosingConstructor()`	If this`Class` object represents a local or anonymous class within a constructor, returns a`Constructor` object representing the immediately enclosing constructor of the underlying class.
`Method`	`getEnclosingMethod()`	If this`Class` object represents a local or anonymous class within a method, returns a`Method` object representing the immediately enclosing method of the underlying class.
`T[]`	`getEnumConstants()`	Returns the elements of this enum class or null if this Class object does not represent an enum type.
`Field`	`getField(String name)`	Returns a`Field` object that reflects the specified public member field of the class or interface represented by this`Class` object.
`Field[]`	`getFields()`	Returns an array containing`Field` objects reflecting all the accessible public fields of the class or interface represented by this`Class` object.
`Type[]`	`getGenericInterfaces()`	Returns the`Type`s representing the interfaces directly implemented by the class or interface represented by this object.
`Type`	`getGenericSuperclass()`	Returns the`Type` representing the direct superclass of the entity (class, interface, primitive type or void) represented by this`Class`.
`Class<?>[]`	`getInterfaces()`	Returns the interfaces directly implemented by the class or interface represented by this object.
`Method`	`getMethod(String name,Class<?>... parameterTypes)`	Returns a`Method` object that reflects the specified public member method of the class or interface represented by this`Class` object.
`Method[]`	`getMethods()`	Returns an array containing`Method` objects reflecting all the public methods of the class or interface represented by this `Class` object, including those declared by the class or interface and those inherited from superclasses and superinterfaces.
`int`	`getModifiers()`	Returns the Java language modifiers for this class or interface, encoded in an integer.
`Module`	`getModule()`	Returns the module that this class or interface is a member of.
`String`	`getName()`	Returns the name of the entity (class, interface, array class, primitive type, or void) represented by this`Class` object, as a`String`.
`Class<?>`	`getNestHost()`	Returns the nest host of thenest to which the class or interface represented by this`Class` object belongs.
`Class<?>[]`	`getNestMembers()`	Returns an array containing`Class` objects representing all the classes and interfaces that are members of the nest to which the class or interface represented by this`Class` object belongs.
`Package`	`getPackage()`	Gets the package of this class.
`String`	`getPackageName()`	Returns the fully qualified package name.
`ProtectionDomain`	`getProtectionDomain()`	Returns the`ProtectionDomain` of this class.
`URL`	`getResource(String name)`	Finds a resource with a given name.
`InputStream`	`getResourceAsStream(String name)`	Finds a resource with a given name.
`Object[]`	`getSigners()`	Gets the signers of this class.
`String`	`getSimpleName()`	Returns the simple name of the underlying class as given in the source code.
`Class<? superT>`	`getSuperclass()`	Returns the`Class` representing the direct superclass of the entity (class, interface, primitive type or void) represented by this`Class`.
`String`	`getTypeName()`	Return an informative string for the name of this type.
`TypeVariable<Class<T>>[]`	`getTypeParameters()`	Returns an array of`TypeVariable` objects that represent the type variables declared by the generic declaration represented by this`GenericDeclaration` object, in declaration order.
`boolean`	`isAnnotation()`	Returns true if this`Class` object represents an annotation type.
`boolean`	`isAnnotationPresent(Class<? extendsAnnotation> annotationClass)`	Returns true if an annotation for the specified type ispresent on this element, else false.
`boolean`	`isAnonymousClass()`	Returns`true` if and only if the underlying class is an anonymous class.
`boolean`	`isArray()`	Determines if this`Class` object represents an array class.
`boolean`	`isAssignableFrom(Class<?> cls)`	Determines if the class or interface represented by this`Class` object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified`Class` parameter.
`boolean`	`isEnum()`	Returns true if and only if this class was declared as an enum in the source code.
`boolean`	`isInstance(Object obj)`	Determines if the specified`Object` is assignment-compatible with the object represented by this`Class`.
`boolean`	`isInterface()`	Determines if the specified`Class` object represents an interface type.
`boolean`	`isLocalClass()`	Returns`true` if and only if the underlying class is a local class.
`boolean`	`isMemberClass()`	Returns`true` if and only if the underlying class is a member class.
`boolean`	`isNestmateOf(Class<?> c)`	Determines if the given`Class` is a nestmate of the class or interface represented by this`Class` object.
`boolean`	`isPrimitive()`	Determines if the specified`Class` object represents a primitive type.
`boolean`	`isSynthetic()`	Returns`true` if this class is a synthetic class; returns`false` otherwise.
`T`	`newInstance()`	Deprecated. This method propagates any exception thrown by the nullary constructor, including a checked exception.
`String`	`toGenericString()`	Returns a string describing this`Class`, including information about modifiers and type parameters.
`String`	`toString()`	Converts the object to a string.

Methods declared in class java.lang.Object
clone,equals,finalize,getClass,hashCode,notify,notifyAll,wait,wait,wait

- Method Detail
  - toString
```
public String toString()
```
    Converts the object to a string. The string representation is the string "class" or "interface", followed by a space, and then by the fully qualified name of the class in the format returned bygetName. If thisClass object represents a primitive type, this method returns the name of the primitive type. If thisClass object represents void this method returns "void". If thisClass object represents an array type, this method returns "class " followed bygetName.
    Overrides:
    toString in class Object
    Returns:
    a string representation of this class object.
  - toGenericString
```
public String toGenericString()
```
    Returns a string describing thisClass, including information about modifiers and type parameters. The string is formatted as a list of type modifiers, if any, followed by the kind of type (empty string for primitive types andclass,enum,interface, or@interface, as appropriate), followed by the type's name, followed by an angle-bracketed comma-separated list of the type's type parameters, if any. A space is used to separate modifiers from one another and to separate any modifiers from the kind of type. The modifiers occur in canonical order. If there are no type parameters, the type parameter list is elided. For an array type, the string starts with the type name, followed by an angle-bracketed comma-separated list of the type's type parameters, if any, followed by a sequence of[] characters, one set of brackets per dimension of the array.
    Note that since information about the runtime representation of a type is being generated, modifiers not present on the originating source code or illegal on the originating source code may be present.
    Returns:
    a string describing thisClass, including information about modifiers and type parameters
    Since:
    1.8
  - forName
```
public static Class<?> forName(String className)                        throwsClassNotFoundException
```
    Returns theClass object associated with the class or interface with the given string name. Invoking this method is equivalent to:
    Class.forName(className, true, currentLoader)
    wherecurrentLoader denotes the defining class loader of the current class.
    For example, the following code fragment returns the runtimeClass descriptor for the class namedjava.lang.Thread:
    Class t = Class.forName("java.lang.Thread")
    A call toforName("X") causes the class namedX to be initialized.
    Parameters:
    className - the fully qualified name of the desired class.
    Returns:
    theClass object for the class with the specified name.
    Throws:
    LinkageError - if the linkage fails
    ExceptionInInitializerError - if the initialization provoked by this method fails
    ClassNotFoundException - if the class cannot be located
  - forName
```
public static Class<?> forName(String name,                               boolean initialize,ClassLoader loader)                        throwsClassNotFoundException
```
    Returns theClass object associated with the class or interface with the given string name, using the given class loader. Given the fully qualified name for a class or interface (in the same format returned bygetName) this method attempts to locate, load, and link the class or interface. The specified class loader is used to load the class or interface. If the parameterloader is null, the class is loaded through the bootstrap class loader. The class is initialized only if theinitialize parameter istrue and if it has not been initialized earlier.
    Ifname denotes a primitive type or void, an attempt will be made to locate a user-defined class in the unnamed package whose name isname. Therefore, this method cannot be used to obtain any of theClass objects representing primitive types or void.
    Ifname denotes an array class, the component type of the array class is loaded but not initialized.
    For example, in an instance method the expression:
    Class.forName("Foo")
    is equivalent to:
    Class.forName("Foo", true, this.getClass().getClassLoader())
    Note that this method throws errors related to loading, linking or initializing as specified in Sections 12.2, 12.3 and 12.4 ofThe Java Language Specification. Note that this method does not check whether the requested class is accessible to its caller.
    Parameters:
    name - fully qualified name of the desired class
    initialize - iftrue the class will be initialized. See Section 12.4 ofThe Java Language Specification.
    loader - class loader from which the class must be loaded
    Returns:
    class object representing the desired class
    Throws:
    LinkageError - if the linkage fails
    ExceptionInInitializerError - if the initialization provoked by this method fails
    ClassNotFoundException - if the class cannot be located by the specified class loader
    SecurityException - if a security manager is present, and theloader isnull, and the caller's class loader is notnull, and the caller does not have theRuntimePermission("getClassLoader")
    Since:
    1.2
    See Also:
    forName(String),ClassLoader
  - forName
```
public static Class<?> forName(Module module,String name)
```
    Returns theClass with the given binary name in the given module.
    This method attempts to locate, load, and link the class or interface. It does not run the class initializer. If the class is not found, this method returnsnull.
    If the class loader of the given module defines other modules and the given name is a class defined in a different module, this method returnsnull after the class is loaded.
    This method does not check whether the requested class is accessible to its caller.
    API Note:
    This method returnsnull on failure rather than throwing aClassNotFoundException, as is done by theforName(String, boolean, ClassLoader) method. The security check is a stack-based permission check if the caller loads a class in another module.
    Parameters:
    module - A module
    name - Thebinary name of the class
    Returns:
    Class object of the given name defined in the given module;null if not found.
    Throws:
    NullPointerException - if the given module or name isnull
    LinkageError - if the linkage fails
    SecurityException -
    if the caller is not the specified module andRuntimePermission("getClassLoader") permission is denied; or
    access to the module content is denied. For example, permission check will be performed when a class loader callsModuleReader.open(String) to read the bytes of a class file in a module.
    Since:
    9
  - newInstance
```
@Deprecated(since="9")public T newInstance()              throwsInstantiationException,IllegalAccessException
```
    Deprecated.
    This method propagates any exception thrown by the nullary constructor, including a checked exception. Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler. TheConstructor.newInstance method avoids this problem by wrapping any exception thrown by the constructor in a (checked)InvocationTargetException.
    The call
    clazz.newInstance()
    can be replaced by
    clazz.getDeclaredConstructor().newInstance()
    The latter sequence of calls is inferred to be able to throw the additional exception typesInvocationTargetException andNoSuchMethodException. Both of these exception types are subclasses ofReflectiveOperationException.
    Creates a new instance of the class represented by thisClass object. The class is instantiated as if by anew expression with an empty argument list. The class is initialized if it has not already been initialized.
    Returns:
    a newly allocated instance of the class represented by this object.
    Throws:
    IllegalAccessException - if the class or its nullary constructor is not accessible.
    InstantiationException - if thisClass represents an abstract class, an interface, an array class, a primitive type, or void; or if the class has no nullary constructor; or if the instantiation fails for some other reason.
    ExceptionInInitializerError - if the initialization provoked by this method fails.
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
  - isInstance
```
public boolean isInstance(Object obj)
```
    Determines if the specifiedObject is assignment-compatible with the object represented by thisClass. This method is the dynamic equivalent of the Java languageinstanceof operator. The method returnstrue if the specifiedObject argument is non-null and can be cast to the reference type represented by thisClass object without raising aClassCastException. It returnsfalse otherwise.
    Specifically, if thisClass object represents a declared class, this method returnstrue if the specifiedObject argument is an instance of the represented class (or of any of its subclasses); it returnsfalse otherwise. If thisClass object represents an array class, this method returnstrue if the specifiedObject argument can be converted to an object of the array class by an identity conversion or by a widening reference conversion; it returnsfalse otherwise. If thisClass object represents an interface, this method returnstrue if the class or any superclass of the specifiedObject argument implements this interface; it returnsfalse otherwise. If thisClass object represents a primitive type, this method returnsfalse.
    Parameters:
    obj - the object to check
    Returns:
    true ifobj is an instance of this class
    Since:
    1.1
  - isAssignableFrom
```
public boolean isAssignableFrom(Class<?> cls)
```
    Determines if the class or interface represented by thisClass object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specifiedClass parameter. It returnstrue if so; otherwise it returnsfalse. If thisClass object represents a primitive type, this method returnstrue if the specifiedClass parameter is exactly thisClass object; otherwise it returnsfalse.
    Specifically, this method tests whether the type represented by the specifiedClass parameter can be converted to the type represented by thisClass object via an identity conversion or via a widening reference conversion. SeeThe Java Language Specification, sections 5.1.1 and 5.1.4 , for details.
    Parameters:
    cls - theClass object to be checked
    Returns:
    theboolean value indicating whether objects of the typecls can be assigned to objects of this class
    Throws:
    NullPointerException - if the specified Class parameter is null.
    Since:
    1.1
  - isInterface
```
public boolean isInterface()
```
    Determines if the specifiedClass object represents an interface type.
    Returns:
    true if this object represents an interface;false otherwise.
  - isArray
```
public boolean isArray()
```
    Determines if thisClass object represents an array class.
    Returns:
    true if this object represents an array class;false otherwise.
    Since:
    1.1
  - isPrimitive
```
public boolean isPrimitive()
```
    Determines if the specifiedClass object represents a primitive type.
    There are nine predefinedClass objects to represent the eight primitive types and void. These are created by the Java Virtual Machine, and have the same names as the primitive types that they represent, namelyboolean,byte,char,short,int,long,float, anddouble.
    These objects may only be accessed via the following public static final variables, and are the onlyClass objects for which this method returnstrue.
    Returns:
    true if and only if this class represents a primitive type
    Since:
    1.1
    See Also:
    Boolean.TYPE,Character.TYPE,Byte.TYPE,Short.TYPE,Integer.TYPE,Long.TYPE,Float.TYPE,Double.TYPE,Void.TYPE
  - isAnnotation
```
public boolean isAnnotation()
```
    Returns true if thisClass object represents an annotation type. Note that if this method returns true,isInterface() would also return true, as all annotation types are also interfaces.
    Returns:
    true if this class object represents an annotation type;false otherwise
    Since:
    1.5
  - isSynthetic
```
public boolean isSynthetic()
```
    Returnstrue if this class is a synthetic class; returnsfalse otherwise.
    Returns:
    true if and only if this class is a synthetic class as defined by the Java Language Specification.
    Since:
    1.5
    SeeThe Java™ Language Specification:
    13.1 The Form of a Binary
  - getName
```
public String getName()
```
    Returns the name of the entity (class, interface, array class, primitive type, or void) represented by thisClass object, as aString.
    If this class object represents a reference type that is not an array type then the binary name of the class is returned, as specified byThe Java™ Language Specification.
    If this class object represents a primitive type or void, then the name returned is aString equal to the Java language keyword corresponding to the primitive type or void.
    If this class object represents a class of arrays, then the internal form of the name consists of the name of the element type preceded by one or more '[' characters representing the depth of the array nesting. The encoding of element type names is as follows:
    Element types and encodings
    Element Type Encoding
    boolean Z
    byte B
    char C
    class or interface Lclassname;
    double D
    float F
    int I
    long J
    short S
    The class or interface nameclassname is the binary name of the class specified above.
    Examples:
    String.class.getName() returns "java.lang.String" byte.class.getName() returns "byte" (new Object[3]).getClass().getName() returns "[Ljava.lang.Object;" (new int[3][4][5][6][7][8][9]).getClass().getName() returns "[[[[[[[I"
    Returns:
    the name of the class or interface represented by this object.
  - getClassLoader
```
public ClassLoader getClassLoader()
```
    Returns the class loader for the class. Some implementations may use null to represent the bootstrap class loader. This method will return null in such implementations if this class was loaded by the bootstrap class loader.
    If this object represents a primitive type or void, null is returned.
    Returns:
    the class loader that loaded the class or interface represented by this object.
    Throws:
    SecurityException - if a security manager is present, and the caller's class loader is notnull and is not the same as or an ancestor of the class loader for the class whose class loader is requested, and the caller does not have theRuntimePermission("getClassLoader")
    See Also:
    ClassLoader,SecurityManager.checkPermission(java.security.Permission),RuntimePermission
  - getModule
```
public Module getModule()
```
    Returns the module that this class or interface is a member of. If this class represents an array type then this method returns theModule for the element type. If this class represents a primitive type or void, then theModule object for thejava.base module is returned. If this class is in an unnamed module then theunnamedModule of the class loader for this class is returned.
    Returns:
    the module that this class or interface is a member of
    Since:
    9
  - getTypeParameters
```
public TypeVariable<Class<T>>[] getTypeParameters()
```
    Returns an array ofTypeVariable objects that represent the type variables declared by the generic declaration represented by thisGenericDeclaration object, in declaration order. Returns an array of length 0 if the underlying generic declaration declares no type variables.
    Specified by:
    getTypeParameters in interface GenericDeclaration
    Returns:
    an array ofTypeVariable objects that represent the type variables declared by this generic declaration
    Throws:
    GenericSignatureFormatError - if the generic signature of this generic declaration does not conform to the format specified inThe Java™ Virtual Machine Specification
    Since:
    1.5
  - getSuperclass
```
public Class<? superT> getSuperclass()
```
    Returns theClass representing the direct superclass of the entity (class, interface, primitive type or void) represented by thisClass. If thisClass represents either theObject class, an interface, a primitive type, or void, then null is returned. If this object represents an array class then theClass object representing theObject class is returned.
    Returns:
    the direct superclass of the class represented by this object
  - getGenericSuperclass
```
public Type getGenericSuperclass()
```
    Returns theType representing the direct superclass of the entity (class, interface, primitive type or void) represented by thisClass.
    If the superclass is a parameterized type, theType object returned must accurately reflect the actual type parameters used in the source code. The parameterized type representing the superclass is created if it had not been created before. See the declaration ofParameterizedType for the semantics of the creation process for parameterized types. If thisClass represents either theObject class, an interface, a primitive type, or void, then null is returned. If this object represents an array class then theClass object representing theObject class is returned.
    Returns:
    the direct superclass of the class represented by this object
    Throws:
    GenericSignatureFormatError - if the generic class signature does not conform to the format specified inThe Java™ Virtual Machine Specification
    TypeNotPresentException - if the generic superclass refers to a non-existent type declaration
    MalformedParameterizedTypeException - if the generic superclass refers to a parameterized type that cannot be instantiated for any reason
    Since:
    1.5
  - getPackage
```
public Package getPackage()
```
    Gets the package of this class.
    If this class represents an array type, a primitive type or void, this method returnsnull.
    Returns:
    the package of this class.
  - getPackageName
```
public String getPackageName()
```
    Returns the fully qualified package name.
    If this class is a top level class, then this method returns the fully qualified name of the package that the class is a member of, or the empty string if the class is in an unnamed package.
    If this class is a member class, then this method is equivalent to invokinggetPackageName() on theenclosing class.
    If this class is alocal class or ananonymous class, then this method is equivalent to invokinggetPackageName() on thedeclaring class of theenclosing method orenclosing constructor.
    If this class represents an array type then this method returns the package name of the element type. If this class represents a primitive type or void then the package name "java.lang" is returned.
    Returns:
    the fully qualified package name
    Since:
    9
    SeeThe Java™ Language Specification:
    6.7 Fully Qualified Names
  - getInterfaces
```
public Class<?>[] getInterfaces()
```
    Returns the interfaces directly implemented by the class or interface represented by this object.
    If this object represents a class, the return value is an array containing objects representing all interfaces directly implemented by the class. The order of the interface objects in the array corresponds to the order of the interface names in theimplements clause of the declaration of the class represented by this object. For example, given the declaration:
    class Shimmer implements FloorWax, DessertTopping { ... }
    suppose the value ofs is an instance ofShimmer; the value of the expression:
    s.getClass().getInterfaces()[0]
    is theClass object that represents interfaceFloorWax; and the value of:
    s.getClass().getInterfaces()[1]
    is theClass object that represents interfaceDessertTopping.
    If this object represents an interface, the array contains objects representing all interfaces directly extended by the interface. The order of the interface objects in the array corresponds to the order of the interface names in theextends clause of the declaration of the interface represented by this object.
    If this object represents a class or interface that implements no interfaces, the method returns an array of length 0.
    If this object represents a primitive type or void, the method returns an array of length 0.
    If thisClass object represents an array type, the interfacesCloneable andjava.io.Serializable are returned in that order.
    Returns:
    an array of interfaces directly implemented by this class
  - getGenericInterfaces
```
public Type[] getGenericInterfaces()
```
    Returns theTypes representing the interfaces directly implemented by the class or interface represented by this object.
    If a superinterface is a parameterized type, theType object returned for it must accurately reflect the actual type parameters used in the source code. The parameterized type representing each superinterface is created if it had not been created before. See the declaration ofParameterizedType for the semantics of the creation process for parameterized types.
    If this object represents a class, the return value is an array containing objects representing all interfaces directly implemented by the class. The order of the interface objects in the array corresponds to the order of the interface names in theimplements clause of the declaration of the class represented by this object.
    If this object represents an interface, the array contains objects representing all interfaces directly extended by the interface. The order of the interface objects in the array corresponds to the order of the interface names in theextends clause of the declaration of the interface represented by this object.
    If this object represents a class or interface that implements no interfaces, the method returns an array of length 0.
    If this object represents a primitive type or void, the method returns an array of length 0.
    If thisClass object represents an array type, the interfacesCloneable andjava.io.Serializable are returned in that order.
    Returns:
    an array of interfaces directly implemented by this class
    Throws:
    GenericSignatureFormatError - if the generic class signature does not conform to the format specified inThe Java™ Virtual Machine Specification
    TypeNotPresentException - if any of the generic superinterfaces refers to a non-existent type declaration
    MalformedParameterizedTypeException - if any of the generic superinterfaces refer to a parameterized type that cannot be instantiated for any reason
    Since:
    1.5
  - getComponentType
```
public Class<?> getComponentType()
```
    Returns theClass representing the component type of an array. If this class does not represent an array class this method returns null.
    Returns:
    theClass representing the component type of this class if this class is an array
    Since:
    1.1
    See Also:
    Array
  - getModifiers
```
public int getModifiers()
```
    Returns the Java language modifiers for this class or interface, encoded in an integer. The modifiers consist of the Java Virtual Machine's constants forpublic,protected,private,final,static,abstract andinterface; they should be decoded using the methods of classModifier.
    If the underlying class is an array class, then itspublic,private andprotected modifiers are the same as those of its component type. If thisClass represents a primitive type or void, itspublic modifier is alwaystrue, and itsprotected andprivate modifiers are alwaysfalse. If this object represents an array class, a primitive type or void, then itsfinal modifier is alwaystrue and its interface modifier is alwaysfalse. The values of its other modifiers are not determined by this specification.
    The modifier encodings are defined inThe Java Virtual Machine Specification, table 4.1.
    Returns:
    theint representing the modifiers for this class
    Since:
    1.1
    See Also:
    Modifier
  - getSigners
```
public Object[] getSigners()
```
    Gets the signers of this class.
    Returns:
    the signers of this class, or null if there are no signers. In particular, this method returns null if this object represents a primitive type or void.
    Since:
    1.1
  - getEnclosingMethod
```
public Method getEnclosingMethod()                          throwsSecurityException
```
    If thisClass object represents a local or anonymous class within a method, returns aMethod object representing the immediately enclosing method of the underlying class. Returnsnull otherwise. In particular, this method returnsnull if the underlying class is a local or anonymous class immediately enclosed by a type declaration, instance initializer or static initializer.
    Returns:
    the immediately enclosing method of the underlying class, if that class is a local or anonymous class; otherwisenull.
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of the enclosing class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the methods within the enclosing class
    the caller's class loader is not the same as or an ancestor of the class loader for the enclosing class and invocation ofs.checkPackageAccess() denies access to the package of the enclosing class
    Since:
    1.5
  - getEnclosingConstructor
```
public Constructor<?> getEnclosingConstructor()                                       throwsSecurityException
```
    If thisClass object represents a local or anonymous class within a constructor, returns aConstructor object representing the immediately enclosing constructor of the underlying class. Returnsnull otherwise. In particular, this method returnsnull if the underlying class is a local or anonymous class immediately enclosed by a type declaration, instance initializer or static initializer.
    Returns:
    the immediately enclosing constructor of the underlying class, if that class is a local or anonymous class; otherwisenull.
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of the enclosing class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the constructors within the enclosing class
    the caller's class loader is not the same as or an ancestor of the class loader for the enclosing class and invocation ofs.checkPackageAccess() denies access to the package of the enclosing class
    Since:
    1.5
  - getDeclaringClass
```
public Class<?> getDeclaringClass()                           throwsSecurityException
```
    If the class or interface represented by thisClass object is a member of another class, returns theClass object representing the class in which it was declared. This method returns null if this class or interface is not a member of any other class. If thisClass object represents an array class, a primitive type, or void,then this method returns null.
    Returns:
    the declaring class for this class
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the declaring class and invocation ofs.checkPackageAccess() denies access to the package of the declaring class
    Since:
    1.1
  - getEnclosingClass
```
public Class<?> getEnclosingClass()                           throwsSecurityException
```
    Returns the immediately enclosing class of the underlying class. If the underlying class is a top level class this method returnsnull.
    Returns:
    the immediately enclosing class of the underlying class
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the enclosing class and invocation ofs.checkPackageAccess() denies access to the package of the enclosing class
    Since:
    1.5
  - getSimpleName
```
public String getSimpleName()
```
    Returns the simple name of the underlying class as given in the source code. Returns an empty string if the underlying class is anonymous.
    The simple name of an array is the simple name of the component type with "[]" appended. In particular the simple name of an array whose component type is anonymous is "[]".
    Returns:
    the simple name of the underlying class
    Since:
    1.5
  - getTypeName
```
public String getTypeName()
```
    Return an informative string for the name of this type.
    Specified by:
    getTypeName in interface Type
    Returns:
    an informative string for the name of this type
    Since:
    1.8
  - getCanonicalName
```
public String getCanonicalName()
```
    Returns the canonical name of the underlying class as defined by the Java Language Specification. Returns null if the underlying class does not have a canonical name (i.e., if it is a local or anonymous class or an array whose component type does not have a canonical name).
    Returns:
    the canonical name of the underlying class if it exists, andnull otherwise.
    Since:
    1.5
  - isAnonymousClass
```
public boolean isAnonymousClass()
```
    Returnstrue if and only if the underlying class is an anonymous class.
    Returns:
    true if and only if this class is an anonymous class.
    Since:
    1.5
  - isLocalClass
```
public boolean isLocalClass()
```
    Returnstrue if and only if the underlying class is a local class.
    Returns:
    true if and only if this class is a local class.
    Since:
    1.5
  - isMemberClass
```
public boolean isMemberClass()
```
    Returnstrue if and only if the underlying class is a member class.
    Returns:
    true if and only if this class is a member class.
    Since:
    1.5
  - getClasses
```
public Class<?>[] getClasses()
```
    Returns an array containingClass objects representing all the public classes and interfaces that are members of the class represented by thisClass object. This includes public class and interface members inherited from superclasses and public class and interface members declared by the class. This method returns an array of length 0 if thisClass object has no public member classes or interfaces. This method also returns an array of length 0 if thisClass object represents a primitive type, an array class, or void.
    Returns:
    the array ofClass objects representing the public members of this class
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
  - getFields
```
public Field[] getFields()                  throwsSecurityException
```
    Returns an array containingField objects reflecting all the accessible public fields of the class or interface represented by thisClass object.
    If thisClass object represents a class or interface with no accessible public fields, then this method returns an array of length 0.
    If thisClass object represents a class, then this method returns the public fields of the class and of all its superclasses and superinterfaces.
    If thisClass object represents an interface, then this method returns the fields of the interface and of all its superinterfaces.
    If thisClass object represents an array type, a primitive type, or void, then this method returns an array of length 0.
    The elements in the returned array are not sorted and are not in any particular order.
    Returns:
    the array ofField objects representing the public fields
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.3 Field Declarations
  - getMethods
```
public Method[] getMethods()                    throwsSecurityException
```
    Returns an array containingMethod objects reflecting all the public methods of the class or interface represented by this Class object, including those declared by the class or interface and those inherited from superclasses and superinterfaces.
    If thisClass object represents an array type, then the returned array has aMethod object for each of the public methods inherited by the array type fromObject. It does not contain aMethod object forclone().
    If thisClass object represents an interface then the returned array does not contain any implicitly declared methods fromObject. Therefore, if no methods are explicitly declared in this interface or any of its superinterfaces then the returned array has length 0. (Note that aClass object which represents a class always has public methods, inherited fromObject.)
    The returned array never contains methods with names "<init>" or "<clinit>".
    The elements in the returned array are not sorted and are not in any particular order.
    Generally, the result is computed as with the following 4 step algorithm. Let C be the class or interface represented by thisClass object:
    A union of methods is composed of:
    C's declared public instance and static methods as returned bygetDeclaredMethods() and filtered to include only public methods.
    If C is a class other thanObject, then include the result of invoking this algorithm recursively on the superclass of C.
    Include the results of invoking this algorithm recursively on all direct superinterfaces of C, but include only instance methods.
    Union from step 1 is partitioned into subsets of methods with same signature (name, parameter types) and return type.
    Within each such subset only the most specific methods are selected. Let method M be a method from a set of methods with same signature and return type. M is most specific if there is no such method N != M from the same set, such that N is more specific than M. N is more specific than M if:
    N is declared by a class and M is declared by an interface; or
    N and M are both declared by classes or both by interfaces and N's declaring type is the same as or a subtype of M's declaring type (clearly, if M's and N's declaring types are the same type, then M and N are the same method).
    The result of this algorithm is the union of all selected methods from step 3.
    API Note:
    There may be more than one method with a particular name and parameter types in a class because while the Java language forbids a class to declare multiple methods with the same signature but different return types, the Java virtual machine does not. This increased flexibility in the virtual machine can be used to implement various language features. For example, covariant returns can be implemented withbridge methods; the bridge method and the overriding method would have the same signature but different return types.
    Returns:
    the array ofMethod objects representing the public methods of this class
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.4 Method Declarations
  - getConstructors
```
public Constructor<?>[] getConstructors()                                 throwsSecurityException
```
    Returns an array containingConstructor objects reflecting all the public constructors of the class represented by thisClass object. An array of length 0 is returned if the class has no public constructors, or if the class is an array class, or if the class reflects a primitive type or void. Note that while this method returns an array of Constructor<T> objects (that is an array of constructors from this class), the return type of this method is Constructor<?>[] andnotConstructor<T>[] as might be expected. This less informative return type is necessary since after being returned from this method, the array could be modified to holdConstructor objects for different classes, which would violate the type guarantees ofConstructor<T>[].
    Returns:
    the array ofConstructor objects representing the public constructors of this class
    Throws:
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
  - getField
```
public Field getField(String name)               throwsNoSuchFieldException,SecurityException
```
    Returns aField object that reflects the specified public member field of the class or interface represented by thisClass object. Thename parameter is aString specifying the simple name of the desired field.
    The field to be reflected is determined by the algorithm that follows. Let C be the class or interface represented by this object:
    If C declares a public field with the name specified, that is the field to be reflected.
    If no field was found in step 1 above, this algorithm is applied recursively to each direct superinterface of C. The direct superinterfaces are searched in the order they were declared.
    If no field was found in steps 1 and 2 above, and C has a superclass S, then this algorithm is invoked recursively upon S. If C has no superclass, then aNoSuchFieldException is thrown.
    If thisClass object represents an array type, then this method does not find thelength field of the array type.
    Parameters:
    name - the field name
    Returns:
    theField object of this class specified byname
    Throws:
    NoSuchFieldException - if a field with the specified name is not found.
    NullPointerException - ifname isnull
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.3 Field Declarations
  - getMethod
```
public Method getMethod(String name,Class<?>... parameterTypes)                 throwsNoSuchMethodException,SecurityException
```
    Returns aMethod object that reflects the specified public member method of the class or interface represented by thisClass object. Thename parameter is aString specifying the simple name of the desired method. TheparameterTypes parameter is an array ofClass objects that identify the method's formal parameter types, in declared order. IfparameterTypes isnull, it is treated as if it were an empty array.
    If thisClass object represents an array type, then this method finds any public method inherited by the array type fromObject except methodclone().
    If thisClass object represents an interface then this method does not find any implicitly declared method fromObject. Therefore, if no methods are explicitly declared in this interface or any of its superinterfaces, then this method does not find any method.
    This method does not find any method with name "<init>" or "<clinit>".
    Generally, the method to be reflected is determined by the 4 step algorithm that follows. Let C be the class or interface represented by thisClass object:
    A union of methods is composed of:
    C's declared public instance and static methods as returned bygetDeclaredMethods() and filtered to include only public methods that match givenname andparameterTypes
    If C is a class other thanObject, then include the result of invoking this algorithm recursively on the superclass of C.
    Include the results of invoking this algorithm recursively on all direct superinterfaces of C, but include only instance methods.
    This union is partitioned into subsets of methods with same return type (the selection of methods from step 1 also guarantees that they have the same method name and parameter types).
    Within each such subset only the most specific methods are selected. Let method M be a method from a set of methods with same VM signature (return type, name, parameter types). M is most specific if there is no such method N != M from the same set, such that N is more specific than M. N is more specific than M if:
    N is declared by a class and M is declared by an interface; or
    N and M are both declared by classes or both by interfaces and N's declaring type is the same as or a subtype of M's declaring type (clearly, if M's and N's declaring types are the same type, then M and N are the same method).
    The result of this algorithm is chosen arbitrarily from the methods with most specific return type among all selected methods from step 3. Let R be a return type of a method M from the set of all selected methods from step 3. M is a method with most specific return type if there is no such method N != M from the same set, having return type S != R, such that S is a subtype of R as determined by R.class.isAssignableFrom(java.lang.Class<?>)(S.class).
    API Note:
    There may be more than one method with matching name and parameter types in a class because while the Java language forbids a class to declare multiple methods with the same signature but different return types, the Java virtual machine does not. This increased flexibility in the virtual machine can be used to implement various language features. For example, covariant returns can be implemented withbridge methods; the bridge method and the overriding method would have the same signature but different return types. This method would return the overriding method as it would have a more specific return type.
    Parameters:
    name - the name of the method
    parameterTypes - the list of parameters
    Returns:
    theMethod object that matches the specifiedname andparameterTypes
    Throws:
    NoSuchMethodException - if a matching method is not found or if the name is "<init>"or "<clinit>".
    NullPointerException - ifname isnull
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.4 Method Declarations
  - getConstructor
```
public Constructor<T> getConstructor(Class<?>... parameterTypes)                              throwsNoSuchMethodException,SecurityException
```
    Returns aConstructor object that reflects the specified public constructor of the class represented by thisClass object. TheparameterTypes parameter is an array ofClass objects that identify the constructor's formal parameter types, in declared order. If thisClass object represents an inner class declared in a non-static context, the formal parameter types include the explicit enclosing instance as the first parameter.
    The constructor to reflect is the public constructor of the class represented by thisClass object whose formal parameter types match those specified byparameterTypes.
    Parameters:
    parameterTypes - the parameter array
    Returns:
    theConstructor object of the public constructor that matches the specifiedparameterTypes
    Throws:
    NoSuchMethodException - if a matching method is not found.
    SecurityException - If a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class.
    Since:
    1.1
  - getDeclaredClasses
```
public Class<?>[] getDeclaredClasses()                              throwsSecurityException
```
    Returns an array ofClass objects reflecting all the classes and interfaces declared as members of the class represented by thisClass object. This includes public, protected, default (package) access, and private classes and interfaces declared by the class, but excludes inherited classes and interfaces. This method returns an array of length 0 if the class declares no classes or interfaces as members, or if thisClass object represents a primitive type, an array class, or void.
    Returns:
    the array ofClass objects representing all the declared members of this class
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared classes within this class
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
  - getDeclaredFields
```
public Field[] getDeclaredFields()                          throwsSecurityException
```
    Returns an array ofField objects reflecting all the fields declared by the class or interface represented by thisClass object. This includes public, protected, default (package) access, and private fields, but excludes inherited fields.
    If thisClass object represents a class or interface with no declared fields, then this method returns an array of length 0.
    If thisClass object represents an array type, a primitive type, or void, then this method returns an array of length 0.
    The elements in the returned array are not sorted and are not in any particular order.
    Returns:
    the array ofField objects representing all the declared fields of this class
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared fields within this class
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.3 Field Declarations
  - getDeclaredMethods
```
public Method[] getDeclaredMethods()                            throwsSecurityException
```
    Returns an array containingMethod objects reflecting all the declared methods of the class or interface represented by this Class object, including public, protected, default (package) access, and private methods, but excluding inherited methods.
    If thisClass object represents a type that has multiple declared methods with the same name and parameter types, but different return types, then the returned array has aMethod object for each such method.
    If thisClass object represents a type that has a class initialization method<clinit>, then the returned array doesnot have a correspondingMethod object.
    If thisClass object represents a class or interface with no declared methods, then the returned array has length 0.
    If thisClass object represents an array type, a primitive type, or void, then the returned array has length 0.
    The elements in the returned array are not sorted and are not in any particular order.
    Returns:
    the array ofMethod objects representing all the declared methods of this class
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared methods within this class
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.4 Method Declarations
  - getDeclaredConstructors
```
public Constructor<?>[] getDeclaredConstructors()                                         throwsSecurityException
```
    Returns an array ofConstructor objects reflecting all the constructors declared by the class represented by thisClass object. These are public, protected, default (package) access, and private constructors. The elements in the array returned are not sorted and are not in any particular order. If the class has a default constructor, it is included in the returned array. This method returns an array of length 0 if thisClass object represents an interface, a primitive type, an array class, or void.
    SeeThe Java Language Specification, section 8.2.
    Returns:
    the array ofConstructor objects representing all the declared constructors of this class
    Throws:
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared constructors within this class
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
  - getDeclaredField
```
public Field getDeclaredField(String name)                       throwsNoSuchFieldException,SecurityException
```
    Returns aField object that reflects the specified declared field of the class or interface represented by thisClass object. Thename parameter is aString that specifies the simple name of the desired field.
    If thisClass object represents an array type, then this method does not find thelength field of the array type.
    Parameters:
    name - the name of the field
    Returns:
    theField object for the specified field in this class
    Throws:
    NoSuchFieldException - if a field with the specified name is not found.
    NullPointerException - ifname isnull
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared field
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.3 Field Declarations
  - getDeclaredMethod
```
public Method getDeclaredMethod(String name,Class<?>... parameterTypes)                         throwsNoSuchMethodException,SecurityException
```
    Returns aMethod object that reflects the specified declared method of the class or interface represented by thisClass object. Thename parameter is aString that specifies the simple name of the desired method, and theparameterTypes parameter is an array ofClass objects that identify the method's formal parameter types, in declared order. If more than one method with the same parameter types is declared in a class, and one of these methods has a return type that is more specific than any of the others, that method is returned; otherwise one of the methods is chosen arbitrarily. If the name is "<init>"or "<clinit>" aNoSuchMethodException is raised.
    If thisClass object represents an array type, then this method does not find theclone() method.
    Parameters:
    name - the name of the method
    parameterTypes - the parameter array
    Returns:
    theMethod object for the method of this class matching the specified name and parameters
    Throws:
    NoSuchMethodException - if a matching method is not found.
    NullPointerException - ifname isnull
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared method
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
    SeeThe Java™ Language Specification:
    8.2 Class Members, 8.4 Method Declarations
  - getDeclaredConstructor
```
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)                                      throwsNoSuchMethodException,SecurityException
```
    Returns aConstructor object that reflects the specified constructor of the class or interface represented by thisClass object. TheparameterTypes parameter is an array ofClass objects that identify the constructor's formal parameter types, in declared order. If thisClass object represents an inner class declared in a non-static context, the formal parameter types include the explicit enclosing instance as the first parameter.
    Parameters:
    parameterTypes - the parameter array
    Returns:
    TheConstructor object for the constructor with the specified parameter list
    Throws:
    NoSuchMethodException - if a matching method is not found.
    SecurityException - If a security manager,s, is present and any of the following conditions is met:
    the caller's class loader is not the same as the class loader of this class and invocation ofs.checkPermission method withRuntimePermission("accessDeclaredMembers") denies access to the declared constructor
    the caller's class loader is not the same as or an ancestor of the class loader for the current class and invocation ofs.checkPackageAccess() denies access to the package of this class
    Since:
    1.1
  - getResourceAsStream
```
public InputStream getResourceAsStream(String name)
```
    Finds a resource with a given name.
    If this class is in a namedModule then this method will attempt to find the resource in the module. This is done by delegating to the module's class loaderfindResource(String,String) method, invoking it with the module name and the absolute name of the resource. Resources in named modules are subject to the rules for encapsulation specified in theModulegetResourceAsStream method and so this method returnsnull when the resource is a non-".class" resource in a package that is not open to the caller's module.
    Otherwise, if this class is not in a named module then the rules for searching resources associated with a given class are implemented by the definingclass loader of the class. This method delegates to this object's class loader. If this object was loaded by the bootstrap class loader, the method delegates toClassLoader.getSystemResourceAsStream(java.lang.String).
    Before delegation, an absolute resource name is constructed from the given resource name using this algorithm:
    If thename begins with a'/' ('\u002f'), then the absolute name of the resource is the portion of thename following the'/'.
    Otherwise, the absolute name is of the following form:
    modified_package_name/name
    Where themodified_package_name is the package name of this object with'/' substituted for'.' ('\u002e').
    Parameters:
    name - name of the desired resource
    Returns:
    AInputStream object;null if no resource with this name is found, the resource is in a package that is notopen to at least the caller module, or access to the resource is denied by the security manager.
    Throws:
    NullPointerException - Ifname isnull
    Since:
    1.1
    See Also:
    Module.getResourceAsStream(String)
  - getResource
```
public URL getResource(String name)
```
    Finds a resource with a given name.
    If this class is in a namedModule then this method will attempt to find the resource in the module. This is done by delegating to the module's class loaderfindResource(String,String) method, invoking it with the module name and the absolute name of the resource. Resources in named modules are subject to the rules for encapsulation specified in theModulegetResourceAsStream method and so this method returnsnull when the resource is a non-".class" resource in a package that is not open to the caller's module.
    Otherwise, if this class is not in a named module then the rules for searching resources associated with a given class are implemented by the definingclass loader of the class. This method delegates to this object's class loader. If this object was loaded by the bootstrap class loader, the method delegates toClassLoader.getSystemResource(java.lang.String).
    Before delegation, an absolute resource name is constructed from the given resource name using this algorithm:
    If thename begins with a'/' ('\u002f'), then the absolute name of the resource is the portion of thename following the'/'.
    Otherwise, the absolute name is of the following form:
    modified_package_name/name
    Where themodified_package_name is the package name of this object with'/' substituted for'.' ('\u002e').
    Parameters:
    name - name of the desired resource
    Returns:
    AURL object;null if no resource with this name is found, the resource cannot be located by a URL, the resource is in a package that is notopen to at least the caller module, or access to the resource is denied by the security manager.
    Throws:
    NullPointerException - Ifname isnull
    Since:
    1.1
  - getProtectionDomain
```
public ProtectionDomain getProtectionDomain()
```
    Returns theProtectionDomain of this class. If there is a security manager installed, this method first calls the security manager'scheckPermission method with aRuntimePermission("getProtectionDomain") permission to ensure it's ok to get theProtectionDomain.
    Returns:
    the ProtectionDomain of this class
    Throws:
    SecurityException - if a security manager exists and itscheckPermission method doesn't allow getting the ProtectionDomain.
    Since:
    1.2
    See Also:
    ProtectionDomain,SecurityManager.checkPermission(java.security.Permission),RuntimePermission
  - desiredAssertionStatus
```
public boolean desiredAssertionStatus()
```
    Returns the assertion status that would be assigned to this class if it were to be initialized at the time this method is invoked. If this class has had its assertion status set, the most recent setting will be returned; otherwise, if any package default assertion status pertains to this class, the most recent setting for the most specific pertinent package default assertion status is returned; otherwise, if this class is not a system class (i.e., it has a class loader) its class loader's default assertion status is returned; otherwise, the system class default assertion status is returned.
    Few programmers will have any need for this method; it is provided for the benefit of the JRE itself. (It allows a class to determine at the time that it is initialized whether assertions should be enabled.) Note that this method is not guaranteed to return the actual assertion status that was (or will be) associated with the specified class when it was (or will be) initialized.
    Returns:
    the desired assertion status of the specified class.
    Since:
    1.4
    See Also:
    ClassLoader.setClassAssertionStatus(java.lang.String, boolean),ClassLoader.setPackageAssertionStatus(java.lang.String, boolean),ClassLoader.setDefaultAssertionStatus(boolean)
  - isEnum
```
public boolean isEnum()
```
    Returns true if and only if this class was declared as an enum in the source code.
    Returns:
    true if and only if this class was declared as an enum in the source code
    Since:
    1.5
  - getEnumConstants
```
public T[] getEnumConstants()
```
    Returns the elements of this enum class or null if this Class object does not represent an enum type.
    Returns:
    an array containing the values comprising the enum class represented by this Class object in the order they're declared, or null if this Class object does not represent an enum type
    Since:
    1.5
  - cast
```
public T cast(Object obj)
```
    Casts an object to the class or interface represented by thisClass object.
    Parameters:
    obj - the object to be cast
    Returns:
    the object after casting, or null if obj is null
    Throws:
    ClassCastException - if the object is not null and is not assignable to the type T.
    Since:
    1.5
  - asSubclass
```
public <U> Class<? extends U> asSubclass(Class<U> clazz)
```
    Casts thisClass object to represent a subclass of the class represented by the specified class object. Checks that the cast is valid, and throws aClassCastException if it is not. If this method succeeds, it always returns a reference to this class object.
    This method is useful when a client needs to "narrow" the type of aClass object to pass it to an API that restricts theClass objects that it is willing to accept. A cast would generate a compile-time warning, as the correctness of the cast could not be checked at runtime (because generic types are implemented by erasure).
    Type Parameters:
    U - the type to cast this class object to
    Parameters:
    clazz - the class of the type to cast this class object to
    Returns:
    thisClass object, cast to represent a subclass of the specified class object.
    Throws:
    ClassCastException - if thisClass object does not represent a subclass of the specified class (here "subclass" includes the class itself).
    Since:
    1.5
  - getAnnotation
```
public <A extendsAnnotation> A getAnnotation(Class<A> annotationClass)
```
    Description copied from interface: AnnotatedElement
    Returns this element's annotation for the specified type if such an annotation ispresent, else null.
    Specified by:
    getAnnotation in interface AnnotatedElement
    Type Parameters:
    A - the type of the annotation to query for and return if present
    Parameters:
    annotationClass - the Class object corresponding to the annotation type
    Returns:
    this element's annotation for the specified annotation type if present on this element, else null
    Throws:
    NullPointerException - if the given annotation class is null
    Since:
    1.5
  - isAnnotationPresent
```
public boolean isAnnotationPresent(Class<? extendsAnnotation> annotationClass)
```
    Returns true if an annotation for the specified type ispresent on this element, else false. This method is designed primarily for convenient access to marker annotations.
    The truth value returned by this method is equivalent to:getAnnotation(annotationClass) != null
    The body of the default method is specified to be the code above.
    Specified by:
    isAnnotationPresent in interface AnnotatedElement
    Parameters:
    annotationClass - the Class object corresponding to the annotation type
    Returns:
    true if an annotation for the specified annotation type is present on this element, else false
    Throws:
    NullPointerException - if the given annotation class is null
    Since:
    1.5
  - getAnnotationsByType
```
public <A extendsAnnotation> A[] getAnnotationsByType(Class<A> annotationClass)
```
    Description copied from interface: AnnotatedElement
    Returns annotations that areassociated with this element. If there are no annotationsassociated with this element, the return value is an array of length 0. The difference between this method andAnnotatedElement.getAnnotation(Class) is that this method detects if its argument is arepeatable annotation type (JLS 9.6), and if so, attempts to find one or more annotations of that type by "looking through" a container annotation. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.
    Specified by:
    getAnnotationsByType in interface AnnotatedElement
    Type Parameters:
    A - the type of the annotation to query for and return if present
    Parameters:
    annotationClass - the Class object corresponding to the annotation type
    Returns:
    all this element's annotations for the specified annotation type if associated with this element, else an array of length zero
    Throws:
    NullPointerException - if the given annotation class is null
    Since:
    1.8
  - getAnnotations
```
public Annotation[] getAnnotations()
```
    Description copied from interface: AnnotatedElement
    Returns annotations that arepresent on this element. If there are no annotationspresent on this element, the return value is an array of length 0. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.
    Specified by:
    getAnnotations in interface AnnotatedElement
    Returns:
    annotations present on this element
    Since:
    1.5
  - getDeclaredAnnotation
```
public <A extendsAnnotation> A getDeclaredAnnotation(Class<A> annotationClass)
```
    Description copied from interface: AnnotatedElement
    Returns this element's annotation for the specified type if such an annotation isdirectly present, else null. This method ignores inherited annotations. (Returns null if no annotations are directly present on this element.)
    Specified by:
    getDeclaredAnnotation in interface AnnotatedElement
    Type Parameters:
    A - the type of the annotation to query for and return if directly present
    Parameters:
    annotationClass - the Class object corresponding to the annotation type
    Returns:
    this element's annotation for the specified annotation type if directly present on this element, else null
    Throws:
    NullPointerException - if the given annotation class is null
    Since:
    1.8
  - getDeclaredAnnotationsByType
```
public <A extendsAnnotation> A[] getDeclaredAnnotationsByType(Class<A> annotationClass)
```
    Description copied from interface: AnnotatedElement
    Returns this element's annotation(s) for the specified type if such annotations are eitherdirectly present orindirectly present. This method ignores inherited annotations. If there are no specified annotations directly or indirectly present on this element, the return value is an array of length 0. The difference between this method andAnnotatedElement.getDeclaredAnnotation(Class) is that this method detects if its argument is arepeatable annotation type (JLS 9.6), and if so, attempts to find one or more annotations of that type by "looking through" a container annotation if one is present. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.
    Specified by:
    getDeclaredAnnotationsByType in interface AnnotatedElement
    Type Parameters:
    A - the type of the annotation to query for and return if directly or indirectly present
    Parameters:
    annotationClass - the Class object corresponding to the annotation type
    Returns:
    all this element's annotations for the specified annotation type if directly or indirectly present on this element, else an array of length zero
    Throws:
    NullPointerException - if the given annotation class is null
    Since:
    1.8
  - getDeclaredAnnotations
```
public Annotation[] getDeclaredAnnotations()
```
    Description copied from interface: AnnotatedElement
    Returns annotations that aredirectly present on this element. This method ignores inherited annotations. If there are no annotationsdirectly present on this element, the return value is an array of length 0. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.
    Specified by:
    getDeclaredAnnotations in interface AnnotatedElement
    Returns:
    annotations directly present on this element
    Since:
    1.5
  - getAnnotatedSuperclass
```
public AnnotatedType getAnnotatedSuperclass()
```
    Returns anAnnotatedType object that represents the use of a type to specify the superclass of the entity represented by this Class object. (Theuse of type Foo to specify the superclass in '... extends Foo' is distinct from thedeclaration of type Foo.)
    If thisClass object represents a type whose declaration does not explicitly indicate an annotated superclass, then the return value is anAnnotatedType object representing an element with no annotations.
    If thisClass represents either theObject class, an interface type, an array type, a primitive type, or void, the return value isnull.
    Returns:
    an object representing the superclass
    Since:
    1.8
  - getAnnotatedInterfaces
```
public AnnotatedType[] getAnnotatedInterfaces()
```
    Returns an array ofAnnotatedType objects that represent the use of types to specify superinterfaces of the entity represented by thisClass object. (Theuse of type Foo to specify a superinterface in '... implements Foo' is distinct from thedeclaration of type Foo.)
    If thisClass object represents a class, the return value is an array containing objects representing the uses of interface types to specify interfaces implemented by the class. The order of the objects in the array corresponds to the order of the interface types used in the 'implements' clause of the declaration of thisClass object.
    If thisClass object represents an interface, the return value is an array containing objects representing the uses of interface types to specify interfaces directly extended by the interface. The order of the objects in the array corresponds to the order of the interface types used in the 'extends' clause of the declaration of thisClass object.
    If thisClass object represents a class or interface whose declaration does not explicitly indicate any annotated superinterfaces, the return value is an array of length 0.
    If thisClass object represents either theObject class, an array type, a primitive type, or void, the return value is an array of length 0.
    Returns:
    an array representing the superinterfaces
    Since:
    1.8
  - getNestHost
```
public Class<?> getNestHost()
```
    Returns the nest host of thenest to which the class or interface represented by thisClass object belongs. Every class and interface is a member of exactly one nest. A class or interface that is not recorded as belonging to a nest belongs to the nest consisting only of itself, and is the nest host.
    Each of theClass objects representing array types, primitive types, andvoid returnsthis to indicate that the represented entity belongs to the nest consisting only of itself, and is the nest host.
    If there is alinkage error accessing the nest host, or if this class or interface is not enumerated as a member of the nest by the nest host, then it is considered to belong to its own nest andthis is returned as the host.
    API Note:
    Aclass file of version 55.0 or greater may record the host of the nest to which it belongs by using theNestHost attribute (JVMS 4.7.28). Alternatively, aclass file of version 55.0 or greater may act as a nest host by enumerating the nest's other members with theNestMembers attribute (JVMS 4.7.29). Aclass file of version 54.0 or lower does not use these attributes.
    Returns:
    the nest host of this class or interface
    Throws:
    SecurityException - If the returned class is not the current class, and if a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for the returned class and invocation ofs.checkPackageAccess() denies access to the package of the returned class
    Since:
    11
    SeeThe Java™ Virtual Machine Specification:
    4.7.28 and 4.7.29 NestHost and NestMembers attributes, 5.4.4 Access Control
  - isNestmateOf
```
public boolean isNestmateOf(Class<?> c)
```
    Determines if the givenClass is a nestmate of the class or interface represented by thisClass object. Two classes or interfaces are nestmates if they have the samenest host.
    Parameters:
    c - the class to check
    Returns:
    true if this class andc are members of the same nest; andfalse otherwise.
    Since:
    11
  - getNestMembers
```
public Class<?>[] getNestMembers()
```
    Returns an array containingClass objects representing all the classes and interfaces that are members of the nest to which the class or interface represented by thisClass object belongs. Thenest host of that nest is the zeroth element of the array. Subsequent elements represent any classes or interfaces that are recorded by the nest host as being members of the nest; the order of such elements is unspecified. Duplicates are permitted. If the nest host of that nest does not enumerate any members, then the array has a single element containingthis.
    Each of theClass objects representing array types, primitive types, andvoid returns an array containing onlythis.
    This method validates that, for each class or interface which is recorded as a member of the nest by the nest host, that class or interface records itself as a member of that same nest. Any exceptions that occur during this validation are rethrown by this method.
    Returns:
    an array of all classes and interfaces in the same nest as this class
    Throws:
    LinkageError - If there is any problem loading or validating a nest member or its nest host
    SecurityException - If any returned class is not the current class, and if a security manager,s, is present and the caller's class loader is not the same as or an ancestor of the class loader for that returned class and invocation ofs.checkPackageAccess() denies access to the package of that returned class
    Since:
    11
    See Also:
    getNestHost()

Element Type	Encoding
boolean	Z
byte	B
char	C
class or interface	Lclassname;
double	D
float	F
int	I
long	J
short	S

Movatterモバイル変換

Class Class<T>

Method Summary

Methods declared in class java.lang.Object

Method Detail

toString

toGenericString

forName

forName

forName

newInstance

isInstance

isAssignableFrom

isInterface

isArray

isPrimitive

isAnnotation

isSynthetic

getName

getClassLoader

getModule

getTypeParameters

getSuperclass

getGenericSuperclass

getPackage

getPackageName

getInterfaces

getGenericInterfaces

getComponentType

getModifiers

getSigners

getEnclosingMethod

getEnclosingConstructor

getDeclaringClass

getEnclosingClass

getSimpleName

getTypeName

getCanonicalName

isAnonymousClass

isLocalClass

isMemberClass

getClasses

getFields

getMethods

getConstructors

getField

getMethod

getConstructor

getDeclaredClasses

getDeclaredFields

getDeclaredMethods

getDeclaredConstructors

getDeclaredField

getDeclaredMethod

getDeclaredConstructor

getResourceAsStream

getResource

getProtectionDomain

desiredAssertionStatus

isEnum

getEnumConstants

cast

asSubclass

getAnnotation

isAnnotationPresent

getAnnotationsByType

getAnnotations

getDeclaredAnnotation

getDeclaredAnnotationsByType

getDeclaredAnnotations

getAnnotatedSuperclass

getAnnotatedInterfaces

getNestHost

isNestmateOf

getNestMembers