Package java.lang

• Interface Summary 

  Interface	Description
  Appendable	An object to whichchar sequences and values can be appended.
  AutoCloseable	An object that may hold resources (such as file or socket handles) until it is closed.
  CharSequence	ACharSequence is a readable sequence ofchar values.
  Cloneable	A class implements theCloneable interface to indicate to theObject.clone() method that it is legal for that method to make a field-for-field copy of instances of that class.
  Comparable<T>	This interface imposes a total ordering on the objects of each class that implements it.
  Iterable<T>	Implementing this interface allows an object to be the target of the enhancedfor statement (sometimes called the "for-each loop" statement).
  ProcessHandle	ProcessHandle identifies and provides control of native processes.
  ProcessHandle.Info	Information snapshot about the process.
  Readable	AReadable is a source of characters.
  Runnable	TheRunnable interface should be implemented by any class whose instances are intended to be executed by a thread.
  StackWalker.StackFrame	AStackFrame object represents a method invocation returned byStackWalker.
  System.Logger	System.Logger instances log messages that will be routed to the underlying logging framework theLoggerFinder uses.
  Thread.UncaughtExceptionHandler	Interface for handlers invoked when aThread abruptly terminates due to an uncaught exception.

• Class Summary 

  Class	Description
  Boolean	The Boolean class wraps a value of the primitive typeboolean in an object.
  Byte	TheByte class wraps a value of primitive typebyte in an object.
  Character	TheCharacter class wraps a value of the primitive typechar in an object.
  Character.Subset	Instances of this class represent particular subsets of the Unicode character set.
  Character.UnicodeBlock	A family of character subsets representing the character blocks in the Unicode specification.
  Class<T>	Instances of the classClass represent classes and interfaces in a running Java application.
  ClassLoader	A class loader is an object that is responsible for loading classes.
  ClassValue<T>	Lazily associate a computed value with (potentially) every type.
  Compiler	Deprecated, for removal: This API element is subject to removal in a future version. JIT compilers and their technologies vary too widely to be controlled effectively by a standardized interface.
  Double	TheDouble class wraps a value of the primitive typedouble in an object.
  Enum<E extendsEnum<E>>	This is the common base class of all Java language enumeration types.
  Float	TheFloat class wraps a value of primitive typefloat in an object.
  InheritableThreadLocal<T>	This class extendsThreadLocal to provide inheritance of values from parent thread to child thread: when a child thread is created, the child receives initial values for all inheritable thread-local variables for which the parent has values.
  Integer	TheInteger class wraps a value of the primitive typeint in an object.
  Long	TheLong class wraps a value of the primitive type long in an object.
  Math	The classMath contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions.
  Module	Represents a run-time module, eithernamed or unnamed.
  ModuleLayer	A layer of modules in the Java virtual machine.
  ModuleLayer.Controller	Controls a module layer.
  Number	The abstract classNumber is the superclass of platform classes representing numeric values that are convertible to the primitive typesbyte,double,float, int,long, andshort.
  Object	ClassObject is the root of the class hierarchy.
  Package	Represents metadata about a run-time package associated with a class loader.
  Process	Process provides control of native processes started by ProcessBuilder.start and Runtime.exec.
  ProcessBuilder	This class is used to create operating system processes.
  ProcessBuilder.Redirect	Represents a source of subprocess input or a destination of subprocess output.
  Runtime	Every Java application has a single instance of classRuntime that allows the application to interface with the environment in which the application is running.
  Runtime.Version	A representation of a version string for an implementation of the Java SE Platform.
  RuntimePermission	This class is for runtime permissions.
  SecurityManager	The security manager is a class that allows applications to implement a security policy.
  Short	TheShort class wraps a value of primitive type short in an object.
  StackTraceElement	An element in a stack trace, as returned byThrowable.getStackTrace().
  StackWalker	A stack walker.
  StrictMath	The classStrictMath contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions.
  String	TheString class represents character strings.
  StringBuffer	A thread-safe, mutable sequence of characters.
  StringBuilder	A mutable sequence of characters.
  System	TheSystem class contains several useful class fields and methods.
  System.LoggerFinder	TheLoggerFinder service is responsible for creating, managing, and configuring loggers to the underlying framework it uses.
  Thread	Athread is a thread of execution in a program.
  ThreadGroup	A thread group represents a set of threads.
  ThreadLocal<T>	This class provides thread-local variables.
  Throwable	TheThrowable class is the superclass of all errors and exceptions in the Java language.
  Void	TheVoid class is an uninstantiable placeholder class to hold a reference to theClass object representing the Java keyword void.

• Enum Summary 

  Enum	Description
  Character.UnicodeScript	A family of character subsets representing the character scripts defined in theUnicode Standard Annex #24: Script Names.
  ProcessBuilder.Redirect.Type	The type of aProcessBuilder.Redirect.
  StackWalker.Option	Stack walker option to configure thestack frame information obtained by aStackWalker.
  System.Logger.Level	Systemloggers levels.
  Thread.State	A thread state.

• Exception Summary 

  Exception	Description
  ArithmeticException	Thrown when an exceptional arithmetic condition has occurred.
  ArrayIndexOutOfBoundsException	Thrown to indicate that an array has been accessed with an illegal index.
  ArrayStoreException	Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects.
  ClassCastException	Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance.
  ClassNotFoundException	Thrown when an application tries to load in a class through its string name using: TheforName method in classClass.
  CloneNotSupportedException	Thrown to indicate that theclone method in classObject has been called to clone an object, but that the object's class does not implement theCloneable interface.
  EnumConstantNotPresentException	Thrown when an application tries to access an enum constant by name and the enum type contains no constant with the specified name.
  Exception	The classException and its subclasses are a form ofThrowable that indicates conditions that a reasonable application might want to catch.
  IllegalAccessException	An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.
  IllegalArgumentException	Thrown to indicate that a method has been passed an illegal or inappropriate argument.
  IllegalCallerException	Thrown to indicate that a method has been called by an inappropriate caller.
  IllegalMonitorStateException	Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.
  IllegalStateException	Signals that a method has been invoked at an illegal or inappropriate time.
  IllegalThreadStateException	Thrown to indicate that a thread is not in an appropriate state for the requested operation.
  IndexOutOfBoundsException	Thrown to indicate that an index of some sort (such as to an array, to a string, or to a vector) is out of range.
  InstantiationException	Thrown when an application tries to create an instance of a class using thenewInstance method in classClass, but the specified class object cannot be instantiated.
  InterruptedException	Thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.
  LayerInstantiationException	Thrown when creating amodule layer fails.
  NegativeArraySizeException	Thrown if an application tries to create an array with negative size.
  NoSuchFieldException	Signals that the class doesn't have a field of a specified name.
  NoSuchMethodException	Thrown when a particular method cannot be found.
  NullPointerException	Thrown when an application attempts to usenull in a case where an object is required.
  NumberFormatException	Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not have the appropriate format.
  ReflectiveOperationException	Common superclass of exceptions thrown by reflective operations in core reflection.
  RuntimeException	RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
  SecurityException	Thrown by the security manager to indicate a security violation.
  StringIndexOutOfBoundsException	Thrown byString methods to indicate that an index is either negative or greater than the size of the string.
  TypeNotPresentException	Thrown when an application tries to access a type using a string representing the type's name, but no definition for the type with the specified name can be found.
  UnsupportedOperationException	Thrown to indicate that the requested operation is not supported.

• Error Summary 

  Error	Description
  AbstractMethodError	Thrown when an application tries to call an abstract method.
  AssertionError	Thrown to indicate that an assertion has failed.
  BootstrapMethodError	Thrown to indicate that aninvokedynamic instruction or a dynamic constant failed to resolve its bootstrap method and arguments, or forinvokedynamic instruction the bootstrap method has failed to provide acall site with atarget of the correctmethod type, or for a dynamic constant the bootstrap method has failed to provide a constant value of the required type.
  ClassCircularityError	Thrown when the Java Virtual Machine detects a circularity in the superclass hierarchy of a class being loaded.
  ClassFormatError	Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file.
  Error	AnError is a subclass ofThrowable that indicates serious problems that a reasonable application should not try to catch.
  ExceptionInInitializerError	Signals that an unexpected exception has occurred in a static initializer.
  IllegalAccessError	Thrown if an application attempts to access or modify a field, or to call a method that it does not have access to.
  IncompatibleClassChangeError	Thrown when an incompatible class change has occurred to some class definition.
  InstantiationError	Thrown when an application tries to use the Javanew construct to instantiate an abstract class or an interface.
  InternalError	Thrown to indicate some unexpected internal error has occurred in the Java Virtual Machine.
  LinkageError	Subclasses ofLinkageError indicate that a class has some dependency on another class; however, the latter class has incompatibly changed after the compilation of the former class.
  NoClassDefFoundError	Thrown if the Java Virtual Machine or aClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using thenew expression) and no definition of the class could be found.
  NoSuchFieldError	Thrown if an application tries to access or modify a specified field of an object, and that object no longer has that field.
  NoSuchMethodError	Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method.
  OutOfMemoryError	Thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector.
  StackOverflowError	Thrown when a stack overflow occurs because an application recurses too deeply.
  ThreadDeath	An instance ofThreadDeath is thrown in the victim thread when the (deprecated)Thread.stop() method is invoked.
  UnknownError	Thrown when an unknown but serious exception has occurred in the Java Virtual Machine.
  UnsatisfiedLinkError	Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a method declarednative.
  UnsupportedClassVersionError	Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported.
  VerifyError	Thrown when the "verifier" detects that a class file, though well formed, contains some sort of internal inconsistency or security problem.
  VirtualMachineError	Thrown to indicate that the Java Virtual Machine is broken or has run out of resources necessary for it to continue operating.

• Annotation Types Summary 

  Annotation Type	Description
  Deprecated	A program element annotated@Deprecated is one that programmers are discouraged from using.
  FunctionalInterface	An informative annotation type used to indicate that an interface type declaration is intended to be afunctional interface as defined by the Java Language Specification.
  Override	Indicates that a method declaration is intended to override a method declaration in a supertype.
  SafeVarargs	A programmer assertion that the body of the annotated method or constructor does not perform potentially unsafe operations on its varargs parameter.
  SuppressWarnings	Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element).