Movatterモバイル変換

Class Array

java.lang.Object
- java.lang.reflect.Array

```
public final classArrayextendsObject
```
TheArray class provides static methods to dynamically create and access Java arrays.
Array permits widening conversions to occur during a get or set operation, but throws anIllegalArgumentException if a narrowing conversion would occur.
Since:
1.1

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`staticObject`	`get(Object array, int index)`	Returns the value of the indexed component in the specified array object.
`static boolean`	`getBoolean(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`boolean`.
`static byte`	`getByte(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`byte`.
`static char`	`getChar(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`char`.
`static double`	`getDouble(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`double`.
`static float`	`getFloat(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`float`.
`static int`	`getInt(Object array, int index)`	Returns the value of the indexed component in the specified array object, as an`int`.
`static int`	`getLength(Object array)`	Returns the length of the specified array object, as an`int`.
`static long`	`getLong(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`long`.
`static short`	`getShort(Object array, int index)`	Returns the value of the indexed component in the specified array object, as a`short`.
`staticObject`	`newInstance(Class<?> componentType, int length)`	Creates a new array with the specified component type and length.
`staticObject`	`newInstance(Class<?> componentType, int... dimensions)`	Creates a new array with the specified component type and dimensions.
`static void`	`set(Object array, int index,Object value)`	Sets the value of the indexed component of the specified array object to the specified new value.
`static void`	`setBoolean(Object array, int index, boolean z)`	Sets the value of the indexed component of the specified array object to the specified`boolean` value.
`static void`	`setByte(Object array, int index, byte b)`	Sets the value of the indexed component of the specified array object to the specified`byte` value.
`static void`	`setChar(Object array, int index, char c)`	Sets the value of the indexed component of the specified array object to the specified`char` value.
`static void`	`setDouble(Object array, int index, double d)`	Sets the value of the indexed component of the specified array object to the specified`double` value.
`static void`	`setFloat(Object array, int index, float f)`	Sets the value of the indexed component of the specified array object to the specified`float` value.
`static void`	`setInt(Object array, int index, int i)`	Sets the value of the indexed component of the specified array object to the specified`int` value.
`static void`	`setLong(Object array, int index, long l)`	Sets the value of the indexed component of the specified array object to the specified`long` value.
`static void`	`setShort(Object array, int index, short s)`	Sets the value of the indexed component of the specified array object to the specified`short` value.

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

- Method Detail
  - newInstance
```
public static Object newInstance(Class<?> componentType,                                 int length)                          throwsNegativeArraySizeException
```
    Creates a new array with the specified component type and length. Invoking this method is equivalent to creating an array as follows:
    int[] x = {length}; Array.newInstance(componentType, x);
    The number of dimensions of the new array must not exceed 255.
    Parameters:
    componentType - theClass object representing the component type of the new array
    length - the length of the new array
    Returns:
    the new array
    Throws:
    NullPointerException - if the specifiedcomponentType parameter is null
    IllegalArgumentException - if componentType isVoid.TYPE or if the number of dimensions of the requested array instance exceed 255.
    NegativeArraySizeException - if the specifiedlength is negative
  - newInstance
```
public static Object newInstance(Class<?> componentType,                                 int... dimensions)                          throwsIllegalArgumentException,NegativeArraySizeException
```
    Creates a new array with the specified component type and dimensions. IfcomponentType represents a non-array class or interface, the new array hasdimensions.length dimensions andcomponentType as its component type. IfcomponentType represents an array class, the number of dimensions of the new array is equal to the sum ofdimensions.length and the number of dimensions ofcomponentType. In this case, the component type of the new array is the component type ofcomponentType.
    The number of dimensions of the new array must not exceed 255.
    Parameters:
    componentType - theClass object representing the component type of the new array
    dimensions - an array ofint representing the dimensions of the new array
    Returns:
    the new array
    Throws:
    NullPointerException - if the specifiedcomponentType argument is null
    IllegalArgumentException - if the specifieddimensions argument is a zero-dimensional array, if componentType isVoid.TYPE, or if the number of dimensions of the requested array instance exceed 255.
    NegativeArraySizeException - if any of the components in the specifieddimensions argument is negative.
  - getLength
```
public static int getLength(Object array)                     throwsIllegalArgumentException
```
    Returns the length of the specified array object, as anint.
    Parameters:
    array - the array
    Returns:
    the length of the array
    Throws:
    IllegalArgumentException - if the object argument is not an array
  - get
```
public static Object get(Object array,                         int index)                  throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object. The value is automatically wrapped in an object if it has a primitive type.
    Parameters:
    array - the array
    index - the index
    Returns:
    the (possibly wrapped) value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
  - getBoolean
```
public static boolean getBoolean(Object array,                                 int index)                          throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as aboolean.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getByte
```
public static byte getByte(Object array,                           int index)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as abyte.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getChar
```
public static char getChar(Object array,                           int index)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as achar.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getShort
```
public static short getShort(Object array,                             int index)                      throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as ashort.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getInt
```
public static int getInt(Object array,                         int index)                  throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as anint.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getLong
```
public static long getLong(Object array,                           int index)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as along.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getFloat
```
public static float getFloat(Object array,                             int index)                      throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as afloat.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - getDouble
```
public static double getDouble(Object array,                               int index)                        throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Returns the value of the indexed component in the specified array object, as adouble.
    Parameters:
    array - the array
    index - the index
    Returns:
    the value of the indexed component in the specified array
    Throws:
    NullPointerException - If the specified object is null
    IllegalArgumentException - If the specified object is not an array, or if the indexed element cannot be converted to the return type by an identity or widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    get(java.lang.Object, int)
  - set
```
public static void set(Object array,                       int index,Object value)                throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specified new value. The new value is first automatically unwrapped if the array has a primitive component type.
    Parameters:
    array - the array
    index - the index into the array
    value - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the array component type is primitive and an unwrapping conversion fails
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
  - setBoolean
```
public static void setBoolean(Object array,                              int index,                              boolean z)                       throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedboolean value.
    Parameters:
    array - the array
    index - the index into the array
    z - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setByte
```
public static void setByte(Object array,                           int index,                           byte b)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedbyte value.
    Parameters:
    array - the array
    index - the index into the array
    b - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setChar
```
public static void setChar(Object array,                           int index,                           char c)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedchar value.
    Parameters:
    array - the array
    index - the index into the array
    c - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setShort
```
public static void setShort(Object array,                            int index,                            short s)                     throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedshort value.
    Parameters:
    array - the array
    index - the index into the array
    s - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setInt
```
public static void setInt(Object array,                          int index,                          int i)                   throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedint value.
    Parameters:
    array - the array
    index - the index into the array
    i - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setLong
```
public static void setLong(Object array,                           int index,                           long l)                    throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedlong value.
    Parameters:
    array - the array
    index - the index into the array
    l - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setFloat
```
public static void setFloat(Object array,                            int index,                            float f)                     throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifiedfloat value.
    Parameters:
    array - the array
    index - the index into the array
    f - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)
  - setDouble
```
public static void setDouble(Object array,                             int index,                             double d)                      throwsIllegalArgumentException,ArrayIndexOutOfBoundsException
```
    Sets the value of the indexed component of the specified array object to the specifieddouble value.
    Parameters:
    array - the array
    index - the index into the array
    d - the new value of the indexed component
    Throws:
    NullPointerException - If the specified object argument is null
    IllegalArgumentException - If the specified object argument is not an array, or if the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening conversion
    ArrayIndexOutOfBoundsException - If the specifiedindex argument is negative, or if it is greater than or equal to the length of the specified array
    See Also:
    set(java.lang.Object, int, java.lang.Object)

Movatterモバイル変換

Class Array

Method Summary

Methods declared in class java.lang.Object

Method Detail

newInstance

newInstance

getLength

get

getBoolean

getByte

getChar

getShort

getInt

getLong

getFloat

getDouble

set

setBoolean

setByte

setChar

setShort

setInt

setLong

setFloat

setDouble