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Class java.lang.reflect.Array

java.lang.Object
   |
   +----java.lang.reflect.Array

public final class Array
extends Object

The Array 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 an IllegalArgumentException if a narrowing conversion would occur.

get(Object, int): Returns the value of the indexed component in the specified array object.
getBoolean(Object, int): Returns the value of the indexed component in the specified array object, as a boolean.
getByte(Object, int): Returns the value of the indexed component in the specified array object, as a byte.
getChar(Object, int): Returns the value of the indexed component in the specified array object, as a char.
getDouble(Object, int): Returns the value of the indexed component in the specified array object, as a double.
getFloat(Object, int): Returns the value of the indexed component in the specified array object, as a float.
getInt(Object, int): Returns the value of the indexed component in the specified array object, as an int.
getLength(Object): Returns the length of the specified array object, as an int.
getLong(Object, int): Returns the value of the indexed component in the specified array object, as a long.
getShort(Object, int): Returns the value of the indexed component in the specified array object, as a short.
newInstance(Class, int): Creates a new array with the specified component type and length.
newInstance(Class, int[]): Creates a new array with the specified component type and dimensions.
set(Object, int, Object): Sets the value of the indexed component of the specified array object to the specified new value.
setBoolean(Object, int, boolean): Sets the value of the indexed component of the specified array object to the specified boolean value.
setByte(Object, int, byte): Sets the value of the indexed component of the specified array object to the specified boolean value.
setChar(Object, int, char): Sets the value of the indexed component of the specified array object to the specified byte value.
setDouble(Object, int, double): Sets the value of the indexed component of the specified array object to the specified double value.
setFloat(Object, int, float): Sets the value of the indexed component of the specified array object to the specified float value.
setInt(Object, int, int): Sets the value of the indexed component of the specified array object to the specified int value.
setLong(Object, int, long): Sets the value of the indexed component of the specified array object to the specified long value.
setShort(Object, int, short): Sets the value of the indexed component of the specified array object to the specified short value.

newInstance

    method newInstance(componentType=Class, -
                       length=int) returns Object public  static   Signals NegativeArraySizeException

Creates a new array with the specified component type and length. The effect is that of the equivalent array creation expression:

    new componentType[length]

Parameters:: componentType - the Class object representing the component type of the new array; length - the length of the new array
Returns:: the new array
Throws: NullPointerException: if the specified componentType parameter is null
Throws: NegativeArraySizeException: if the specified length is negative

newInstance

    method newInstance(componentType=Class, -
                       dimensions=int[]) returns Object public  static   Signals IllegalArgumentException, NegativeArraySizeException

Creates a new array with the specified component type and dimensions.

The effect is that of the equivalent array creation expression:

    new componentType[dimensions[0]][dimensions[1]]...

Parameters:: componentType - the Class object representing the component type of the new array; dimensions - an array of ints representing the dimensions of the new array
Returns:: the new array
Throws: NullPointerException: if the specified componentType argument is null
Throws: IllegalArgumentException: if the specified dimensions argument is a zero-dimensional array, or if the number of requested dimensions exceeds the limit on the number of array dimensions supported by the implementation (typically 255).
Throws: NegativeArraySizeException: if any of the components in the specified dimension argument is negative.

getLength

    method getLength(array=Object) returns int public  static   Signals IllegalArgumentException

Returns the length of the specified array object, as an int.

Parameters:: array - the array
Returns:: the length of the array
Throws: IllegalArgumentException: if the object argument is not an array

get

    method get(array=Object, -
               index=int) returns Object public  static   Signals IllegalArgumentException, 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
Throws: IllegalArgumentException: If the specified object is not an array
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array

getBoolean

    method getBoolean(array=Object, -
                      index=int) returns boolean public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a boolean.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getByte

    method getByte(array=Object, -
                   index=int) returns byte public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a byte.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getChar

    method getChar(array=Object, -
                   index=int) returns char public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a char.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getShort

    method getShort(array=Object, -
                    index=int) returns short public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a short.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getInt

    method getInt(array=Object, -
                  index=int) returns int public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as an int.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getLong

    method getLong(array=Object, -
                   index=int) returns long public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a long.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getFloat

    method getFloat(array=Object, -
                    index=int) returns float public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a float.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

getDouble

    method getDouble(array=Object, -
                     index=int) returns double public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a double.

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
Throws: 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
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: get

set

    method set(array=Object, -
               index=int, -
               value=Object)  public  static   Signals IllegalArgumentException, 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, or if the array component type is primitive and the specified value is null
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the array component type is primitive and the specified value cannot be converted to the primitive type by a combination of unwrapping and identity or widening conversions
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array

setBoolean

    method setBoolean(array=Object, -
                      index=int, -
                      z=boolean)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified boolean value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setByte

    method setByte(array=Object, -
                   index=int, -
                   b=byte)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified boolean value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setChar

    method setChar(array=Object, -
                   index=int, -
                   c=char)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified byte value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setShort

    method setShort(array=Object, -
                    index=int, -
                    s=short)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified short value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setInt

    method setInt(array=Object, -
                  index=int, -
                  i=int)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified int value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setLong

    method setLong(array=Object, -
                   index=int, -
                   l=long)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified long value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setFloat

    method setFloat(array=Object, -
                    index=int, -
                    f=float)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified float value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

setDouble

    method setDouble(array=Object, -
                     index=int, -
                     d=double)  public  static   Signals IllegalArgumentException, ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified double value.

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
Throws: IllegalArgumentException: If the specified object argument is not an array, or if the the specified value cannot be converted to the underlying array's component type by an identity or a primitive widening widening conversion
Throws: ArrayIndexOutOfBoundsException: If the specified index argument is negative, or if it is greater than or equal to the length of the specified array
See Also:: set

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