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.

Public Method Summary

static Object
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.
static Object
newInstance(Class<?> componentType, int length)
Creates a new array with the specified component type and length.
static Object
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 value)
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 value)
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 value)
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 value)
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 value)
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 value)
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 value)
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 value)
Sets the value of the indexed component of the specified array object to the specified short value.

Inherited Method Summary

Public Methods

public static Object get (Object array, int index)

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 specified index argument is negative, or if it is greater than or equal to the length of the specified array

public static boolean getBoolean (Object array, int index)

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

Parameters
array the array
index the index
Returns