Operations on arrays, primitive arrays (like int[]
) and
* primitive wrapper arrays (like Integer[]
).
This class tries to handle null
input gracefully.
* An exception will not be thrown for a null
* array input. However, an Object array that contains a null
* element may throw an exception. Each method documents its behaviour.
Adds all the elements of the given arrays into a new array.
*The new array contains all of the element of array1
followed
* by all of the elements array2
. When an array is returned, it is always
* a new array.
* ArrayUtils.addAll(array1, null) = cloned copy of array1 * ArrayUtils.addAll(null, array2) = cloned copy of array2 * ArrayUtils.addAll([], []) = [] ** * @param array1 the first array whose elements are added to the new array. * @param array2 the second array whose elements are added to the new array. * @return The new byte[] array. * @since 2.1 */ public static byte[] addAll(byte[] array1, byte[] array2) { if (array1 == null) { return clone(array2); } else if (array2 == null) { return clone(array1); } byte[] joinedArray = new byte[array1.length + array2.length]; System.arraycopy(array1, 0, joinedArray, 0, array1.length); System.arraycopy(array2, 0, joinedArray, array1.length, array2.length); return joinedArray; } /** *
Shallow clones an array returning a typecast result and handling
* null
.
The objects in the array are not cloned, thus there is no special * handling for multi-dimensional arrays.
* *This method returns null
for a null
input array.
null
* @return the cloned array, null
if null
input
*/
public static byte[] clone(byte[] array) {
if (array == null) {
return null;
}
return (byte[]) array.clone();
}
}