Java Utililty Methods Array Copy

List of utility methods to do Array Copy

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Description

The list of methods to do Array Copy are organized into topic(s).

Method

voidarraycopy(Object dest, Object src1, int length1, Object src2, int length2)
arraycopy 
System.arraycopy(src1, 0, dest, 0, length1);
System.arraycopy(src2, 0, dest, length1, length2);
voidarrayCopy(Object src, int srcPos, Object dest, int destPos, int length)
Copies elements from the src array to the dest array. 
if (length < 0 || srcPos < 0 || destPos < 0)
    throw new IndexOutOfBoundsException();
if (src instanceof Object[] && dest instanceof Object[]) {
    arrayCopy((Object[]) src, srcPos, (Object[]) dest, destPos, length);
} else if (src instanceof int[] && dest instanceof int[]) {
    arrayCopy((int[]) src, srcPos, (int[]) dest, destPos, length);
} else if (src instanceof boolean[] && dest instanceof boolean[]) {
    arrayCopy((boolean[]) src, srcPos, (boolean[]) dest, destPos, length);
...
voidarraycopy(Object src, int srcPos, Object dest, int destPos, int length)
Pases to System.arraycopy To bypass SecurityManager 
System.arraycopy(src, srcPos, dest, destPos, length);
voidarrayCopy(Object[] source, Object[] target, int size)
Copy the elements of the source array to the target array. 
if (size > MAX_JAVA_LOOP_COPY) {
    System.arraycopy(source, 0, target, 0, size);
} else {
    for (int i = 0; i < size; i++) {
        target[i] = source[i];
voidarraycopy(Object[] src, int srcPos, Object[] dest, int destPos, int length)
arraycopy 
System.arraycopy(src, srcPos, dest, destPos, length);
String[]arraycopy(String[] src)
arraycopy 
String[] copy = new String[src.length];
System.arraycopy(src, 0, copy, 0, src.length);
return copy;
voidarrayCopy(String[][] src, int src_position, String[][] dst, int dst_position, int length)
array Copy 
System.arraycopy(src, src_position, dst, dst_position, length);
for (int i = src_position; i < src_position + length; i++) {
    String[] tem = new String[src[i].length];
    System.arraycopy(src[i], 0, tem, 0, tem.length);
    src[i] = tem;
T[]arraycopy(T[] a)
arraycopy 
return Arrays.copyOf(a, a.length);
T[]arrayCopy(T[] objs)
Copy the given array. 
if (objs == null)
    return null;
Object[] copy = new Object[objs.length];
System.arraycopy(objs, 0, copy, 0, objs.length);
return (T[]) copy;
voidarraycopy(T[] src, int srcPos, T[] dest, int destPos, int length)
Short-hand method for deciding whether or not to use the native System#arraycopy(Object,int,Object,int,int) method or an element-by-element copy, based on the #JNI_COPY_ARRAY_THRESHOLD . 
if (length >= JNI_COPY_ARRAY_THRESHOLD) {
    System.arraycopy(src, srcPos, dest, destPos, length);
} else {
    for (int i = 0; i < length; i++) {
        dest[destPos + i] = src[srcPos + i];