Copy array « System « Development

Return	Method	Summary
static void	arraycopy(Object src, int srcPos, Object dest, int destPos, int length)	Copies an array from the specified source array, beginning at the specified position, to the specified position of the destination array.

The arraycopy( ) method can be used to copy quickly an array of any type from one place to another.

 
public class Main {
  static byte a[] = {65, 66, 67, 68, 69, 70, 71, 72, 73, 74};
  static byte b[] = {77, 77, 77, 77, 77, 77, 77, 77, 77, 77};

  public static void main(String args[]) {
    System.out.println("a = " + new String(a));
    System.out.println("b = " + new String(b));
    System.arraycopy(a, 0, b, 0, a.length);
    System.out.println("a = " + new String(a));
    System.out.println("b = " + new String(b));
    System.arraycopy(a, 0, a, 1, a.length - 1);
    System.arraycopy(b, 1, b, 0, b.length - 1);
    System.out.println("a = " + new String(a));
    System.out.println("b = " + new String(b));
  }

}


a = ABCDEFGHIJ
b = MMMMMMMMMM
a = ABCDEFGHIJ
b = ABCDEFGHIJ
a = AABCDEFGHI
b = BCDEFGHIJJ