package untitled3使用arraycopy;

/**
   使用arraycopy( )方法可以將一個任意類型的數組快速地從一個地方復制到另一個地
 方。這比使用Java中編寫的循環要快的多。下面是一個用arraycopy( )方法復制兩個數組的
 例子。首先，將數組a復制給數組b，接下來，數組a中的所有元素向后移一位，然后數組b
 中元素向前移一位。#

 a = ABCDEFGHIJ
b = MMMMMMMMMM
a = ABCDEFGHIJ
b = ABCDEFGHIJ
a = AABCDEFGHI
b = BCDEFGHIJJ
 */

// Using arraycopy().

class ACDemo {
  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));
  }
}