编辑代码

import java.util.Arrays;

//程序4-3
class ArrayCopy {
    public static void main(String args[]) {
        int src[] = {1, 2, 3, 4, 5, 6};
        int dest[] = {10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
        System.arraycopy(src, 0, dest, 0, src.length);
        for (int x : dest) {
            System.out.print(x);
        }

        System.out.println();
        dest = Arrays.copyOf(src, 2 * src.length);
        for (int x : dest) {
            System.out.print(x);
        }
    }
}