数组的拷贝

package com.Demo;
//数组的拷贝
public class Test5 {
    public static void main(String[] args) {
        int[] arr={11,22,33};
        int[] arr2=copy(arr);
        dayin(arr2);
    }
    public static void dayin(int[] arr){
        System.out.print("[");
        for (int i = 0; i < arr.length; i++) {
            System.out.print(i==arr.length-1?arr[i]:arr[i]+",");
        }
        System.out.println("]");
    }
    public static int[] copy(int[] arr){
        int[] arr2=new int[arr.length];
        for (int i = 0; i < arr.length; i++) {
            arr2[i]=arr[i];
        }
        return arr2;
    }
}