打印数组

public class kaobei {
    public static void main(String[] args) {
       int[] arr = {11,22,33};
       int[] arr2 = copy(arr);
        copy1(arr2);
    }

---

   public static void copy1(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.print("]");
   }

---

    public static int[] copy(int[] arr){
         // arr = [11,22,33]

        //1.创建arr2与arr一样的长度
        int[] arr2 = new int[arr.length];
              //arr2 = [0,0,0]

        //2.把对应的值赋值给新数组
        for (int i = 0; i < arr.length; i++) {
             arr2[i] = arr[i];
             //arr2 = [11,22,33]
        }
        return arr2;
    }
}