A:画图演示

• 三个引用，有两个数组的引用指向同一个地址
  

    public static void main(String[] args) {
        int[] arr1 = new int[3];
        int[] arr2 = new int[5];
        int[] arr3 = arr2;
        System.out.println(arr1);//[I@15db9742
        System.out.println(arr2);//[I@6d06d69c
        System.out.println(arr3);//[I@6d06d69c
        arr1[0] = 10;
        arr1[1] = 20;
        arr2[1] = 30;
        arr3[1] = 40;
        arr3[2] = 50;
        System.out.println(arr1[0]);//10
        System.out.println(arr1[1]);//20
        System.out.println(arr1[2]);//0
        System.out.println("-------------------------------");
        System.out.println(arr2[0]);//0
        System.out.println(arr2[1]);//40
        System.out.println(arr2[2]);//50
        System.out.println(arr2[3]);//0
        System.out.println(arr2[4]);//0
        System.out.println("-------------------------------");
        System.out.println(arr3[0]);//0
        System.out.println(arr3[1]);//40
        System.out.println(arr3[2]);//50
        System.out.println(arr3[3]);//0
        System.out.println(arr3[4]);//0
    }