int n1 = 2; int n2 = n1;

int[] arr1 = {1,2,3};
int[] arr2 = arr1;

//基本数据类型赋值, 赋值方式为值拷贝
  //n2的变化，不会影响到n1的值
  int n1 = 10;
  int n2 = n1;

  n2 = 80;
  System.out.println("n1=" + n1);//10
  System.out.println("n2=" + n2);//80

  //数组在默认情况下是引用传递，赋的值是地址，赋值方式为引用赋值
  //是一个地址 , arr2变化会影响到 arr1
  int[] arr1 = {1, 2, 3};
  int[] arr2 = arr1;//把 arr1赋给 arr2
  arr2[0] = 10;

  //看看arr1的值
  System.out.println("====arr1的元素====");
  for(int i = 0; i < arr1.length; i++) {
    System.out.println(arr1[i]);//10, 2, 3
  }

  System.out.println("====arr2的元素====");
  for(int i = 0; i < arr2.length; i++) {
    System.out.println(arr2[i]);//10, 2, 3
  }