Java 对象

  Node x = new Node(5, null);
        Node y = x;

          System.out.println(x);

          System.out.println(y);

          System.out.println("____________");

        System.out.println(System.identityHashCode(x));
        System.out.println(System.identityHashCode(y));
        Integer a = 4;
        Integer b = a;
        System.out.println(System.identityHashCode(a));
        System.out.println(System.identityHashCode(b));

BinaryTree$Node@6f75e721
BinaryTree$Node@6f75e721

_______________________

2104457164
2104457164
1521118594
1521118594