java面向对象基础语法之两个引用指向同一个对象内存图

public class 服务器托管网Student1 {
          String name;
          int age;
          public void study() {
              System.out.println("好好学习");
          }

public static void main(String[] args) {
          Student s1 = new Student();
          System.out.println(s1);
          s1.name = "小明";
          Student s2 = s1;
          //System.out.println(s2);
          s2.name = "小亮";
          s2.age = 21;
          System.out.println(s2.name + "...." + s1.age);
          s1 = null;;
          System.out.println(s1.name);
          System.out.println(s2.name);
          s2 = null;
      }
}