1 package com.mydemo; 2 3 public class Student { 4 public void study() { 5 System.out.println("好好学习,天天向上"); 6 } 7 } 8 9 10 package com.mydemo; 11 12 public class Teacher { 13 public void test(Student s) {//接收传递过来的Student对象的地址值 14 s.study(); 15 } 16 } 17 18 19 package com.mydemo; 20 21 //需求: 调用Teacher的test方法 22 23 //类名作为形式参数:其实这里需要的是该类对象。 24 public class Test { 25 public static void main(String[] args) { 26 Teacher t = new Teacher(); 27 Student s = new Student(); 28 t.test(s); //好好学习,天天向上 29 } 30 }