1.1 类名作为方法的形式参数

package com.itheima_10;public class Student {public void study() {System.out.println("好好学习,天天向上");}}package com.itheima_10;public class Teacher {public void test(Student s) {//接收传递过来的Student对象的地址值s.study();                  }}package com.itheima_10;//需求： 调用Teacher的test方法//类名作为形式参数：其实这里需要的是该类对象。public class Test {public static void main(String[] args) {Teacher t = new Teacher();Student s = new Student();t.test(s);}}

1.2 类名作为返回值案例

package com.itheima_11;public class Student {public void study() {System.out.println("好好学习,天天向上");}}package com.itheima_11;public class Teacher {public Student getStudent() {Student s = new Student();return s;//返回的是Student对象的地址值}}

package com.itheima_11;//需求： 通过Teacher得到Student对象，然后调用Student类的方法//如果方法的返回值是类名：其实返回的是该类的对象public class Test {public static void main(String[] args) {Teacher t = new Teacher();Student s = t.getStudent();s.study();}}