类名作为返回值类型

Student.java文件

public class Student {
    public void study()
    {
        System.out.println("好好学习，天天向上");
    }

}

Teacher.java文件

public class Teacher {
    public Student getStudent()
    {
        Student s=new Student();
        return s;
    }
}

Test.java文件

//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:其实返回的该类的对象
public class Test {
    public static void main(String[] args) {
        Teacher t=new Teacher();
        Student s=t.getStudent();
        s.study();
    }