面向对象_类名作为返回值类型

/*
  返回值类型
    基本类型(简单)
    引用类型:
      类:返回的是该类的对象
      抽象类:
      接口:
*/
class Student{
  public void study(){
    System.out.println("Good Good study,Day Day Up");
  }
}

class StudentDemo{
  public Student getStudent(){
    //Student s = new Student();
    //Student ss = s;
    
    //Student s = new Student();
    //return s;
    return new Student();
  }
}

class StudentTest2{
  public static void main(String[] args){
    //需求:我要使用Student类中的study()方法
    //但是,这一次不要直接建对象
    //让StudetnDemo帮你创对象
    StudentDemo sd = new StudentDemo();
    Student s = sd.getStudent();//new Student(); Student s = new Student();
    s.study();
  }
}