151220DuoTaiDemo2

package java151220;




 /*
需求:学生分为基础班,高级班
基础班学生:学习,睡觉
高级版 :学习,睡觉
思考:一年以后又有了冲刺半,三年以后有了大学版
 */
abstract class Student {




public abstract void study();
public void sleep() {
System.out.println("躺着睡觉!");
}

}




class BaseStudent extends Student{


@Override
public void study() {
System.out.println("base study!");
}
@Override
public void sleep() {
System.out.println("趴着睡觉!");
}

}




class AdvanceStudent extends Student{
@Override
public void study(){
System.out.println("advance study!");
}

}


//工具类
class DoStudent{
public void doSomeThing(Student student){
student.study();
student.sleep();
}
}


public class DuoTaiDemo2{
//主函数是最终调用者
public static void main(String[] args) {

// BaseStudent baseStudent =new  BaseStudent();
// baseStudent.study();
// baseStudent.sleep();
//
//
// AdvanceStudent adv =new  AdvanceStudent();
// adv.study();
// adv.sleep();

DoStudent doStudent =new DoStudent();
doStudent.doSomeThing(new BaseStudent());
doStudent.doSomeThing(new AdvanceStudent());



}

// public void doSomeThing(BaseStudent baseStudent) {
//
// }
// public void doSomeThing(AdvanceStudent advanceStudent) {
//
// }
// public void doSomeThing(Student student){
// student.study();
// student.sleep();
// }
}