day08- 多态- 传智

/*......................多态....................*/class DuoTaiDemo3 {public static void main(String[] args) {DoStudent ds = new DoStudent();ds.dosome(new BaseStudent());ds.dosome(new AdvStudent());}}abstract class Student {public abstract void study();public void sleep(){System.out.println("      躺着睡觉");}}class DoStudent{public void dosome(Student stu){stu.study();stu.sleep();}}class BaseStudent extends Student{public void study(){System.out.print("小学生");}public void sleep(){System.out.println("      坐着睡觉");}}class AdvStudent extends Student{public void study(){System.out.print("adc学生");}}