- class Student
- {
- public abstract void study();
- public void sleep(){
- System.out.println("趟着睡");
- }
- }
- class DoStudent
- {
- public void dosome(Student s){
- s.study();
- s.sleep();
- }
- }
- class BaseStudent extends Student
- {
- public void study(){
- System.out.println("base study");
- }
- }
- class AdvStudent extends Student
- {
- public void study(){
- System.out.println("Adv study")
- }
- }
- class DuoTaiSemo1
- {
- public static void main(String[] args)
- {
- DoStudent ds = new DoStudent();
- ds.dosome(new BaseStudent());
- }
- }
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好几次出现这个问题,哪位大侠能帮忙解决下 不要说换个文本在编译就没问题这种回答 我想知道的是怎么解决 我是用EditPlus
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