JAVA学习–Abstract使用方法

 1 public class TestAbstract {
 2     public static void main(String[] args) {
 3         //Person p1 = new Person();
 4         //p1.eat();
 5        
 6         Student s = new Student();
 7         s.eat();
 8        
 9         Person p = new Student();//多态
10         p.eat();
11        
12     }
13 }
14 
15 abstract class Creator{
16     abstract void breath();
17 }
18 
19 abstract class Person extends Creator{
20     String name;
21     public abstract void eat();
22     public abstract void walk();
23    
24     public String getName() {
25         return name;
26     }
27     public void setName(String name) {
28         this.name = name;
29     }
30     public Person(){
31        
32     }
33     public Person(String name){
34         this.name = name;
35     }
36 }
37 class Student extends Person{
38     public void eat(){
39         System.out.println("学生吃饭");
40     }
41     public void walk(){
42         System.out.println("学生走路");
43     }
44     @Override
45     void breath() {
46         System.out.println("学生不应该呼吸雾霾的空气");
47     }
48 }
49 
50 abstract class Worker extends Person{
51     public void eat(){
52         System.out.println("工人吃饭");
53     }
54 //    public void walk(){
55 //        System.out.println("工人走路");
56 //    }
57 }
58 
59 class Animal{
60     //不是抽象方法！
61     public void sleep(){
62        
63     }
64 }