Java 继承

 1 package debug;
 2 
 3 class Person{
 4     public static void eat(){
 5         System.out.println(\"吃饭\");
 6     }
 7     
 8     public static void sleep(){
 9         System.out.println(\"睡觉\");        
10     }
11 
12 }
13 
14 class Student extends Person {
15     
16     }
17 
18 
19 class Teacher extends Person {
20     
21     }
22 
23 public class ExtendDemo {
24     public static void main(String[] args) {
25         Student s = new Student();
26         s.eat();
27         s.sleep();
28         
29         Teacher t = new Teacher();
30         t.eat();
31         t.sleep();
32     }
33 }