1 package com.kehou.Animal;
 2 
 3 /**
 4  * 父類：動物類
 5  * @author 
 6  *
 7  */
 8 public abstract class Animal {
 9 
10     private String name;
11     
12     
13     
14     public Animal() {
15     }
16 
17     public Animal(String name) {
18         super();
19         this.name = name;
20     }
21
 
 
22     public String getName() {
23         return name;
24     }
25 
26     public void setName(String name) {
27         this.name = name;
28     }
29 
30     //顯示資訊
31     public abstract void info();
32 }

package com.kehou.Animal;

/**
 * 鳥類
 * @author 
 *
 */
public class Bird extends Animal {
    

    
 
public Bird() {}
    
    public Bird(String name) {
        super(name);
    }
    public void info() {
        System.out.println("我是一隻紅色的"+this.getName()+"！\n今年4歲了！");
    }

}

 1 package com.kehou.Animal;
 2 
 3 /**
 4  * 魚類
 5  * @author 
 6  *
 7  */
 8 public class Fish extends Animal {
 9
 
 
10     
11     public Fish() {
12         super();
13     }
14 
15     public Fish(String name) {
16         super(name);
17     }
18 
19     public void info() {
20         System.out.println("我是一條五斤重的"+this.getName()+"！\n今年2歲了！");
21     }
22 
23 }

 1 package com.kehou.Animal;
 2 
 3 public class Test {
 4     public static void main(String[] args) {
 5         Animal bird=new Bird();
 6         bird.setName("鳥");
 7         bird.info();
 8         
 9         Animal fish=new Fish();
10         fish.setName("魚");
11         fish.info();
12     }
13     
14 }