Chapter 7、面向对象（四）--- 多态

接口

 1 package org.hanqi.pn0120;
 2 
 3 public class Computer 
 4 {
 5     //品牌
 6     private String brand;
 7     //CPU
 8     private ICPU cpu;
 9     //显卡
10     private IDisplayCard displaycard;
11     
12     
13     public String getBrand() {
14         return brand;
15     }
16     public void setBrand(String brand) {
17         this.brand = brand;
18     }
19     public ICPU getCpu() {
20         return cpu;
21     }
22     public void setCpu(ICPU cpu) {
23         this.cpu = cpu;
24     }
25     public IDisplayCard getDisplaycard() {
26         return displaycard;
27     }
28     public void setDisplaycard(IDisplayCard displaycard) {
29         this.displaycard = displaycard;
30     }
31     
32     //运行
33     public void run()
34     {
35         this.cpu.command();
36         this.displaycard.display();
37         System.out.println("我组装的"+brand+"电脑开始运行");
38     }
39     
40     public Computer(String brand) {
41         super();
42         this.brand = brand;
43     }
44 
45     public static void main(String []args)
46     {
47         //组装电脑
48         Computer c1=new Computer("hp");
49         
50         //第一种：匿名类 new AMD()
51         c1.setCpu(new AMD());
52         //第二种：
53         AMD a1=new AMD();
54         c1.setCpu(a1);
55         
56         c1.setDisplaycard(new Nivida());
57         
58         c1.run();
59         
60         
61         Computer c2=new Computer("ASUS");
62         c2.setCpu(new Intel());
63         c2.setDisplaycard(new Ati());
64         c2.run();
65         System.out.println("------------------");
66         
67         AMD2 a2=new AMD2();
68         Computer c3=new Computer("acer");
69         c3.setCpu(a2);
70         c3.setDisplaycard(a2);
71         c3.run();
72         System.out.println("------------------");
73         
74         AMD3 a3=new AMD3();
75         Computer c4=new Computer("acer");
76         c4.setCpu(a3);
77         c4.setDisplaycard(a3);
78         c4.run();
79     }
80 
81 }

1 package org.hanqi.pn0120;
2 //CPU接口
3 public interface ICPU 
4 {
5     //控制
6     public void command();
7 }

1 package org.hanqi.pn0120;
2 //显卡接口
3 public interface IDisplayCard 
4 {
5     //显示
6     public void display();
7 
8 }

 1 package org.hanqi.pn0120;
 2 
 3 public class Intel implements ICPU {
 4 
 5     @Override
 6     public void command() 
 7     {
 8         System.out.println("我是Interl的CPU");
 9 
10     }
11 
12 }

 1 package org.hanqi.pn0120;
 2 
 3 public class AMD implements ICPU 
 4 {
 5 
 6     @Override
 7     public void command() 
 8     {
 9         System.out.println("我是AMD的CPU");
10 
11     }
12 
13 }

 1 package org.hanqi.pn0120;
 2 
 3 public class Nivida implements IDisplayCard {
 4 
 5     @Override
 6     public void display() 
 7     {
 8         System.out.println("我是N显卡");
 9 
10     }
11 
12 }

 1 package org.hanqi.pn0120;
 2 
 3 public class Ati implements IDisplayCard {
 4 
 5     @Override
 6     public void display() 
 7     {
 8         System.out.println("我是A显卡");
 9 
10     }
11 
12 }

 1 package org.hanqi.pn0120;
 2 
 3 public class AMD2 implements ICPU, IDisplayCard {
 4 
 5     @Override
 6     public void display() 
 7     {
 8         System.out.println("AMD的CPU显卡");
 9 
10     }
11 
12     @Override
13     public void command() 
14     {
15         System.out.println("AMD自带显卡的CPU");
16 
17     }
18 
19 }

 1 package org.hanqi.pn0120;
 2 
 3 public class AMD3 extends AMD implements IDisplayCard {
 4 
 5     @Override
 6     public void display() {
 7         // TODO 自动生成的方法存根
 8         System.out.println("继承了AMD一代的CPU，增加了显卡功能");
 9 
10     }
11 
12 }