[设计模式]设计模式课程（十）--原型模式

 1 class MainForm : public Form
 2 {
 3     ISplitter*  prototype;//原型对象
 4 
 5 public:
 6     
 7     MainForm(ISplitter*  prototype){
 8         this->prototype=prototype;
 9     }
10     
11     void Button1_Click(){
12 
13         ISplitter * splitter=
14             prototype->clone(); //克隆原型
15         
16         splitter->split();
17             
18     }
19 };

1 //抽象类
2 class ISplitter{
3 public:
4     virtual void split()=0;
5     virtual ISplitter* clone()=0; //通过克隆自己来创建对象    
6     virtual ~ISplitter(){}
7 };

 1 //具体类
 2 class BinarySplitter : public ISplitter{
 3 public:
 4     virtual ISplitter* clone(){
 5         return new BinarySplitter(*this);
 6     }
 7 };
 8 
 9 class TxtSplitter: public ISplitter{
10 public:
11     virtual ISplitter* clone(){
12         return new TxtSplitter(*this);
13     }
14 };
15 
16 class PictureSplitter: public ISplitter{
17 public:
18     virtual ISplitter* clone(){
19         return new PictureSplitter(*this);
20     }
21 };
22 
23 class VideoSplitter: public ISplitter{
24 public:
25     virtual ISplitter* clone(){
26         return new VideoSplitter(*this);
27     }
28 };

 1 package Clone;
 2 
 3 import java.util.HashMap;
 4 import java.util.Scanner;
 5 
 6 interface Shape extends Cloneable
 7 {
 8     public Object clone();
 9     public void countArea();
10 }
11 
12 class Circle implements Shape
13 {
14     public Object clone() 
15     {
16         Circle w=null;
17         try
18         {
19             w=(Circle)super.clone();
20         }
21         catch(CloneNotSupportedException e)
22         {
23             System.out.println("拷贝圆失败!");
24         }
25         return w;
26     }
27     public void countArea()
28     {
29         int r=0;
30         System.out.print("这是一个圆，请输入半径：");
31         Scanner input=new Scanner(System.in);
32         r=input.nextInt();
33         System.out.println("该圆的面积="+3.14*r*r+"\n");
34     }
35 }
36 
37 class Square implements Shape
38 {
39     public Object clone()
40     {
41         Square b=null;
42         try
43         {
44             b=(Square)super.clone();
45         }
46         catch(CloneNotSupportedException e)
47         {
48             System.out.println("拷贝方形失败！");
49         }
50         return b;
51     }
52     public void countArea()
53     {
54         int a=0;
55         System.out.println("这是一个正方形，请输入它的边长：");
56         Scanner input=new Scanner(System.in);
57         a=input.nextInt();
58         System.out.println("该正方形的面积="+a*a+"\n");
59     }
60 }
61 
62 class ProtoTypeManager
63 {
64     private HashMap<String,Shape>ht=new HashMap<String,Shape>();
65     public ProtoTypeManager()
66     {
67         ht.put("Circle", new Circle());
68         ht.put("Square", new Square());
69     }
70     public void addshape(String key,Shape obj)
71     {
72         ht.put(key, obj);
73     }
74     public Shape getShape(String key)
75     {
76         Shape temp=ht.get(key);
77         return (Shape) temp.clone();
78     }
79 }
80 
81 public class ProtoTypeShape
82 {
83     public static void main(String[] args) {
84         ProtoTypeManager pm=new ProtoTypeManager();
85         Shape obj1=(Circle)pm.getShape("Circle");
86         obj1.countArea();
87         Shape obj2=(Square)pm.getShape("Square");
88         obj2.countArea();
89     }
90 }