设计模式｜享元模式

1package com.elltor.designpattern.Flyweight;
2
3public interface Flyweight {
4    void operation(int i);
5}

1package com.elltor.designpattern.Flyweight;
2
3public class ConcreteFlyweight implements Flyweight {
4
5    @Override
6    public void operation(int i) {
7        System.out.println("具体的享元对象: "+i);
8    }
9}

 1package com.elltor.designpattern.Flyweight;
 2
 3import java.util.HashMap;
 4
 5public class FlyweightFcatory {
 6    private HashMap<String,ConcreteFlyweight> flyweightMap = new HashMap<>();
 7
 8    public FlyweightFcatory() {
 9        flyweightMap.put("A",new ConcreteFlyweight());
10        flyweightMap.put("B",new ConcreteFlyweight());
11        flyweightMap.put("C",new ConcreteFlyweight());
12        flyweightMap.put("D",new ConcreteFlyweight());
13        flyweightMap.put("E",new ConcreteFlyweight());
14    }
15
16    public Flyweight getFlyweight(String key){
17        return flyweightMap.get(key);
18    }
19}

1package com.elltor.designpattern.Flyweight;
2
3public class UnsharedFlyweight implements Flyweight {
4    @Override
5    public void operation(int i) {
6        System.out.println("不被共享的享元对象: "+i);
7    }
8}

 1package com.elltor.designpattern.Flyweight;
 2
 3public class Main {
 4    public static void main(String[] args) {
 5        int i = 100;
 6        FlyweightFcatory factory = new FlyweightFcatory();
 7
 8        Flyweight flyweightA = factory.getFlyweight("A");
 9        flyweightA.operation(i);
10
11        Flyweight flyweightB = factory.getFlyweight("B");
12        flyweightB.operation(i*2);
13
14        Flyweight flyweightC = factory.getFlyweight("C");
15        flyweightC.operation(i*3);
16
17        Flyweight flyweightD = factory.getFlyweight("D");
18        flyweightD.operation(i*4);
19
20        Flyweight flyweightE = factory.getFlyweight("E");
21        flyweightE.operation(i*5);
22    }
23
24}
25//打印结果
26具体的享元对象: 100
27具体的享元对象: 200
28具体的享元对象: 300
29具体的享元对象: 400
30具体的享元对象: 500