Commit b6112b1

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享元模式

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	`1`	`+package com.java.design.flyweight;`
	`2`	`+`
	`3`	`+public interface FlyWeight {`
	`4`	`+`
	`5`	`+ void showIndex(Integer index);`
	`6`	`+`
	`7`	`+}`

Lines changed: 28 additions & 0 deletions

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	`1`	`+package com.java.design.flyweight;`
	`2`	`+`
	`3`	`+import java.util.HashMap;`
	`4`	`+import java.util.Map;`
	`5`	`+`
	`6`	`+public class FlyWeightFactory {`
	`7`	`+`
	`8`	`+ private static Map<Integer, FlyWeight> map = new HashMap<Integer, FlyWeight>();`
	`9`	`+`
	`10`	`+ public FlyWeightFactory(Integer index) {`
	`11`	`+`
	`12`	`+ map.put(index, new FlyWeightImpl());`
	`13`	`+ }`
	`14`	`+`
	`15`	`+ public static FlyWeight getFlyWeight(Integer index) {`
	`16`	`+ if (!map.containsKey(index)) {`
	`17`	`+`
	`18`	`+ map.put(index, new FlyWeightImpl());`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ return map.get(index);`
	`22`	`+ }`
	`23`	`+`
	`24`	`+ public static Integer getSize() {`
	`25`	`+ return map.size();`
	`26`	`+ }`
	`27`	`+`
	`28`	`+}`

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	`1`	`+package com.java.design.flyweight;`
	`2`	`+`
	`3`	`+public class FlyWeightImpl implements FlyWeight {`
	`4`	`+`
	`5`	`+ @Override`
	`6`	`+ public void showIndex(Integer index) {`
	`7`	`+`
	`8`	`+ System.out.println("Index : " + index);`
	`9`	`+ }`
	`10`	`+}`

Lines changed: 32 additions & 0 deletions

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	`1`	`+package com.java.design.flyweight;`
	`2`	`+`
	`3`	`+/**`
	`4`	`+ * 享元模式(Flyweight Pattern) --↓↓↓---`
	`5`	`+ * 运用共享技术有效地支持大量细粒度对象的复用。系统只使用少量的对象,而这些对象都很相似,状态变化很小`
	`6`	`+ * ,可以实现对象的多次复用。由于享元模式要求能够共享的对象必须是细粒度对象,因此它又称为轻量级模式,它是一种对象结构型模式。`
	`7`	`+ *`
	`8`	`+ * @author Administrator`
	`9`	`+ *`
	`10`	`+ */`
	`11`	`+public class FlyweightPattern {`
	`12`	`+`
	`13`	`+ public static void main(String[] args) {`
	`14`	`+`
	`15`	`+ FlyWeight flyWeight = FlyWeightFactory.getFlyWeight(1);`
	`16`	`+ FlyWeight flyWeight2 = FlyWeightFactory.getFlyWeight(1);`
	`17`	`+ System.out.println("is the same ? ---> : " + (flyWeight == flyWeight2));`
	`18`	`+`
	`19`	`+ FlyWeight flyWeight3 = FlyWeightFactory.getFlyWeight(3);`
	`20`	`+ flyWeight3.showIndex(3);`
	`21`	`+`
	`22`	`+ FlyWeight flyWeight4 = FlyWeightFactory.getFlyWeight(4);`
	`23`	`+ flyWeight4.showIndex(4);`
	`24`	`+`
	`25`	`+ FlyWeight flyWeight5 = FlyWeightFactory.getFlyWeight(5);`
	`26`	`+ flyWeight5.showIndex(5);`
	`27`	`+`
	`28`	`+ System.out.println("map size is : " + FlyWeightFactory.getSize());`
	`29`	`+`
	`30`	`+ }`
	`31`	`+`
	`32`	`+}`

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