java設計模式之享元模式

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定義一個公用的內部

public interface ClessFlyWeight {
void setColor(String c);
String getColor();
void display(Coordinate c);
}
class ConcreteChess implements ClessFlyWeight{

private String color;

public ConcreteChess(String color) {
super();
this.color = color;
}

@Override
public String getColor() {
// TODO Auto-generated method stub
return color;
}

 

@Override
public void setColor(String c) {
// TODO Auto-generated method stub
this.color=c;
}

@Override
public void display(Coordinate c) {
// TODO Auto-generated method stub
System.out.println("棋子顏色"+color);
System.out.println("棋子位置："+c.getX()+c.getY());
}

}

 

定義享元工廠

/**
*
* 享元工廠類
* @author zzdxw
*
*/
public class ClessFlyWeightFactory {
//享元池
private static Map<String, ClessFlyWeight> map=new HashMap<String ,ClessFlyWeight>();
public static ClessFlyWeight getChess(String color){
if(map.get(color)!=null){
return map.get(color);
}else{
ClessFlyWeight cfw=new ConcreteChess(color);
map.put(color,cfw);
return cfw;
}
}
}

//定義一個外部的

public class Coordinate {
private int x,y;

public Coordinate(int x, int y) {
super();
this.x = x;
this.y = y;
}

public int getX() {
return x;
}

public void setX(int x) {
this.x = x;
}

public int getY() {
return y;
}

public void setY(int y) {
this.y = y;
}

}

//用戶端測試一下

 

public class Client {
public static void main(String[] args) {
ClessFlyWeight chess1=ClessFlyWeightFactory.getChess("黑色");
ClessFlyWeight chess2=ClessFlyWeightFactory.getChess("黑色");
System.out.println(chess1);
System.out.println(chess2);
}
}

java設計模式之享元模式