学习之路---java设计模式--享元模式Flyweight

重复利用对象，共享元对象

package org.example.ms.flyweight;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;


public class FlyA {
    List flyBList = new ArrayList<>();

    {
        for (int i = 0; i < 5; i++) {
            flyBList.add(new FlyB());
        }
    }

    public FlyB getFlyB() {
        for (FlyB fb : flyBList) {
            if (!fb.isLiving) {
                return fb;
            }
        }
        return new FlyB();
    }

}

class FlyB {
    public UUID id = UUID.randomUUID();
    boolean isLiving = false;

    @Override
    public String toString() {
        return "flyB{" +
                "id=" + id +
                '}';
    }
}

package org.example.ms.flyweight;


public class FlyweightTtest {

    public static void main(String[] args) {
        FlyA flyA = new FlyA();
        for (int i = 0; i < 10; i++) {
            FlyB ff = flyA.getFlyB();
            if (i % 2 == 0) {
                ff.isLiving = true;
            }
            System.out.println(ff);
        }
    }

}