java 中的LinkedList实例——往冰箱放食物拿食物

package lyfPractice.src.LyfPractice;

import java.util.Iterator;
import java.util.LinkedList;

/**
 * Created by fangjiejie on 2016/12/19.
 */
public class Eat {
    public static void main(String[] args) {
        Food f1=new Food("面包",2);
        Food f2=new Food("香肠",3);
        Food f3=new Food("薯片",1);
        Food f4=new Food("牛奶",2);
        Refrigerator refrigerator=new Refrigerator();
        refrigerator.add(f1);
        refrigerator.add(f2);
        refrigerator.add(f3);
        refrigerator.add(f4);
        refrigerator.getfood("牛奶");
        refrigerator.getfood("牛奶");
        refrigerator.getfood("牛奶");
    }
}
class Refrigerator{
     LinkedList<Food> f;

    public Refrigerator() {
        f=new LinkedList<>();
    }
    void add(Food food){
        f.add(food);
    }
    void getfood(String food) {
                Iterator it = f.iterator();
                boolean flag = false;
                while (it.hasNext()) {
                    Food h = (Food) it.next();
                    if (h.getKind().equals(food) && h.getNumber() > 0) {
                        //System.out.println(h.getKind()+h.getNumber());
                        flag = true;
                        h.setNumber(h.getNumber() - 1);
                    }
                }
                if (flag==false) {
                    System.out.println("没有" + food+"了");
                } else {
                    System.out.println("已经找到了" + food);
                }
                System.out.println("冰箱中还剩下：");
                Iterator it2 = f.iterator();
                while(it2.hasNext()){
                    Food h = (Food) it2.next();
                    if (h.getNumber() > 0) {
                        System.out.println(h.getKind()+":"+h.getNumber());
                    }
                }

    }
}
class Food{
    String kind;
    int number;

    public Food(String kind, int number) {
        this.kind = kind;
        this.number = number;
    }

    public String getKind() {
        return kind;
    }
    public void setKind(String kind) {
        this.kind = kind;
    }
    public int getNumber() {
        return number;
    }
    public void setNumber(int number) {
        this.number = number;
    }
}