Java学习list集合练习二

题目

设计电商类，其中包含商品类，商品类属性（名称、价格、介绍、厂家、生产地址），继承类有食品类、电气类、服装类、玩具类。

食品类属性：有效时长、重量

电气类属性：电压、功率、重量

服装类属性：材质、面料、成分

玩具类属性：材质、分类、适用年龄

要求：

1、设计商品类，封装商品信息

2、设计继承类，继承商品类，封装继承商品信息

3、设计商城，商城中有一个各类商品的集合，客户可以看到所有商品，也可以根据不同继承类查询商品，每类商品不少以五种

4、查询商城中价格超过100元的商品

5、查询生产地是“北京”的商品

6、根据商品价格给商城排序，价格从高到低

7、设计购物车，购物车包括商品名称和商品数量，输入商品名称，显示商品信息，输入数量，加入购物车，完成添加后，输入“结账”，计算所有商品价格。

8、设计抽奖功能，查询所有商品，生成随机数，随机数范围0到商品集合长度，生成随机数后，通过下标获取商品，显示商品信息

 

解答

package homework;

public class DQ extends ShangP {
    private int V;
    private int P;
    private double weight;
    public DQ(String name, double price, String introduce, String producer, String address, int v, int p,
            double weight) {
        super(name, price, introduce, producer, address);
        V = v;
        P = p;
        this.weight = weight;
    }
    public int getV() {
package homework;

public class FZ extends ShangP {
    private String quality;
    private String inner;
    private String composition;
    public FZ(String name, double price, String introduce, String producer, String address, String quality,
            String inner, String composition) {
        super(name, price, introduce, producer, address);
        this.quality = quality;
        this.inner = inner;
        this.composition = composition;
    }
    /**
     * @return the quality
     */
    public String getQuality() {
        return quality;
    }
    /**
     * @param quality the quality to set
     */
    public void setQuality(String quality) {
        this.quality = quality;
    }
    /**
     * @return the inner
     */
    public String getInner() {
        return inner;
    }
    /**
     * @param inner the inner to set
     */
    public void setInner(String inner) {
        this.inner = inner;
    }
    /**
     * @return the composition
     */
    public String getComposition() {
        return composition;
    }
    /**
     * @param composition the composition to set
     */
    public void setComposition(String composition) {
        this.composition = composition;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "FZ [name=" + super.getName() + ", price=" + super.getPrice() + ", introduce=" + super.getIntroduce() + ", producer=" + super.getProducer()
        + ", address=" + super.getAddress() + ",quality=" + quality + ", inner=" + inner + ", composition=" + composition + "]";
    }
    
    
    
}
package homework;

public class SW extends ShangP {
    private double hour;
    private double weight;
    
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "SW [name=" + super.getName() + ", price=" + super.getPrice() + ", introduce=" + super.getIntroduce() + ", producer=" + super.getProducer()
                + ", address=" + super.getAddress() + ",hour=" + hour + ", weight=" + weight + "]";
    }
    public SW(String name, double price, String introduce, String producer, String address, double hour,
            double weight) {
        super(name, price, introduce, producer, address);
        this.hour = hour;
        this.weight = weight;
    }
    public double getHour() {
        return hour;
    }
    public void setHour(double hour) {
        this.hour = hour;
    }
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }
    
}
package homework;

public class WJ extends ShangP {
    private String quality;
    private String kind;
    private int age;
    public WJ(String name, double price, String introduce, String producer, String address, String quality, String kind,
            int age) {
        super(name, price, introduce, producer, address);
        this.quality = quality;
        this.kind = kind;
        this.age = age;
    }
    /**
     * @return the quality
     */
    public String getQuality() {
        return quality;
    }
    /**
     * @param quality the quality to set
     */
    public void setQuality(String quality) {
        this.quality = quality;
    }
    /**
     * @return the kind
     */
    public String getKind() {
        return kind;
    }
    /**
     * @param kind the kind to set
     */
    public void setKind(String kind) {
        this.kind = kind;
    }
    /**
     * @return the age
     */
    public int getAge() {
        return age;
    }
    /**
     * @param age the age to set
     */
    public void setAge(int age) {
        this.age = age;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "WJ [name=" + super.getName() + ", price=" + super.getPrice() + ", introduce=" + super.getIntroduce() + ", producer=" + super.getProducer()
        + ", address=" + super.getAddress() + ",quality=" + quality + ", kind=" + kind + ", age=" + age + "]";
    }
    
    
}
package homework;

public class ShangP implements Comparable<ShangP>{
    
    private String name;
    private double price;
    private String introduce;
    private String producer;
    private String address;
    public ShangP(String name, double price, String introduce, String producer, String address) {
        this.name = name;
        this.price = price;
        this.introduce = introduce;
        this.producer = producer;
        this.address = address;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public String getIntroduce() {
        return introduce;
    }
    public void setIntroduce(String introduce) {
        this.introduce = introduce;
    }
    public String getProducer() {
        return producer;
    }
    public void setProducer(String producer) {
        this.producer = producer;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "ShangP [name=" + name + ", price=" + price + ", introduce=" + introduce + ", producer=" + producer
                + ", address=" + address + "]";
    }
    @Override
    public int compareTo(ShangP o) {
        if(this.getPrice()>o.getPrice())
            return -1;
        else if(this.getPrice()<o.getPrice())
            return 1;
        else
            return 0;
    }
    
    
}
package homework;

public class gouwuche {
    private String name;
    private int num;
    private double price;
    public gouwuche(String name, int num, double price) {
        super();
        this.name = name;
        this.num = num;
        this.price = price;
    }
    /**
     * @return the name
     */
    public String getName() {
        return name;
    }
    /**
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }
    /**
     * @return the num
     */
    public int getNum() {
        return num;
    }
    /**
     * @param num the num to set
     */
    public void setNum(int num) {
        this.num = num;
    }
    /**
     * @return the price
     */
    public double getPrice() {
        return price;
    }
    /**
     * @param price the price to set
     */
    public void setPrice(double price) {
        this.price = price;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "gouwuche [name=" + name + ", num=" + num + ", price=" + price + "]";
    }
    
    
}
package homework;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class ShangCheng {

    public static void main(String[] args) {

        ArrayList<ShangP> list = liebiao();
        for (ShangP s : list) {
            System.out.println(s.toString());
        }
        System.out.println("**价格高于100的有**");
        for (ShangP n : list) {
            if (n.getPrice() > 100) {
                System.out.println(n);
            }
        }
        System.out.println("**产地是北京的有**");
        for (ShangP n : list) {
            if (n.getAddress().equals("北京")) {
                System.out.println(n);
            }
        }
        System.out.println("**排序**");
        Collections.sort(list);
        for (ShangP n : list) {
            System.out.println(n.toString());
        }

        System.out.println("**请购物**");

        
        double sum = 0;
//        ArrayList<gouwuche> str=new ArrayList<gouwuche>();
//        while (true) {
//            System.out.print("请输入购买物品");
//            String name = new Scanner(System.in).next();
//            System.out.print("请输入购买数量");
//            int num = new Scanner(System.in).nextInt();
//            for (ShangP l : list) {
//                if (l.getName().equals(name)) {
//                    // System.out.println(l);
//                    // sum=l.getPrice();
//                    // sum*=num;
//                    gouwuche gg = new gouwuche(name, num, l.getPrice());
//                    str.add(gg);
//                    System.out.println("是否继续购买（是/结账）");
//                    String s = new Scanner(System.in).next();
//                    if (s.equals("结账")) {
//                        for (gouwuche st:str) {
//                            sum+=st.getNum()*st.getPrice();
//                        }
//
//                        System.out.println("您需要支付" + sum);
//                    }
//                    break;
//                }
//            }
//        }
        
        chou();
    }



    public static void chou() {
        ArrayList<ShangP> list = liebiao();
        int a = (int) (Math.random()*list.size());
        
        System.out.println("抽到了"+list.get(a));
        System.out.println();

    }

    public static ArrayList<ShangP> liebiao() {
        ArrayList<ShangP> list = new ArrayList<ShangP>();
        SW a1 = new SW("食物1", 12, "好", "大龙厂", "浙江", 9, 90);
        SW a2 = new SW("食物2", 12, "好", "大龙厂", "浙江", 9, 90);
        SW a3 = new SW("食物3", 12, "好", "大龙厂", "浙江", 9, 90);
        SW a4 = new SW("食物4", 12, "好", "大龙厂", "浙江", 9, 90);
        SW a5 = new SW("食物5", 12, "好", "大龙厂", "浙江", 9, 90);
        DQ b1 = new DQ("空调1", 10000, "好", "美的", "黑龙江", 220, 2500, 300);
        DQ b2 = new DQ("空调2", 10000, "好", "美的", "黑龙江", 220, 2500, 300);
        DQ b3 = new DQ("空调3", 10000, "好", "美的", "黑龙江", 220, 2500, 300);
        DQ b4 = new DQ("空调4", 10000, "好", "美的", "黑龙江", 220, 2500, 300);
        DQ b5 = new DQ("空调5", 10000, "好", "美的", "黑龙江", 220, 2500, 300);
        FZ c1 = new FZ("巴黎世家1", 1000, "优", "巴黎世家工厂", "广州", "涤纶", "棉麻", "布，水，线");
        FZ c2 = new FZ("巴黎世家2", 1000, "优", "巴黎世家工厂", "广州", "涤纶", "棉麻", "布，水，线");
        FZ c3 = new FZ("巴黎世家3", 1000, "优", "巴黎世家工厂", "广州", "涤纶", "棉麻", "布，水，线");
        FZ c4 = new FZ("巴黎世家4", 1000, "优", "巴黎世家工厂", "广州", "涤纶", "棉麻", "布，水，线");
        FZ c5 = new FZ("巴黎世家5", 1000, "优", "巴黎世家工厂", "北京", "涤纶", "棉麻", "布，水，线");
        WJ d1 = new WJ("泡泡机1", 200, "差", "江南皮革厂", "江苏", "皮革", "益智玩具", 3);
        WJ d2 = new WJ("泡泡机2", 200, "差", "江南皮革厂", "北京", "皮革", "益智玩具", 3);
        WJ d3 = new WJ("泡泡机3", 200, "差", "江南皮革厂", "江苏", "皮革", "益智玩具", 3);
        WJ d4 = new WJ("泡泡机4", 200, "差", "江南皮革厂", "江苏", "皮革", "益智玩具", 3);
        WJ d5 = new WJ("泡泡机5", 200, "差", "江南皮革厂", "江苏", "皮革", "益智玩具", 3);
        list.add(a1);
        list.add(a2);
        list.add(a3);
        list.add(a4);
        list.add(a5);
        list.add(b1);
        list.add(b2);
        list.add(b3);
        list.add(b4);
        list.add(b5);
        list.add(c1);
        list.add(c2);
        list.add(c3);
        list.add(c4);
        list.add(c5);
        list.add(d1);
        list.add(d2);
        list.add(d3);
        list.add(d4);
        list.add(d5);
        return list;
    }
}
    }
    public void setV(int v) {
        V = v;
    }
    public int getP() {
        return P;
    }
    public void setP(int p) {
        P = p;
    }
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }
    @Override
    public String toString() {
        return "DQ [name=" + super.getName() + ", price=" + super.getPrice() + ", introduce=" + super.getIntroduce() + ", producer=" + super.getProducer()
        + ", address=" + super.getAddress() + ",V=" + V + ", P=" + P + ", weight=" + weight + "]";
    }
    
}