Java学习笔记NO.24

T1.完成理工超市系统的商品类及其子类的定义，实现“浏览商品”及“查看商品详情”功能

（1）商品类

public class Goods {
    public String name;
    public double price;
    public  int count;
    public String desc;

    public Goods(String name, double price, int count){
        this.name=name;
        this.price=price;
        this.count=count;
    }

    @Override
    public String toString() {
        return  this.name+"\t"+this.price+"\t"+this.count;
    }
    public  void detail(){
        System.out.println("商品名称"+this.name);
        System.out.println("商品价格"+this.price);
        System.out.println("商品库存"+this.count);
        System.out.println("商品描述"+this.desc);
    }
}

（2）浏览商品部分代码

private static String[] goods=new String[50];
    private static double[] prices=new double[50];
    private static int[] count=new int[50];
    public static void goodslist(Scanner input){
        System.out.println("商品列表");
        System.out.println("==========================");
        System.out.println("编号\t 商品名称\t 单价\t 数量\t");
        for (int i = 0; i <3 ; i++) {
            System.out.println((i+1)+"\t"+goodlist[i].name+"\t"+goodlist[i].price+"\t"+goodlist[i].count);
        }
        System.out.println("==================================");
    }

    public static void initial(){
        Goods m17=new Goods("小米手机7",1999,10);
        m17.desc="小米7将采用刘海屏设计，搭载Synaptics和Goodix的屏下指纹方案，有蓝色和黑色等颜色";
        goodlist[0]=m17;

        Goods m18=new Goods("小米手机8",2199,10);
        m18.desc="搭载骁龙845处理器，拥有红外人脸识别、双频GPS等技术，具备AI双摄、光学变焦和光学防抖等功能";
        goodlist[1]=m17;

        Goods honor=new Goods("华为荣耀",2699,5);
        honor.desc="搭载了华为海思自主研发的植桥920芯片。该芯片基于28nm工艺制造，采用8核big.little GTS架构";
        goodlist[2]=honor;
    }
}

（3）查看商品详情部分代码

 case 4:
                    System.out.println("查看商品详情");
                    System.out.println("请输入需要查看的商品编号");
                    int goodNum= input.nextInt();
                    while(goodNum<1||goodNum>3){
                        System.out.println("当前输入的商品编号不合法，请重新输入");
                        goodNum= input.nextInt();
                    }
                    goodlist[goodNum-1].detail();
                    continue;