javase 超市库存系统

package com.oracle.demo01;

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

public class Demo01 {
    public static void main(String[] args) {
        System.out.println("=========================欢迎光临   oracle 超市======================");
        System.out.println("1:货物清单 2:添加新货物 3:删除货物 4:修改货物");
        System.out.println("5:退出系统");
        System.out.println("请您输入要操作的功能序号");
        System.out.println("--------------");
        while(true){
            System.out.println("1:货物清单 2:添加新货物 3:删除货物 4:修改货物");
            System.out.println("5:退出系统");
            System.out.println("请您输入要操作的功能序号");
            Scanner sc = new Scanner(System.in);
            int num = sc.nextInt();
            switch (num) {
            case 1:
                f1();
                break;
            case 2:
                f2();
                break;
            case 3:
                f3();
                break;
            case 4:
                f4();
                break;
            case 5:
                return;
            default:
                System.out.println("您输入的有误");
                break;
            }
        }

    }

    public static void f1() {
        ArrayList<chaoshi> arr = new ArrayList<chaoshi>();
        chaoshi c1 = new chaoshi();
        c1.spbh = 9001;
        c1.spm = "少林寺酥饼核桃";
        c1.jiage = 120.0;
        arr.add(c1);
        chaoshi c2 = new chaoshi();
        c2.spbh = 9002;
        c2.spm = "尚康杂粮牡丹饼";
        c2.jiage = 20.0;
        arr.add(c2);
        chaoshi c3 = new chaoshi();
        c3.spbh = 9003;
        c3.spm = "新疆原产哈密瓜";
        c3.jiage = 7.0;
        arr.add(c3);
        System.out.println("商品编号" + "\t" + "商品名称" + "\t" + "\t" + "商品单价");
        for (int i = 0; i < arr.size(); i++) {
            System.out.println(arr.get(i).spbh + "\t" + arr.get(i).spm + "\t" + arr.get(i).jiage);
        }
    }

    public static void f2() {
        ArrayList<chaoshi> arr = new ArrayList<chaoshi>();
        chaoshi c4 = new chaoshi();
        System.out.println("输入新水果的名称:");
        Scanner mz = new Scanner(System.in);
        String sg = mz.next();
        c4.spm = sg;
        System.out.println("输入新水果的编号:");
        int sg1 = mz.nextInt();
        c4.spbh = sg1;
        System.out.println("输入新水果的价格:");
        int sg2 = mz.nextInt();
        c4.jiage = sg2;
        arr.add(c4);
        chaoshi c1 = new chaoshi();
        c1.spbh = 9001;
        c1.spm = "少林寺酥饼核桃";
        c1.jiage = 120.0;
        arr.add(c1);
        chaoshi c2 = new chaoshi();
        c2.spbh = 9002;
        c2.spm = "尚康杂粮牡丹饼";
        c2.jiage = 20.0;
        arr.add(c2);
        chaoshi c3 = new chaoshi();
        c3.spbh = 9003;
        c3.spm = "新疆原产哈密瓜";
        c3.jiage = 7.0;
        arr.add(c3);
        System.out.println("商品编号" + "\t" + "商品名称" + "\t" + "\t" + "商品单价");
        for (int i = 0; i < arr.size(); i++) {
            System.out.println(arr.get(i).spbh + "\t" + arr.get(i).spm + "\t" + arr.get(i).jiage);
        }
    }

    public static void f3() {
        System.out.println("输入您要删除的商品编号");
        Scanner sc = new Scanner(System.in);
        int sc1 = sc.nextInt();
        ArrayList<chaoshi> arr = new ArrayList<chaoshi>();
        chaoshi c1 = new chaoshi();
        c1.spbh = 9001;
        c1.spm = "少林寺酥饼核桃";
        c1.jiage = 120.0;
        arr.add(c1);
        chaoshi c2 = new chaoshi();
        c2.spbh = 9002;
        c2.spm = "尚康杂粮牡丹饼";
        c2.jiage = 20.0;
        arr.add(c2);
        chaoshi c3 = new chaoshi();
        c3.spbh = 9003;
        c3.spm = "新疆原产哈密瓜";
        c3.jiage = 7.0;
        arr.add(c3);
        if (sc1 == 9001) {
            arr.remove(0);
        }
        if (sc1 == 9002) {
            arr.remove(1);
        }
        if (sc1 == 9003) {
            arr.remove(2);
        }
        System.out.println("商品编号" + "\t" + "商品名称" + "\t" + "\t" + "商品单价");
        for (int i = 0; i < arr.size(); i++) {
            System.out.println(arr.get(i).spbh + "\t" + arr.get(i).spm + "\t" + arr.get(i).jiage);
        }
    }

    public static void f4() {
        ArrayList<chaoshi> arr = new ArrayList<chaoshi>();
        chaoshi c1 = new chaoshi();
        c1.spbh = 9001;
        c1.spm = "少林寺酥饼核桃";
        c1.jiage = 120.0;
        arr.add(c1);
        chaoshi c2 = new chaoshi();
        c2.spbh = 9002;
        c2.spm = "尚康杂粮牡丹饼";
        c2.jiage = 20.0;
        arr.add(c2);
        chaoshi c3 = new chaoshi();
        c3.spbh = 9003;
        c3.spm = "新疆原产哈密瓜";
        c3.jiage = 7.0;
        arr.add(c3);
        System.out.println("输入您要修改的商品编码:");
        Scanner xg = new Scanner(System.in);
        int g1 = xg.nextInt();
        System.out.println("输入新的商品编码");
        int g2 = xg.nextInt();
        System.out.println("输入新的水果名称");
        String g3 = xg.next();
        System.out.println("输入新的水果价格");
        int g4 = xg.nextInt();
        if (g1 == 9001) {
            c1.spbh = g2;
            c1.spm = g3;
            c1.jiage = g4;
        }
        if (g1 == 9002) {
            c2.spbh = g2;
            c2.spm = g3;
            c2.jiage = g4;
        }
        if (g1 == 9003) {
            c3.spbh = g2;
            c3.spm = g3;
            c3.jiage = g4;
        }
        System.out.println("商品编号" + "\t" + "商品名称" + "\t" + "\t" + "商品单价");
        for (int i = 0; i < arr.size(); i++) {
            System.out.println(arr.get(i).spbh + "\t" + arr.get(i).spm + "\t" + arr.get(i).jiage);
        }
    }
}