Java：实现商品的查找、添加、出库、入库

package com.jredu.oopch08;public class Goods1 {private int id;private String name;private double price;private String uom;private int balance;public Goods1(int id, String name, double price, String uom, int balance) {super();this.id = id;this.name = name;this.price = price;this.uom = uom;this.balance = balance;}public int getId() {return id;}public void setId(int id) {this.id = id;}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 getUom() {return uom;}public void setUom(String uom) {this.uom = uom;}public int getBalance() {return balance;}public void setBalance(int balance) {this.balance = balance;}}

package com.jredu.oopch08;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Scanner;import java.util.Set;public class TestGoods1 {private static Map map = new HashMap<>();private static Scanner in = new Scanner(System.in);public static void get() {Goods1 goods1 = new Goods1(1001, "脉动水蜜桃  ", 7.0, "1.5l", 50);Goods1 goods2 = new Goods1(1002, "桃李熟切片  ", 6.5, "400g", 10);Goods1 goods3 = new Goods1(1003, "吉白芝麻油  ", 9.5, "125ml", 20);Goods1 goods4 = new Goods1(1004, "雀巢奶咖啡", 1.5, "13g", 200);Goods1 goods5 = new Goods1(1005, "白玉黄豆芽  ", 2.4, "350g", 50);map.put(goods1.getId(), goods1);map.put(goods2.getId(), goods2);map.put(goods3.getId(), goods3);map.put(goods4.getId(), goods4);map.put(goods5.getId(), goods5);}public static boolean check(int id) {// 检测匹配idif (!map.containsKey(id)) {// 没有匹配idreturn false;} else {// 有匹配的idreturn true;}}public static void add() {// 新增商品System.out.println(">>新增商品");System.out.print("请输入商品编号：");int id = in.nextInt();if (new TestGoods1().check(id)) {// 有匹配的idSystem.out.println("对不起，此商品已存在！");} else {System.out.print("请输入商品名称：");String name = in.next();System.out.print("请输入商品单价：");double price = in.nextDouble();System.out.print("请输入商品单位：");String uom = in.next();System.out.print("请输入商品库存：");int balance = in.nextInt();Goods1 goods6 = new Goods1(id, name, price, uom, balance);map.put(goods6.getId(), goods6);System.out.println("新增成功！");}}public static void show() {// 显示商品信息System.out.println("商品编号\t商品名称\t\t商品单价\t单位\t数量");Set<Map.Entry<Integer, Goods1>> entrySet = map.entrySet();Iterator<Map.Entry<Integer, Goods1>> iter = entrySet.iterator();while (iter.hasNext()) {Map.Entry<Integer, Goods1> entry = iter.next();System.out.print(entry.getKey() + "\t");System.out.println(entry.getValue().getName() + "\t\t" + entry.getValue().getPrice() + "\t"+ entry.getValue().getUom() + "\t" + entry.getValue().getBalance());}}public static void inStore() {// 入库System.out.println(">>商品入库");System.out.print("请输入商品编号：");    int id = in.nextInt();    for (int i = 0; i < map.size(); i++) {    if (new TestGoods1().check(id)) {//有匹配的idSystem.out.print("请输入入库数量：");int count = in.nextInt();int c = ((Goods1) map.get(id)).getBalance()+count;((Goods1) map.get(id)).setBalance(c);break;}else{//没有匹配的idSystem.out.println("对不起，此商品不存在！");break;}}}public void outStore() {// 出库System.out.println(">>商品出库");System.out.print("请输入商品编号：");int id = in.nextInt();for (int i = 0; i < map.size(); i++) {    if (new TestGoods1().check(id)) {//有匹配的idSystem.out.print("请输入出库数量：");int count = in.nextInt();if(count>((Goods1)map.get(id)).getBalance()){System.out.println("库存不足，出库失败！");}else{int c = ((Goods1) map.get(id)).getBalance()-count;((Goods1) map.get(id)).setBalance(c);break;}}else{//没有匹配的idSystem.out.println("对不起，此商品不存在！");break;}}}public static void main(String[] args) {// TODO Auto-generated method stubTestGoods1 t = new TestGoods1();t.get();//t.add();//t.show();//t.inStore();t.show();t.outStore();t.show();}}