具体如下：

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id        if (!map.containsKey(id)) {            // 没有匹配id            return false;        } else {            // 有匹配的id            return 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id            System.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> entrySet = map.entrySet();        Iterator> iter = entrySet.iterator();        while (iter.hasNext()) {            Map.Entry 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id                System.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id                System.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id                System.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id                System.out.println("对不起，此商品不存在！");                break;            }        }    }    public static void main(String[] args) {        // TODO Auto-generated method stub        TestGoods1 t = new TestGoods1();        t.get();        //t.add();    //    t.show();    //    t.inStore();        t.show();        t.outStore();        t.show();    }}