超市管理系统（Java课设）

import java.util.Iterator; import java.util.List; import java.util.Scanner; public class Manage { public static List<Good> list = Good.getList(); public static Scanner scanner = new Scanner(System.in); //显示所有信息 public static void init(List<Good> list){ Good good1 = new Good("1", "可乐", "100", "3元"); Good good2 = new Good("2", "薯条", "200", "3元"); Good good3 = new Good("3", "糖果", "400", "2元"); Good good4 = new Good("4", "雪碧", "600", "3元"); list.add(good1); list.add(good2); list.add(good3); list.add(good4); } //显示所有信息 public static void show(){ try{ if (list.size()>0){ System.out.println("---------------------------------查询结果如下所示---------------------------------"); System.out.println("编号 名称 数量 价格"); for (Good Good : list) { System.out.println(Good.toString()); } }else { throw new RuntimeException("没有任何的数据信息！"); } Menu.Menu(); }catch (Exception e){ e.printStackTrace(); } } //添加 public static void add(){ try{ System.out.println("请输入编号"); String id=scanner.next(); System.out.println("请输入名称"); String name=scanner.next(); System.out.println("请输入数量"); String num=scanner.next(); System.out.println("请输入价格"); String price=scanner.next(); Good Good = new Good(id, name,num,price); list.add(Good); System.out.println("添加成功！"); Menu.Menu(); }catch (Exception e){ e.printStackTrace(); } } //更新 public static void update(){ try{ System.out.println("请输入你要更新的商品编号"); String id=scanner.next(); System.out.println("请输入名称"); String name=scanner.next(); System.out.println("请输入数量"); String num=scanner.next(); System.out.println("请输入价格"); String price=scanner.next(); Good Good = new Good(id, name,num,price); Iterator<Good> iterator = list.iterator(); while (iterator.hasNext()){ if (iterator.next().getId().equals(id)){ iterator.remove(); } } list.add(Good); System.out.println("修改成功！"); Menu.Menu(); }catch (Exception e){ e.printStackTrace(); } } //删除 public static void delete(){ try{ System.out.println("请输入删除的商品的编号"); String id = scanner.next(); Iterator<Good> iterator = list.iterator(); while (iterator.hasNext()){ if (iterator.next().getId().equals(id)){ iterator.remove(); } } System.out.println("删除成功！"); Menu.Menu(); }catch (Exception e){ e.printStackTrace(); } } }