package com.company;
public class JJ {
public Stringname ;// 名称
public int shu;//库存
public double jia ; //价格
public int liang;//出售数量
public void jia(int index){
System.out.println(index+"\t"+name+"\t"+jia+"\t"+shu+"\t"+liang);
}
}
这个是类
package com.company;
public class YY {
JJ[]JYY =new JJ[50];
}
这个是空间
package com.company;
import java.util.Scanner;
public class PP {
YYchen =new YY();
Scannerscanner =new Scanner(System.in);
public void ja(){
JJ xiaoMi9 =new JJ();
xiaoMi9.name ="小米9";
xiaoMi9.liang =0;
xiaoMi9.jia =2799;
xiaoMi9.shu =60;
JJ xiaoMi8 =new JJ();
xiaoMi8.shu =40;
xiaoMi8.name ="小米8";
xiaoMi8.jia =2049;
xiaoMi8.liang =0;
JJ xiaoMi7 =new JJ();
xiaoMi7.liang =0;
xiaoMi7.name ="小米7";
xiaoMi7.jia =699;
xiaoMi7.shu =80;
JJ xiaoMi6 =new JJ();
xiaoMi6.shu =100;
xiaoMi6.name ="小米6";
xiaoMi6.jia =749;
xiaoMi6.liang =0;
chen.JYY[0] = xiaoMi9;
chen.JYY[1] = xiaoMi8;
chen.JYY[2] = xiaoMi7;
chen.JYY[3] = xiaoMi6;
}
public void startMenu() {
boolean flag =true;//是否继续
do {
System.out.println("欢迎使用前程商店后台管理系统");
System.out.println("-------------------------------------");
System.out.println("1. 查看商品信息");
System.out.println("2. 新增商品信息");
System.out.println("3. 删除商品信息");
System.out.println("4. 卖出商品");
System.out.println("5. 商品销售排行耪");
System.out.println("6. 退出");
System.out.println("-------------------------------------");
System.out.println("请选择执行的操作；");
int wo =scanner.nextByte();
switch (wo){
case 1:
System.out.println("查看商品信息");
Jao();
break;
case 2:
System.out.println("新增商品信息");
she();
break;
case 3:
System.out.println("删除商品信息");
ye();
break;
case 4:
System.out.println("卖出商品");
oo();
break;
case 5:
System.out.println("商品销售排行");
ppp();
break;
case 6:
System.out.println("谢谢使用！");
flag =false;
break;
default:
System.out.println("输入不符合要求请重新输入！");
break;
}
}while (flag);
}
public static void main(String[] args) {
PP JPY =new PP(); // 入口
JPY.ja();
JPY.startMenu(); // 进入一段代码的入口
}
public void Jao(){
System.out.println("编号\t名称\t价格\t库存\t售出");
for (int i=0 ; i
if (chen.JYY[i]!=null){
chen.JYY[i].jia(i+1);
}
}
}
public void she(){
System.out.println("请输入商品名称；");
String name =scanner.next();
System.out.println("请输入商品价格：");
int jia =scanner.nextByte();
System.out.println("请输入库存：");
int shu =scanner.nextByte();
JJ ji =new JJ();
ji.jia = jia;
ji.shu = shu;
ji.name = name;
ji.liang =0;
for (int i =0; i
if (chen.JYY[i]==null){
chen.JYY[i]=ji;
break;
}
}
}
public void ye(){
System.out.println("请输入商品编号：");
boolean flag =true;//是否删除成功
int kk =scanner.nextByte();
for (int i =0 ; i
if (chen.JYY[i]!=null&&(i+1)==kk){
int j = i;
while (chen.JYY[j+1]!=null){
chen.JYY[j]=chen.JYY[j+1];
j++;
}
chen.JYY[j]=null;
flag =true;
break;
}else {
flag =false;
}
}
if (flag){
System.out.println("删除成功！");
}else {
System.out.println("删除失败，请重新操作！");
}
}
public void oo(){
System.out.println("请输入你要卖出的商品名称；");
String name =scanner.next();
for (int i =0; i
if (chen.JYY[i]!=null&&chen.JYY[i].name.equals(name)){
System.out.println("请输入你要售卖的数量：");
int shou =scanner.nextInt();
chen.JYY[i].shu =chen.JYY[i].shu - shou;
chen.JYY[i].liang =chen.JYY[i].liang + shou;
}
System.out.println("售卖成功");
break;
}
}
public void ppp(){
for (int i =0 ; i
for (int j =0; j
if (chen.JYY[j]!=null&&chen.JYY[j+1]!=null){
if (chen.JYY[j].shu
JJ ok =chen.JYY[j];
chen.JYY[j] =chen.JYY[j+1];
chen.JYY[j+1] = ok;
}
}
}
}
System.out.println("排行榜");
System.out.println("名次\t销售数量\t商品名称");
for (int i=0;i
if (chen.JYY[i]!=null){
System.out.println(i+1+"\t"+chen.JYY[i].liang+"\t"+chen.JYY[i].name);
}
}
}
}
这个是商店后台的管理系统