本文主要是介绍JAVA语言基础实战-吃货联盟订餐系统，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
吃货联盟订餐系统
package p190;
import java.util.Scanner;
public class P190 {public static void main(String[] args) {Scanner in = new Scanner(System.in);//初始化存储数组String names[] = new String[4]; //姓名String dishMegs[] = new String[4]; //菜名int dishNum[] = new int[4]; //菜品编号int times[] = new int[4]; //送餐时间String addresses[] = new String[4]; //地址int states[] = new int[4]; //订单状态double sumPrices[] = new double[4]; //总价String dishNames[] = new String[] {"红烧带鱼", "鱼香肉丝", "时令鲜蔬"};double prices[] = new double[] {38.0, 20.0, 10.0};int praiseNums[] = new int[3]; //点赞数//判断用户输入的是否为0，退出系统int num = -1;//判断是否结束程序boolean isExit = false;//初始化两条订单信息//第1条names[0] = "张晴";dishMegs[0] = "红烧带鱼";dishNum[0] = 2;times[0] = 12;addresses[0] = "天成路207号";states[0] = 1;sumPrices[0] = 76.0;//第2条names[1] = "张晴";dishMegs[1] = "鱼香肉丝";dishNum[1] = 2;times[1] = 18;addresses[1] = "天成路207号";states[1] = 0;sumPrices[1] = 45.0;//界面初始化System.out.println("欢迎使用“吃货联盟订餐系统”");//界面需要0返回主界面//所以需要先显示界面再判断//所以用do-while循环，无论如何执行一次循环体while(true){System.out.println("**************************************************");System.out.println("1.我要订餐");System.out.println("2.查看餐袋");System.out.println("3.签收订单");System.out.println("4.删除订单");System.out.println("5.我要点赞");System.out.println("6.退出系统");System.out.println("**************************************************");System.out.println("请选择：");boolean legal = true; num = in.nextInt();//主界面输入选择switch(num) {case 1:System.out.println("***我要订餐***");boolean isAdd = false;for(int j = 0; j < names.length; j++) {if(names[j] == null) {isAdd = true;System.out.println("请输入订餐人姓名:");String name = in.next();System.out.println("序号" + "\t" + "菜名" + "\t" + "单价" + "\t" + "点赞数");for(int i = 0; i < dishNames.length; i++) {String price = prices[i]+"元";String priaiseNum = (praiseNums[i]) > 0 ? praiseNums[i] + "赞" : "0";System.out.println(i + 1 + "\t" + dishNames[i] + "\t" + price + "\t" + priaiseNum);}System.out.println("请选择您要点的菜品编号：");int chooseDish = in.nextInt();System.out.println("请选择您需要的份数：");int chooseNumber = in.nextInt();String dishMeg = dishNames[chooseDish -1] + " " + chooseNumber + "份";double sumPrice = prices[chooseDish - 1] * chooseNumber;//订餐费满50，减5元配送费double deliCharge = (sumPrice >= 50) ? 0 : 5;System.out.println("请输入送餐时间（送餐时间是10点到20点整点送餐）：");int time = in.nextInt();while(time < 10 || time > 20) {System.out.println("您输入的时间有误，请输入10~20间的整数！");time = in.nextInt();}System.out.println("请输入送餐地址：");String address = in.next();//默认是0System.out.println("订餐成功！");System.out.println("您订的是：" + dishMeg);System.out.println("送餐时间：" + time + "点");System.out.println("餐费："+ sumPrice + "元，送餐费" + deliCharge + "元， 总计：" + (sumPrice + deliCharge) + "元。");//添加数据names[j] = name;dishMegs[j] = dishMeg;times[j] = time;addresses[j] = address;sumPrices[j] = sumPrice+ deliCharge;break;}}if(!isAdd) {System.out.println("对不起，您的餐袋已满！");}break;case 2:System.out.println("***查看餐袋***");System.out.println("序号\t订餐人\t餐品信息\t送餐日期\t送餐地址\t\t总金额\t订单状态");for(int i = 0; i < names.length; i++) {if(names[i] != null) {String state = (states[i] == 0) ? "已预定" : "已完成";String date = times[i] + "日";String sumPrice = sumPrices[i] + "元";System.out.println((i + 1) + "\t" + names[i] + "\t" + dishMegs[i] + "\t" + date + "\t" + addresses[i] + "\t" + sumPrice + "\t" + state);}}break;case 3:System.out.println("***签收订单***");boolean isSignFind = false;System.out.println("请选择要签收的订单序号：");int signOrderId = in.nextInt();for(int i = 0; i < names.length; i++) {if(names[i] != null && states[i] == 0 && signOrderId == i+1) {states[i] = 1;System.out.println("定单签收成功！");isSignFind = true;}else if(names[i] != null && states[i] == 1 && signOrderId == i+1) {System.out.println("您选择的订单已完成签收，不能再次签收！");isSignFind = true;}}if(! isSignFind) {System.out.println("您选择的订单不存在！");}break;case 4:System.out.println("***删除订单***");boolean isDelFind = false;System.out.println("请输入要删除的订单序号：");int delId = in.nextInt();for(int i = 0; i < names.length; i++) {if(names[i] != null && states[i] == 1 && delId == i + 1) {isDelFind = true;for(int j = delId-1; j < names.length - 1; j++) {names[j] = names[j+1];dishMegs[j] = dishMegs[j+1];times[j] = times[j+1];addresses[j] = addresses[j+1];states[j] = states[j+1];sumPrices[j] = sumPrices[j+1];}int endIndex = names.length - 1;names[endIndex] = null;dishMegs[endIndex] = null;times[endIndex] = 0;addresses[endIndex] = null;states[endIndex] = 0;sumPrices[endIndex] = 0;System.out.println("删除订单成功！");break;}else if(names[i] != null && states[i] == 0 && delId == i + 1) {System.out.println("您选择的订单未签收，不能删除！");isDelFind = true;break;}}if(! isDelFind) {System.out.println("您要删除的订单不存在！");}break;case 5:System.out.println("***我要点赞***");System.out.println("序号\t" + "菜名\t" + "单价\t" + "点赞数\t");for(int i = 0; i < dishNames.length; i++) {String price = prices[i] + "元";String priaiseNum = (praiseNums[i] >= 0)? praiseNums[i]+ "赞": "";System.out.println((i+1)+ "\t"+ dishNames[i]+ "\t"+ price+ "\t"+ priaiseNum);}System.out.println("请选择您要点赞的菜品序号：");int priaiseNum = in.nextInt();if(priaiseNum > 3 || priaiseNum < 0) {System.out.println("输入的序号有误！");break;}praiseNums[priaiseNum-1]++;System.out.println("点赞成功！");break;case 6:isExit = true;break;default:System.out.println("输入有误，请重新输入!");legal = false;break;}if(!legal) {continue;}if(!isExit) {System.out.println("输入0返回：");num = in.nextInt();}else {break;} }in.close();}
}
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