标签：Java String 项目 练习 System States println public out

目录

• 练习项目
  • 1.点菜系统
  • 2.疫情健康管理系统

练习项目

1.点菜系统

• 界面：

  

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代码：

public class OrderName {
    int id;//编号
    String orderName;//菜名
    Double orderPrice;//价格

    public OrderName(int id, String orderName, Double orderPrice) {
        this.id = id;
        this.orderName = orderName;
        this.orderPrice = orderPrice;
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class OrderMain{
    //菜单
    static List<OrderName> list = new ArrayList<>();
    //已点菜品
    static List<OrderName> list1 = new ArrayList<>();
    //钱
    static double yuan=0;
    public static void main(String[] args) {
        initOrder();
        outer:while (true){
            mainMenu();
            Scanner scanner = new Scanner(System.in);
            int serialNumber = scanner.nextInt();
            switch (serialNumber){
                case 0:
                    //主菜单
                    mainMenu();
                    break;
                case 1:
                    //菜单
                    menu();
                    while (true){
                        int serialNumber1 = scanner.nextInt();
                        if (serialNumber1==0){
                            continue outer;
                        }
                        OrderName orderName = list.get(serialNumber1 - 1);
                        System.out.println("您已点："+orderName.orderName);
                        list1.add(orderName);
                    }
                case 2:
                    //已点菜品
                    haveSome();
                    int serialNumber2 = scanner.nextInt();
                    if (serialNumber2==0){
                        continue outer;
                    }
                case 3:
                    //买单
                    pay();
                    return;
            }
            scanner.close();
        }

    }
    //菜品
    public static void initOrder(){
        OrderName orderName1 = new OrderName(1, "鱼香肉丝", 16d);
        OrderName orderName2 = new OrderName(2, "宫保鸡丁", 16d);
        OrderName orderName3 = new OrderName(3, "口水鸡", 30d);
        OrderName orderName4 = new OrderName(4, "地三鲜", 28d);
        OrderName orderName5 = new OrderName(5, "炖王八", 59d);
        list.add(orderName1);
        list.add(orderName2);
        list.add(orderName3);
        list.add(orderName4);
        list.add(orderName5);
    }
    //主菜单
    public static void mainMenu(){
        System.out.println("----主菜单----");
        System.out.println("菜单\t\t\t1");
        System.out.println("已点菜品\t\t2");
        System.out.println("买单\t\t\t3");
        System.out.println("----按0返回主菜单----");
    }
    //菜单
    public static void menu(){
        System.out.println("----请您点菜----");
        for (int i = 0; i < list.size(); i++) {
            OrderName order = list.get(i);
            System.out.println(order.id+"\t"+order.orderName+"\t"+ order.orderPrice);
        }
        System.out.println("----序列号点菜,按0返回主菜单----");
    }
    //已点菜品
    public static void haveSome(){
        System.out.println("----您已点----");
        for (int i = 0; i < list1.size(); i++) {
            OrderName order = list1.get(i);
            System.out.println(order.id+"\t"+order.orderName+"\t"+ order.orderPrice);
        }
        System.out.println("----按0返回主菜单----");
    }
    //买单
    public static void pay(){
        System.out.println("----正在结账----");
        for (int i = 0; i < list1.size(); i++) {
            OrderName order = list1.get(i);
            yuan+=order.orderPrice;
        }
        System.out.println("共消费了："+yuan+"元");
    }

}

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2.疫情健康管理系统

界面：

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public class Message {
    private String name;//姓名
    private String sex;//性别
    private int age;//年龄
    private long idCard;//身份证
    private String time;//时间

    public Message() {
    }

    public Message(String name, String sex, int age, long idCard, String time) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.idCard = idCard;
        this.time = time;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public long getIdCard() {
        return idCard;
    }

    public void setIdCard(long idCard) {
        this.idCard = idCard;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }
}

public class State extends Message{
    private String healthState;//健康码状态
    private String tripState;//行程码状态
    private String region;//途径地区

    public State() {
    }

    public State(String healthState, String tripState, String region) {
        this.healthState = healthState;
        this.tripState = tripState;
        this.region = region;
    }

    public String getHealthState() {
        return healthState;
    }

    public void setHealthState(String healthState) {
        this.healthState = healthState;
    }

    public String getTripState() {
        return tripState;
    }

    public void setTripState(String tripState) {
        this.tripState = tripState;
    }

    public String getRegion() {
        return region;
    }

    public void setRegion(String region) {
        this.region = region;
    }

}

import java.text.DateFormat;
import java.util.Date;
import java.util.Scanner;

public class EpidemicSystem {
    private State[] States;
    boolean isExit;

    public EpidemicSystem() {
    }

    public EpidemicSystem(State[] states) {
        States = states;
    }

    public State[] getStates() {
        return States;
    }

    public void setStates(State[] states) {
        States = states;
    }

    Scanner scanner=new Scanner(System.in);
    //菜单
    public void menu(){
        System.out.println("欢迎使用疫情健康管理系统");
        while (true){
            System.out.print("1.来访登记\t");
            System.out.print("2.修改健康码\t");
            System.out.print("3.修改行程码\t");
            System.out.print("4.删除来访记录\t");
            System.out.print("5.查看来访信息\t");
            System.out.println("0.退出");
            int choose = scanner.nextInt();
            isExit=false;
            switch (choose){
                case 1:{
                    add();
                    break;
                }
                case 2:{
                    updateHealth();
                    break;
                }
                case 3:{
                    updateTrip();
                    break;
                }
                case 4:{
                    delete();
                    break;
                }
                case 5:{
                    check();
                    break;
                }
                case 0:{
                    isExit=true;
                    scanner.close();
                    return;
                }
                default:{
                    System.out.println("输入错误");
                }
            }

        }
    }
    //增加
    public void add(){
        for (int i = 0; i < States.length; i++) {
            if (States[i]==null){
                State state = new State();
                System.out.println("请输入访客姓名：");
                state.setName(scanner.next());
                System.out.println("请输入访客性别：");
                state.setSex(scanner.next());
                System.out.println("请输入访客年龄：");
                state.setAge(scanner.nextInt());
                System.out.println("请输入访客身份证号：");
                state.setIdCard(scanner.nextLong());
//                System.out.println("请输入访客来访时间(yyyy-MM-dd HH:mm:ss格式)：");
                state.setTime(parseStringToDate());
                System.out.println("请输入健康码状态：");
                state.setHealthState(scanner.next());
                System.out.println("请输入行程码状态：");
                state.setTripState(scanner.next());
                System.out.println("请输入途径地区(多个地区以，分隔)：");
                state.setRegion(scanner.next());
                States[i]=state;
                return;
            }
        }
    }
    //修改健康码
    public void updateHealth(){
        System.out.println("请输入要修改的访客身份证号：");
        long idCard=printLong();
        for (int i = 0; i < States.length; i++) {
            if (States[i]!=null){
                if (States[i].getIdCard()==idCard){
                    System.out.println("请输入健康码状态：");
                    States[i].setHealthState(printString());
                    System.out.println("修改健康码成功");
                    return;
                }
            }
        }
        System.out.println("没有找到"+idCard+"身份证号");
    }
    //修改行程码
    public void updateTrip(){
        System.out.println("请输入要修改的访客身份证号：");
        long idCard=printLong();
        for (int i = 0; i < States.length; i++) {
            if (States[i]!=null){
                if (States[i].getIdCard()==idCard){
                    System.out.println("请输入行程码状态：");
                    States[i].setTripState(printString());
                    System.out.println("请输入途径地区(多个地区以，分隔)：");
                    States[i].setRegion(printString());
                    System.out.println("修改行程码成功");
                    return;
                }
            }
        }
        System.out.println("没有找到"+idCard+"身份证号");
    }
    //删除来访记录
    public void delete(){
        System.out.println("请输入要删除的访客身份证号：");
        long idCard=printLong();
        for (int i = 0; i < States.length; i++) {
            if (States[i]!=null){
                if (States[i].getIdCard()==idCard){
                    States[i]=null;
                    System.out.println("删除成功");
                    return;
                }
            }
        }
        System.out.println("没有找到"+idCard+"身份证号");
    }
    //查看来访信息
    public void check(){
        System.out.println("序号\t姓名\t性别\t年龄\t身份证号\t\t\t\t\t来访时间\t\t\t\t健康码\t行程码");
        for (int i = 0; i < States.length; i++) {
            if (States[i]!=null){
                System.out.print((i+1)+"\t");
                System.out.print(States[i].getName()+"\t");
                System.out.print(States[i].getSex()+"\t");
                System.out.print(States[i].getAge()+"\t");
                System.out.print(States[i].getIdCard()+"\t\t");
                System.out.print(States[i].getTime()+"\t");
                System.out.print(States[i].getHealthState()+"\t\t");
                System.out.print(States[i].getTripState());
                System.out.println("(途经"+States[i].getRegion()+")");
            }
        }
    }

    //获取当前时间
    public String parseStringToDate() {
        Date date = new Date();
        DateFormat formatter = DateFormat.getDateTimeInstance();
        String str = formatter.format(date);
        return str;
    }
    //输入方法
    public String printString(){
        String next = scanner.next();
        return next;
    }
    public long printLong(){
        long next = scanner.nextLong();
        return next;
    }
}

public class Demo {
    public static void main(String[] args) {
        EpidemicSystem epidemicSystem = new EpidemicSystem();
        epidemicSystem.setStates(new State[100]);
        epidemicSystem.menu();
    }
}

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标签：Java,String,项目,练习,System,States,println,public,out
来源： https://www.cnblogs.com/yingxu/p/16270466.html

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