实战项目 - 零钱通.md

零钱通

• 使用java开发零钱通项目， 可以完成收益入账，消费，查看明细，退出系统等功能

  package moneyStorage;
  
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Scanner;
  
  
  public class SysOOP {
      Scanner scanner = new Scanner(System.in);
      boolean loop = true; // switch的循环
      String command = ""; // 1～4的命令, scanner
      String detailsTitle = "=====Details About Your Money=====";
      String detailsTitleCopy = "=====Details About Your Money=====";
      double money = 0;
      double getMoney = 0;
      double spendMoney = 0;
  
      String spendMoneyNote = "";
      time time = new time();
      String timeNow = time.time;
  
  
      public void mainMenu(){
          do {
              System.out.println("\n================Menu===============");
              System.out.println("\t\t\t1 Details");
              System.out.println("\t\t\t2 Spend");
              System.out.println("\t\t\t3 Get");
              System.out.println("\t\t\t4 Quit");
  
              System.out.print("Please Choose(1-4): ");
              command = scanner.next();
              switch (command) {
                  case "1":
                      this.details();
                      break;
                  case "2":
                      this.SpendMoney();
                      break;
                  case "3":
                      this.GetMoney();
                      break;
                  case "4":
                      this.Quit();
                      break;
              }
          } while (loop);
      }
  
      public void details(){
          System.out.println("-----details-----");
          if (detailsTitle.equals(detailsTitleCopy)){
              System.out.println("You do not have any activities yet");
          } else System.out.println(detailsTitle);
      }
  
      public void SpendMoney(){
          System.out.println("-----Spend Money-----");
          System.out.print("How much do you need to spend:");
          spendMoney = scanner.nextDouble();
          if (spendMoney<=0 || spendMoney>=money){
              spendMoney = 0;
              System.out.println("You can's spend more money than you have");
          } else {
              System.out.print("For What: ");
              spendMoneyNote = scanner.next();
              money -= spendMoney;
              detailsTitle += "\nmoney you spent\t-" + spendMoney + "\t\t"+timeNow + "\t\t" + money + "\t" +spendMoneyNote;
              System.out.println(detailsTitle);
          }
      }
  
      public void GetMoney(){
          System.out.println("-----Get Money-----");
          System.out.print("How much money have you received: ");
          getMoney = scanner.nextDouble();
          if (getMoney<=0){
              System.out.println("You cannot have less than zero");
              getMoney =0;
          } else if (getMoney>=10000){
              System.out.println("We cannot receive so much money");
              getMoney = 0;
          }
          money += getMoney;
          detailsTitle += "\nmoney you get\t+" + getMoney + "\t\t"+timeNow + "\t\t" + money;
          System.out.println(detailsTitle);
      }
  
      public void Quit(){
          System.out.println("-----Quit-----");
          System.out.println("Are you sure you want to quit this program?\n(Y/n)");
          String yes = "y";
          String Yes = "Y";
          String no = "n";
          String quitCommand = scanner.next();
          if (quitCommand.equals(yes) || quitCommand.equals(Yes)){
              loop = false;
              System.out.println("Goodbye");
          } else if (quitCommand.equals(no)){
              loop = true;
          } else System.out.println("Please type Y/n to conform");
  
      }
  
  
      public static class time{
          Date date = new Date();
          SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          String time = dateFormat.format(date.getTime());
      }
  }

  main方法

   package moneyStorage;
   
   public class SysOOP_APP {
   	public static void main(String[] args) {
       	new SysOOP().mainMenu();
   	}
   }