Simple implementation of java lottery system

This article shares the specific code of java lucky draw system for your reference, the specific content is as follows

User information class

/*
 *  User information class 
 * 1. account 
 * 2. password 
 * 3. The card number 
 * 4. Whether the login 
 */

 public class User {
 public static String userName = "";
 public static String passWord = "";
 public static int cardNumber = 0;
 //  Whether the login 
 public static boolean isLogin = false;
 //  Whether or not registered 
 public static boolean isRegister = false;
 }

registered

/*
 *  registered 
 * 1. Enter account   password 
 * 2. Generate random numbers  [1000,2000]
 * 3. Save user registration information 
 * 4. Prompt successful registration 
 */

 public class Register {
 //  Registration method 
 public static void userRegister() {
  System.out.println(" Please enter the user name :");
  Scanner scanner = new Scanner(System.in);
  //  Receiving user information 
  String userName = scanner.nextLine();
  System.out.println(" Please enter your password. :");
  String passWord = scanner.nextLine();
  int num = (int)(Math.random() * 1001 + 1000);
  //  Save to the user class 
  User.userName = userName;
  User.passWord = passWord;
  User.cardNumber = num;
  //  Print registration information 
  System.out.println();
  System.out.println(" Registered successfully , Please remember your membership card number ");
  System.out.println(" The user name :" + userName);
  System.out.println(" password :" + passWord);
  System.out.println(" The card number :" + num);

  //  Save registration status 
  User.isRegister = true;
 }
 }

Log in class

/*
 *  Log in class 
 * 1. Enter your login id and password 
 * 2. And user information   matching 
 *  There are 3 A reinput opportunity 
 * 3. Login successful 
 */

 public class Login {
 //  Save the number of login failures 
 static int num = 0;
 //  Login method 
 //  Inside the static method   You need to use static member variables 
 public static boolean userLogin() {
  //  Decide whether to register or not 
  if (User.isRegister == false) {
  System.out.println(" Please register first ");
  Register.userRegister();
  //  Login failed 
  return false;
  }
  //  The input information 
  System.out.println(" The user name :");
  Scanner scanner = new Scanner(System.in);
  //  Receive information 
  String userName = scanner.nextLine();
  System.out.println(" password :");
  String passWord = scanner.nextLine();
  //  Determine the matching login information 
  if(userName.equals(User.userName) && passWord.equals(User.passWord)) {
  //  Login successful 
  System.out.println(" You are welcome " + userName);
  //  Return login results 
  return true;
  } else {
  //  Login failed 
  num++;
  //  Prompt the user for a few more chances 
  System.out.println(" Incorrect user name or password , Please re-enter !" + " And then there were " + (3 - num) + " time ");
  //  Determine that you logged in incorrectly several times 
  if (num != 3) {
   //  Continue to login 
   userLogin();
  } else {
   //  Login failed 
   System.out.println(" I'm sorry 3 Second chances are used up , Please come again tomorrow !");
   //  Reset the variable that records the number of logins 
   num = 0;  
  }
  //  If the code goes here  1 Must have failed to log in 
  return false;
  }
 }
 }

Lottery class

/*
 *  Lottery class 
 * 1. Determine whether or not to log in 
 * 2. Enter the lucky draw card number 
 *  There are 3 A second chance to enter the card number  
 * 3. Decide if you win the lottery 
 */

 public class CJ {
 //  The number of times you saved the input card number 
 static int cardNumber = 0;
 //  Draw method 
 public static void userCJ() {
  //  Determine login status 
  if (!User.isLogin) {
  //  Not logged in   Direct end method 
  System.out.println(" Please login first ");
  return;
  }
  //  Determine if the input is correct 
  if(!isCarNum()) {
  System.out.println(" You typed it incorrectly ");
  return;
  }

  //  Match the account 
  //  Save the variable whether or not you won the lottery 
  boolean isCJ = false;
  //  random 5 Number and concatenate into a string to print commas apart 
  String string = " Your lucky number of the day :";
  for (int i = 0; i < 5; i++) {
  //  random 
  int num = (int)(Math.random() * 1001 + 1000);
  //  Joining together 
  if (i < 4) {
   string = string + num + ",";
  } else {
   string = string + num;
  }
  //  Check to see if you've won 
  if (num == User.cardNumber) {
   isCJ = true;
  }
  }
  //  Print the winning number 
  System.out.println(string);
  //  Decide if you win the lottery 
  if(isCJ) {
  System.out.println(" The winning ");
  } else {
  System.out.println(" Not winning ");
  }
 }

 //  Enter the card number method 
 public static boolean isCarNum() {
  System.out.println(" Please enter the card number :");
  Scanner scanner = new Scanner(System.in);
  //  receive 
  String carNum = scanner.nextLine();
  //  turn int
  int num = Integer.parseInt(carNum);
  //  compare 
  if (User.cardNumber == num) {
  //  Match the correct 
  System.out.println(" The card number is entered correctly ");
  return true;
  } else {
  // Incorrect match 
  cardNumber++;
  System.out.println(" Enter remaining " + (3 - cardNumber) + " time ");
  if (cardNumber != 3) {
   isCarNum();
  } else {
   System.out.println("3 Second chances are used up ");
   //  Enter card number reset 
   cardNumber = 0;
  }
  return false;
  }
 }
 }

Sweepstakes (Assembly Sweepstakes logic)

/*
 *  Lottery Start class ( Assembly lottery logic )
 * 
 */

 public class CJStart {
 //  Lottery began 
 public void cjStart() {
  //  Whether to continue with the main menu 
  String isGoOn = "";
  //  Loop main menu 
  do {
  System.out.println("***** Welcome to the lottery system *****");
  System.out.println(" 1. registered ");
  System.out.println(" 2. The login ");
  System.out.println(" 3. Lucky draw ");
  System.out.println("************************");
  Scanner scanner = new Scanner(System.in);
  //  Receive menu options 
  String menuNum = scanner.nextLine();
  //  Determine options 
  chooseMenuNum(menuNum);
  //  Whether the reception continues 
  System.out.println(" Whether to continue to choose ? y/n");
  isGoOn = scanner.nextLine();
  } while (isGoOn.equals("y"));
 }

 //  Determine menu options 
 public void chooseMenuNum(String menuNum) {
  switch (menuNum) {
  case "1":
  System.out.println("[ Lanou lottery system  >  registered ]");
  System.out.println(" Please fill in your personal registration information :");
  //  Calling the registration method 
  Register.userRegister();
  break;
  case "2":
  System.out.println("[ Lanou lottery system  >  The login ]");
  //  Calling the login method   Save login status 
  boolean userLogin = Login.userLogin();
  User.isLogin = userLogin;
  break;
  case "3":
  System.out.println("[ Lanou lottery system  >  Lucky draw ]");
  //  Call the lucky draw method 
  CJ.userCJ();
  break;
  default:
  System.out.println(" Input error , Please reselect ");
  break;
  }
 }
 }

The test class

/*
 *  The test class 
 */

 public class CJTest {
 public static void main(String[] args) {
  CJStart cjStart = new CJStart();
  cjStart.cjStart();
 }
 }