创建Java应用程序中

Question

我试着去把东西的情况下，1的开关隐藏角色，当我添加新的PIN码，将显示“*”，而不是实际的数量

import java.util.Scanner; 

public class Main { 

    public Main() { 

    } 

    public static void main(String[] args) { 
     Scanner in = new Scanner(System.in); 

     int userChoice; 
     boolean quit = false; 
     System.out.println("Welcome to GNBanking"); 
     System.out.println("Please Create Your Account"); 
     String name; 
     String add; 
     int contact; 
     double initialdep; 
     int pin; 
     int random = (int)(Math.random() * 999999 + 1); 

     Scanner reg = new Scanner (System.in); 
     System.out.println("Please Fill out the information below"); 
     System.out.println("Enter Your Name: "); 
     name = reg.nextLine(); 
     System.out.println("Enter Your Address: "); 
     add = reg.nextLine(); 
     System.out.println("Enter Your Contact Number: "); 
     contact = reg.nextInt(); 
     System.out.println("Enter Your Initial Deposit"); 
     initialdep = reg.nextInt(); 
     System.out.println("Enter Your Pin: "); 
     pin = reg.nextInt(); 

     System.out.println("Congratulations You Are Now A Member Of GNBanking Please Confirm Your Account"); 


     System.out.println("Name of Member: " +name); 
     System.out.println("Address: "+ add); 
     System.out.println("Contact Number:" +contact); 
     System.out.println("Initial Deposit: "+initialdep); 
     System.out.println("Pin " + pin); 
     System.out.println("Is the Information Accurate? Y/N "); 
     String choice =reg.next(); 
     if(choice.equalsIgnoreCase("Y")){ 
      System.out.println("Excellent!!"); 
      System.out.println("Your Account Number is: "+ random); 
      System.out.println("Name of Member: " +name); 
      System.out.println("Address: "+ add); 
      System.out.println("Contact Number:" +contact); 
      System.out.println("Initial Deposit: "+initialdep); 
      System.out.println("Pin: " + pin); 
     }else if(choice.equalsIgnoreCase("N")){ 
       System.out.println("Do You Want to try again? Y/N"); 
      String secchoi = reg.next(); 
      if(secchoi.equalsIgnoreCase("Y")){ 
      main (null); 
      }else if (secchoi.equalsIgnoreCase("N")){ 
       System.out.println("Have A Nice Day!"); 
      } 


    }  
     do { 
       System.out.println("[1] Change Pincode"); 
       System.out.println("[2] View Balance"); 
       System.out.println("[3] Deposit Money"); 
       System.out.println("[4] Withdraw "); 
       System.out.println("[5] Close Account"); 
       userChoice = in.nextInt(); 
       switch (userChoice) { 
       case 1: 
        // Here Im trying to create a change pin that wont show the int but rather the character "*" when I type 
        break; 
       case 2: 
        // View Balance 
        break; 
       case 3: 
        // Deposit 
        break; 
       case 4: 
        // Withdraw 
        break; 
       case 5: 
        quit = true; 
        break; 
       default: 
        System.out.println("Wrong choice."); 
        break; 
       } 
       System.out.println(); 
     } while (!quit); 
     System.out.println("Have A Nice Day"); 


    } 

} 
*/ 

Answer 1

使用下面的代码程序，如果你想在输入后显示它。

int value=1234567780; //Your pincode 
    String data=String.valueOf(value).replaceAll("[0-9]", "*"); //replacing and storing it into new String variable 
    System.out.println(data); 

这个可以在用户输入密码格式时使用。

System.out.println("Please Enter your pincode: "); 

char[] pinCode= cosole.readPassword(); 
String data = new String(pinCode); 

注：的cosole.readPassword()可能无法在IDE中工作，你必须运行通过控制台PROGRAMM。