在java应用程序中创建隐藏字符

我试着在开关的案例1中加入一些东西，当我添加新的pin码时，它将显示“*”而不是实际的数字

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");


    }

}
*/

---

如果您想在输入后显示，请在程序中使用以下代码

    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);

您可以在以密码格式从用户获取输入信息时使用此选项

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

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

---

注意：

cosole.readPassword（）

在IDE中可能不起作用，您必须通过控制台运行程序。

为什么要标记JavaScript？我想到了一些更简单的东西，比如System.out.println（“输入新Pin:”）；pin=reg.nextInt（）；您想在显示时在输入级或输出级显示它吗？