How to replace typed characters?

[Collinryans]

Hello, my objective is simple:

I just want the display to output "*" for every character the user types in.

For example if he wants types "password" in the program the program displays "********".

I should mention im doing this in JCreator and not in a password field box, rather just the general output box it comes with.



Just incase it maybe relevent the code im trying to implement this idea is:

import java.io.*;
import java.util.Scanner;
import java.util.Vector;

public class MedicalOrganizer {
	
	
	public static void main(String[] args) {
		
		Scanner get = new Scanner (System.in);
		Vector strUser, strPassword;
		String strLoginU, strLoginP;
		boolean blnLogged = false;
		
		strUser	 = new Vector();
		strPassword = new Vector();
		
		System.out.println ("Login...");
		
		while (blnLogged == false) {
			
			System.out.print ("\nUsername: ");
			strLoginU = get.next();
			System.out.print ("Password: ");
			strLoginP = get.next();
			
			int i = 0;
			
			try {
				DataInputStream uin = new DataInputStream(new FileInputStream("Usernames.ini"));
				DataInputStream pin = new DataInputStream(new FileInputStream("Passwords.ini"));
				while ((uin.available() != 0) && (pin.available() != 0)) {
				
					strUser.addElement(uin.readLine());
					strPassword.addElement(pin.readLine());
					
					if ((strLoginU.compareTo(String.valueOf(strUser.elementAt(i))) == 0) && (strLoginP.compareTo(String.valueOf(strPassword.elementAt(i))) == 0)) {
						blnLogged = true;
					}
					
					i++;
				}
			} catch (Exception e) {
				System.err.println (e);
			}
			
			if (blnLogged == false) {
				
				System.out.println ("\nIvalid username/password, please try again.");
			}
		}
		
		System.out.println ("\nAccess granted.");
	}
}

Thanks in advance.

[JosAH]

Hello, my objective is simple:

I just want the display to output "*" for every character the user types in.

For example if he wants types "password" in the program the program displays "********".

I should mention im doing this in JCreator and not in a password field box, rather just the general output box it comes with.

Read the API documentation for the Console class; it can read passwords for you while nothing is echoed on the console. The documentation also contains a simple example.

kind regards,

Jos

[Collinryans]

Thanks for the reply. I did look into the API just now, however I keep getting "Console not found" error.

[curmudgeon]

I'm not sure that the Console class can be used in all environments. If you're allowed to create a Swing GUI, then the answer would be trivial: use a JPasswordField.