Password screens

hello

i am currently looking at how to place a password screen or box and the beginning and end of a program. this is to give a Sign In/ Sign Out effect.

any ideas on how i can do this

Thanks

Dave

Hello Dave, now thats a rather vague question I think, what kind of program is this, are you using Swing or is it purely a console program?

// Json

a console program

Hello Dave,

Here is an example of a password prompt using Java Swing

http://javaprogrammingforums.com/images/pwdprompt.jpg

Code :

---

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
/**
 * JavaProgrammingForums.com
 * Spread the word ;)
 */
 
public class Password{
 
    // Set password here
    final static String pwd = "javaisthebest";
 
    JPanel panel;
    JTextField myPwd = new JTextField(20);
    final static String BUTTONPANEL = "";
 
 
    public void PasswordCheck(){
 
        String enteredPass = myPwd.getText();
 
        if(enteredPass.trim().equals(pwd)){
            System.out.println("Correct Password!!");        
        }
        else{
            System.out.println("Wrong Password. Try again.");
        }
    }
 
    public void addComponentToPane(Container pane) {
 
        JPanel panel1 = new JPanel();
        panel1.add(myPwd);
 
        JButton button = new JButton("Login");
        panel1.add(button);        
        button.addActionListener(new ActionListener() {
 
            public void actionPerformed(ActionEvent e)
            {
                //Execute when button is pressed
                PasswordCheck();
            }
        });      
 
        panel = new JPanel(new CardLayout());
        panel.add(panel1, BUTTONPANEL);
        pane.add(panel, BorderLayout.CENTER);
    }
 
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("Password Prompt");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        //Create and set up the content pane.
        Password password = new Password();
        password.addComponentToPane(frame.getContentPane());
 
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
 
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

---

Hello again Dave!

I missed your post saying you wanted it to be a console application. How about this?

Code :

---

import java.util.Scanner;
 
public class PasswordConsole {
 
    /**
     * JavaProgrammingForums.com
     * Spread the word ;)
     */
 
    final static String password = "javaisthebest";
 
    public static void main(String[] args) {
 
        Scanner sc = new Scanner(System.in);
        boolean on = true;
        int count = 0;
 
        System.out.println("This is a restricted area!");
 
        while(on){
        System.out.println("Enter your password: ");
 
        String enteredPass = sc.nextLine();
 
        if(enteredPass.equals(password)){
            System.out.println("Password Correct! Welcome Dave. ");
            on = false;
        }else{
            if(count == 2){
                System.out.println("BOOOOOOOOOOOOOOOOOOM");
                System.exit(0);
            }
            System.out.println("Wrong Password! System will self destruct after 3 failed attempts.");
            count++;
            }
        }
    }
}

---

Example output:

Quote:

---

This is a restricted area!
Enter your password:
javaisthebest
Password Correct! Welcome Dave.

---

Quote:

---

This is a restricted area!
Enter your password:
javaisbad
Wrong Password! System will self destruct after 3 failed attempts.
Enter your password:
ieatmonkeys
Wrong Password! System will self destruct after 3 failed attempts.
Enter your password:
damniforgotmypass
BOOOOOOOOOOOOOOOOOOM

---

Thank you very much

i have 1 last question and it concerns the time recording application that was done before (see Help Code Needed thread)

i am looking to add a method that will warn the user if there has been a sudden change by 5 minutes or above.

Thanks
Dave

Quote:

---

Originally Posted by Dave

Thank you very much

i have 1 last question and it concerns the time recording application that was done before (see Help Code Needed thread)

i am looking to add a method that will warn the user if there has been a sudden change by 5 minutes or above.

Thanks
Dave

---

No worries. If this thread is solved please mark it as solved.

Please post in your other thread and we will take it from there :)

You might want to look into Console (Java Platform SE 6)) for reading password in console. Reading it as a string is not very secure.

// Json