package gui;

/**

* RUN:

* javac -cp .; gui/InputPassword.java && java -cp .; gui.InputPassword

* OUTPUT:

*

*/

import javax.swing.*;

import javax.swing.event.*;

import java.awt.*;

import java.awt.event.*;

import java.util.Arrays;

import net.mindview.util.*;

public class InputPassword extends JFrame {

private static final int WIDTH = 400;

private static final int HEIHGT = 250;

private char[] correctPassword = {'p', 'a', 's', 's', 'w', 'o', 'r', 'd'};

private JPasswordField pwd = new JPasswordField(15);

private ActionListener pwdListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

char[] input = pwd.getPassword();

if (isPasswordCorrect(input)) {

JOptionPane.showMessageDialog(InputPassword.this,

"Success! You typed the right password.");

} else {

JOptionPane.showMessageDialog(InputPassword.this,

"Invalid password. Try again.",

"Error Message",

JOptionPane.ERROR_MESSAGE);

}

//Zero out the possible password, for security.

Arrays.fill(input, '0');

pwd.selectAll();

resetFocus();

}

};

private boolean isPasswordCorrect(char[] input) {

boolean isCorrect = true;

if (input.length != correctPassword.length) {

isCorrect = false;

} else {

isCorrect = Arrays.equals(input, correctPassword);

}

return isCorrect;

}

protected void resetFocus() {

pwd.requestFocusInWindow();

}

public InputPassword() {

setLayout(new FlowLayout());

JLabel label = new JLabel("Enter password");

add(label);

add(pwd);

pwd.addActionListener(pwdListener);

}

public static void main(String[] args) {

SwingConsole.run(new InputPassword(), WIDTH, HEIHGT);

}

}