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StackOverflow2013
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    <p>Here is an example of a Login Dialog. Closes entire program with close of Dialog.</p> <blockquote> <p>Username: <b><code>stackoverflow</code></b> Password: <b><code>stackoverflow</code></b></p> </blockquote> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; public class TestFrame extends JFrame { private PassWordDialog passDialog; public TestFrame() { passDialog = new PassWordDialog(this, true); passDialog.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { JFrame frame = new TestFrame(); frame.getContentPane().setBackground(Color.BLACK); frame.setTitle("Logged In"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLocationRelativeTo(null); frame.setExtendedState(JFrame.MAXIMIZED_BOTH); } }); } } class PassWordDialog extends JDialog { private final JLabel jlblUsername = new JLabel("Username"); private final JLabel jlblPassword = new JLabel("Password"); private final JTextField jtfUsername = new JTextField(15); private final JPasswordField jpfPassword = new JPasswordField(); private final JButton jbtOk = new JButton("Login"); private final JButton jbtCancel = new JButton("Cancel"); private final JLabel jlblStatus = new JLabel(" "); public PassWordDialog() { this(null, true); } public PassWordDialog(final JFrame parent, boolean modal) { super(parent, modal); JPanel p3 = new JPanel(new GridLayout(2, 1)); p3.add(jlblUsername); p3.add(jlblPassword); JPanel p4 = new JPanel(new GridLayout(2, 1)); p4.add(jtfUsername); p4.add(jpfPassword); JPanel p1 = new JPanel(); p1.add(p3); p1.add(p4); JPanel p2 = new JPanel(); p2.add(jbtOk); p2.add(jbtCancel); JPanel p5 = new JPanel(new BorderLayout()); p5.add(p2, BorderLayout.CENTER); p5.add(jlblStatus, BorderLayout.NORTH); jlblStatus.setForeground(Color.RED); jlblStatus.setHorizontalAlignment(SwingConstants.CENTER); setLayout(new BorderLayout()); add(p1, BorderLayout.CENTER); add(p5, BorderLayout.SOUTH); pack(); setLocationRelativeTo(null); setDefaultCloseOperation(DISPOSE_ON_CLOSE); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); jbtOk.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if ("stackoverflow".equals(String.valueOf(jpfPassword.getPassword())) &amp;&amp; "stackoverflow".equals(jtfUsername.getText())) { parent.setVisible(true); setVisible(false); } else { jlblStatus.setText("Invalid username or password"); } } }); jbtCancel.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { setVisible(false); parent.dispose(); System.exit(0); } }); } } </code></pre>
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    1. POHow can I add a login screen to an existing Java Swing program?
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    1. USsdoxsee
    1. USPaul Samsotha
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