making frame modal

Question

i have a Jframe with 2 textfields in it. now i want to make that frame a modal window, how can i do that please tell.

Answer 1

You should use a JDialog instead of a JFrame.

Answer 2

Simple Modal Dialog

From the javadoc of class Dialog

A dialog can be either modeless (the default) or modal. A modal dialog is one which blocks input to all other toplevel windows in the application, except for any windows created with the dialog as their owner.

public class AboutDialog extends JDialog implements ActionListener {
  public AboutDialog(JFrame parent, String title, String message) {
    super(parent, title, true);
    if (parent != null) {
      Dimension parentSize = parent.getSize(); 
      Point p = parent.getLocation(); 
      setLocation(p.x + parentSize.width / 4, p.y + parentSize.height / 4);
    }
    JPanel messagePane = new JPanel();
    messagePane.add(new JLabel(message));
    getContentPane().add(messagePane);
    JPanel buttonPane = new JPanel();
    JButton button = new JButton("OK"); 
    buttonPane.add(button); 
    button.addActionListener(this);
    getContentPane().add(buttonPane, BorderLayout.SOUTH);
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    pack(); 
    setVisible(true);
  }
  public void actionPerformed(ActionEvent e) {
    setVisible(false); 
    dispose(); 
  }
  public static void main(String[] a) {
    AboutDialog dlg = new AboutDialog(new JFrame(), "title", "message");
  }
}

Answer 3

see some workaround here