How to clear JTextField text after parent component is set `setVisible(false)`?

Question

I have added ComponentListener to JTextField parent like this:

parent.addComponentListener(new ComponentAdapter() {
    @Override
    public void componentHidden(ComponentEvent e) {
        setText("");
    }
});

So after parent becomes invisible, textField text is set to "". Everything works, but the problem is when I set parent to visible - for some milliseconds previous text of textField is displayed, and then field becomes empty. So it's not very nice..

Answer 1

Before setting the parent to invisible, textField field is set textField.setText(null); (no need to repaint), then the problem is with focus - it must be set to some initial component like panel.requestFocusInWindow();. But the focus is not always set right in time. So Timer class solved the problem:

textField.setText(null);
panel.requestFocusInWindow();

final int timeout = 5;
        Timer timer = new Timer(timeout, new ActionListener() {
            int a = 0;

            @Override
            public void actionPerformed(ActionEvent e) {
                if (panel.isFocusOwner() || a > 500) {
                    EventQueue.invokeLater(new Runnable() {
                        @Override
                        public void run() {
                            setVisible(false);
                        }
                    });
                    ((Timer) e.getSource()).stop();
                }
                a += timeout;
            }
        });
        timer.setRepeats(true);
        timer.start();

Now Dialog window (parent) if setVisible(true); shows as newly created - without blinking textFields and focused right. Finally.. :)