JFormattedTextField with setDefaultButton

Question

Hello all,
I seem to be having some trouble with getting the desired behavior out of JFormattedTextField when combined with setDefault button. The text field commits after every keystroke (to maintain correct formatting) and when I'm editing I have to hit Enter twice to activate the default button, once presumably to force the commit, and a second time to activate the default button. Is there a way to get the JFormattedTextField to not consume the first Enter so it activates the default button?
Here's a small sample that shows the undesired behavior (JDK 1.5.0_05)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.NumberFormatter;
import java.text.DecimalFormat;
public class TestDefaultButton {
    private static void createAndShowGui() {
     final JFrame frame = new JFrame("Test Default Button");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        NumberFormatter idFormatter = new NumberFormatter(
                new DecimalFormat("##,###,###"));
        idFormatter.setAllowsInvalid(false);
        idFormatter.setMaximum(99999999);
        JFormattedTextField text = new JFormattedTextField(idFormatter);
        text.setColumns(10);
     JButton button = new JButton("Press me!");
     button.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
              JOptionPane.showMessageDialog(frame, "Click!", "",
                                JOptionPane.INFORMATION_MESSAGE);
     JPanel panel = new JPanel();
     panel.add(text);
     panel.add(button);
     frame.getContentPane().add(panel);
     frame.getRootPane().setDefaultButton(button);
     frame.pack();
     frame.setVisible(true);
    public static void main(String[] args) {
     SwingUtilities.invokeLater(new Runnable() {
          public void run() {
              createAndShowGui();
}If I make the formatted text field a normal text field, everything works as expected, so this is why I guess there must be some different interaction with the formatted text field.
I'd appreciate any hints on how to resolve this.
Thanks and regards,
J. Bromley

Answer 1

This occurs because the formattted text field binds Enter to an Action, whereas
the regular text field does not. You can remove this binding in the example code
with the following change:
          text.setColumns( 10 );
          for ( ActionMap map = text.getActionMap(); map != null; map = map.getParent() )
               map.remove( "notify-field-accept" );In this example, it doesn't seem to have any other effects, but in a real program,
losing the commit on enter may be problematic.