Enter in JDialog

Question

Hello friends !
I have JDialog with some JLabels, JSpinners and one JButton.
The JSpinners are numerical, i.e. if I type say "bla bla" in it, I hear a beep. Only when enter a number JSpinner accepts it.
When I click the JButton, loadPicture() called.
I want that if I press Enter after (enter some number in the JSpinner), loadPicture() will be called.
What should I add ?
Below is the code of the JDialog.
Thanks in advance !!!
public class JCRandomCrosswordDialog extends JDialog implements ActionListener {
     private JCFrame mainFrame;
     private JTextField fillingPercentageField;
     private JSpinner rowsSpinner, columnsSpinner;
     private JButton createButton = new JButton("Create random crossword");
     public JCRandomCrosswordDialog(JCFrame mainFrame) {
            super(mainFrame, "Create random crossword", true);
            this.mainFrame = mainFrame;
            rowsSpinner = new JSpinner(new SpinnerNumberModel(mainFrame.getDefaultNumberOfRows(), 1, mainFrame.getMaxNumberOfRows(), 1));
            columnsSpinner = new JSpinner(new SpinnerNumberModel(mainFrame.getDefaultNumberOfColumns(), 1, mainFrame.getMaxNumberOfColumns(), 1));
            fillingPercentageField = new JTextField(String.valueOf(mainFrame.getDefaultPercentageOfFilling()));
            ((JSpinner.DefaultEditor)(rowsSpinner.getEditor())).getTextField().setHorizontalAlignment(JTextField.LEFT);
            ((JSpinner.DefaultEditor)(columnsSpinner.getEditor())).getTextField().setHorizontalAlignment(JTextField.LEFT);
            JCToolkit.setSelectAllFieldText(((JSpinner.DefaultEditor)(rowsSpinner.getEditor())).getTextField());
            JCToolkit.setSelectAllFieldText(((JSpinner.DefaultEditor)(columnsSpinner.getEditor())).getTextField());
            JCToolkit.setSelectAllFieldText(fillingPercentageField);
            Container contentPane = getContentPane();
            JPanel dialogPanel = new JPanel();
         dialogPanel.setLayout(new GridLayout(3, 2));
         dialogPanel.add(new JLabel("  Number of rows:", JLabel.LEFT));
         dialogPanel.add(rowsSpinner);
         dialogPanel.add(new JLabel("  Number of columns:", JLabel.LEFT));
         dialogPanel.add(columnsSpinner);
         dialogPanel.add(new JLabel("  Filling percentage:", JLabel.LEFT));
         dialogPanel.add(fillingPercentageField);
         contentPane.add(dialogPanel, BorderLayout.NORTH);
         createButton.addActionListener(this);
         contentPane.add(createButton, BorderLayout.SOUTH);
            setSize(260, 125);
     public void actionPerformed(ActionEvent e) {
          int numOfRows = getSpinnerValue(rowsSpinner, mainFrame.getDefaultNumberOfRows());
          if ((numOfRows < 1) || (numOfRows > mainFrame.getMaxNumberOfRows())) throw new NumberFormatException();
          int numOfColumns = getSpinnerValue(columnsSpinner, mainFrame.getDefaultNumberOfColumns());
          if ((numOfColumns < 1) || (numOfColumns > mainFrame.getMaxNumberOfColumns())) throw new NumberFormatException();
          try {     
               float percentage = (Float.valueOf(fillingPercentageField.getText())).floatValue();
               if ((percentage < 0.0f) || (percentage > 100.0f)) throw new NumberFormatException();
               dispose();
               ((JCFrame)getOwner()).loadPicture(JCToolkit.getRandomCrossword(numOfRows, numOfColumns, percentage / 100));
          } catch (NumberFormatException nfe) {
               fillingPercentageField.requestFocus();
     private int getSpinnerValue(JSpinner spinner, int defaultValue) {
          try { spinner.commitEdit(); }
          catch (ParseException pe) { spinner.setValue(defaultValue); }
          return ((Integer)(spinner.getValue())).intValue();
}

Answer 1

OK, Michael. Now is much much better !
But still 2 questions:
1) If I type some string on the "Number of rows" spinner, then press Enter, the dialog takes the default value 10 (which I see when I enter the dialog again). But If I enter some string in the "Filling percentage" spinner, then press Enter, the dialog doesn't take the default value (it takes all the string). Why ?
2) I want that if the entered number is out of legal range, i.e. for example ((numOfRows < 1) || (numOfRows > 99)) then pressing Enter will not close the dialog with the default values, and the user will need to enter a legal values. What should I change to add this requirement ?
Many thanks again !!!
Here is the last code:
import javax.swing.*;       
public class Test {
     private static void createAndShowGUI() {       
        JFrame frame = new JFrame("HelloWorldSwing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        MyDialog dialog = new MyDialog(frame);
            MyMenuBar menuBar = new MyMenuBar(frame);
          frame.setJMenuBar(menuBar);
        frame.pack();
        frame.setVisible(true);
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
import java.text.ParseException;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MyDialog extends JDialog implements ActionListener {
     private JFrame mainFrame;
     private JTextField fillingPercentageField;
     private JSpinner rowsSpinner, columnsSpinner;
     private JButton createButton = new JButton("Create random crossword");
     public MyDialog(JFrame mainFrame) {
            super(mainFrame, "Create random crossword", true);
            this.mainFrame = mainFrame;
            rowsSpinner = new JSpinner(new SpinnerNumberModel(10, 1, 99, 1));
            columnsSpinner = new JSpinner(new SpinnerNumberModel(20, 1, 100, 2));
            fillingPercentageField = new JTextField(String.valueOf(8.7));
            ((JSpinner.DefaultEditor)(rowsSpinner.getEditor())).getTextField().setHorizontalAlignment(JTextField.LEFT);
            ((JSpinner.DefaultEditor)(columnsSpinner.getEditor())).getTextField().setHorizontalAlignment(JTextField.LEFT);
            Container contentPane = getContentPane();
            JPanel dialogPanel = new JPanel();
              dialogPanel.setLayout(new GridLayout(3, 2));
              dialogPanel.add(new JLabel("  Number of rows:", JLabel.LEFT));
              dialogPanel.add(rowsSpinner);
              dialogPanel.add(new JLabel("  Number of columns:", JLabel.LEFT));
              dialogPanel.add(columnsSpinner);
              dialogPanel.add(new JLabel("  Filling percentage:", JLabel.LEFT));
              dialogPanel.add(fillingPercentageField);
              contentPane.add(dialogPanel, BorderLayout.NORTH);
              createButton.addActionListener(this);
              contentPane.add(createButton, BorderLayout.SOUTH);
              KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {
                  public boolean dispatchKeyEvent(KeyEvent ke) {
                         if(ke.getID() == KeyEvent.KEY_PRESSED) {
                           if (((KeyEvent) ke).getKeyCode() == KeyEvent.VK_ENTER) {
                                  //createButton.doClick();
                                  if(isVisible()) createButton.doClick();
                         return false;
            setSize(260, 125);
     public void actionPerformed(ActionEvent e) {
          int numOfRows = getSpinnerValue(rowsSpinner, 10);
          if ((numOfRows < 1) || (numOfRows > 99)) throw new NumberFormatException();
          int numOfColumns = getSpinnerValue(columnsSpinner, 20);
          if ((numOfColumns < 1) || (numOfColumns > 100)) throw new NumberFormatException();
          try {     
               float percentage = (Float.valueOf(fillingPercentageField.getText())).floatValue();
               if ((percentage < 0.0f) || (percentage > 100.0f)) throw new NumberFormatException();
          } catch (NumberFormatException nfe) {
               fillingPercentageField.requestFocus();
          } finally {
               dispose();
          JOptionPane.showMessageDialog(mainFrame, "OK", "Important Message", JOptionPane.PLAIN_MESSAGE);
     private int getSpinnerValue(JSpinner spinner, int defaultValue) {
          try { spinner.commitEdit(); }
          catch (ParseException pe) { spinner.setValue(defaultValue); }
          return ((Integer)(spinner.getValue())).intValue();
import javax.swing.*;
import java.awt.event.*;
public class MyMenuBar extends JMenuBar implements ActionListener {
     private JFrame mainFrame;
     private JMenuItem showDialog;
     private MyDialog dialog;
     public MyMenuBar(JFrame mainFrame) {
          this.mainFrame = mainFrame;
          dialog = new MyDialog(mainFrame);
          JMenu menu = new JMenu("Misc");    
          menu.setMnemonic(KeyEvent.VK_M);
          showDialog = new JMenuItem("Show dialog");
          showDialog.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_D, 0));
          showDialog.addActionListener(this);
          menu.add(showDialog);
          add(menu);
     public void actionPerformed(ActionEvent e) {
          if (e.getSource() == showDialog) {
               dialog.setVisible(true);
               return;
}