KeyPress for my Button

[bigj]

hi i need some help how to resolve this problem,

public class PopUpDialog {

    private JDialog popUpDialog;
    private JPanel popUpPanel;

    private JLabel errorMessage;
    
    private Image icon;

    private ImageIcon background;

    private JButton okButton;
    
    private int popUpWindowWidth;

    public PopUpDialog() {

        popUpDialog = new JDialog();
        icon = new ImageIcon("c:/pics/mercuryLogo.jpg").getImage().getScaledInstance(300, 300, 0);
        background = new ImageIcon("c:/pics/popupbck5.jpg");
        okButton = new JButton("Ok");
        errorMessage = new JLabel();
        popUpWindowWidth = 300;
    }

    public void setComponents(Container cont) {

        popUpPanel = new JPanel() {

            @Override
            public void paintComponent(Graphics g) {

                // Scale image to size of component
                Dimension d = getSize();

                g.drawImage(background.getImage(), 0, 0, d.width, d.height, null);

                super.paintComponent(g);
            }
        };
        popUpPanel.setOpaque(false);

        // set this panel's layout to null for absolute positioning of
        // components
        popUpPanel.setLayout(null);

        // set the properties and actions of this button
        Action closeAction = new AbstractAction() {

            public void actionPerformed(ActionEvent ae) {

                popUpDialog.dispose();
            }
        };
        okButton.addActionListener(closeAction);
        okButton.setBounds(105, 38, 75, 20);
        okButton.setFont(new Font("Monospaced", Font.BOLD, 11));
        okButton.setBackground(Color.LIGHT_GRAY);
        okButton.setMnemonic(KeyEvent.VK_ENTER); // UNSUPPORTED Hot Key

        
        // set the properties of this label
        errorMessage.setText("Please Check The Specified Field.");
        errorMessage.setBounds(10, 3, 500, 30);
        errorMessage.setFont(new Font("Monospaced", Font.BOLD, 12));

        popUpPanel.add(errorMessage);
        popUpPanel.add(okButton);
        // add the panel to the container
        cont.add(popUpPanel);
    }

    public void createPopUpFrame() {
        
        setComponents(popUpDialog.getContentPane());
        popUpDialog.setIconImage(icon);
        popUpDialog.setTitle("  Unauthorized Data Entry");
        popUpDialog.setSize(popUpWindowWidth, 100);
        popUpDialog.setLocationRelativeTo(null);
        popUpDialog.setResizable(false);
        popUpDialog.setVisible(true);
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            PopUpDialog pU = new PopUpDialog();
            
            public void run() {

                pU.createPopUpFrame();
            }
        });
    }
}

i dont know how to make an action for this button,
instead of two keys (alt+enter) which is setMnemonic(KeyEvent.VK_ENTER);. I want to make a keypress "Enter" only... what method should i use to implement this?

[Fubarable]

Have you tried setting the root container's default button to the OK button? For e.g.,

  public PopUpDialog() {
    popUpDialog = new JDialog();
    okButton = new JButton("Ok");
    
    // *** add this:
    popUpDialog.getRootPane().setDefaultButton(okButton);
    
    errorMessage = new JLabel();
    popUpWindowWidth = 300;
  }

An easier alternative though is to simply use one of the JOptionPanes.

Much luck!

[bigj]

i tried but it doesnt work sir..

[bigj]

tnx sir.. i solved the problem.. and i would like to share what i gathered

public class JButtonWithEnterKeyPress {

    public static void main(String[] args) {

        JFrame frame = new JFrame();
        JPanel panel = new JPanel();

        // set this panel's layout to null for absolute positioning of components
        panel.setLayout(null);
        
        JButton button = new JButton();

        button.registerKeyboardAction(button.getActionForKeyStroke(
                                      KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, false)),
                                      KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, false),
                                      JComponent.WHEN_FOCUSED);

        button.registerKeyboardAction(button.getActionForKeyStroke(
                                      KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, true)),
                                      KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true),
                                      JComponent.WHEN_FOCUSED);

        button.setText("Press The Enter Key");
        button.setBounds(0, 0, 200, 120);
        panel.add(button);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(panel);
        frame.setVisible(true);
        frame.setSize(200, 120);
    }
}

you can use this if you want to customize or define your own dialog..
this is a part of my school project so im desperate for looking this algorithm for my button..