Question

(Problem occur in Ubuntu only. Works fine in Windows. I don’t know in other Linux environments)

I have used the approach of the ComponentListener to call focus in JTextField within a dialog, but for this case is just not working, I don’t know why. It shows the focus in the text field and fast change to the button. Run and see:

import java.awt.Component;
import java.awt.GridLayout;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class User {

    private String username = "";
    private String password = "";

    public User() {
    // default constructor
    }

    public User(String username, String password) {
    this.username = username;
    this.password = password;
    }

    /** Create a panel containing the componet and tha label. */
    public JPanel createLabeledComponent(JLabel label, Component comp) {
    GridLayout layout = new GridLayout(2, 1);
    JPanel panel = new JPanel(layout);
    panel.add(label);
    panel.add(comp);
    label.setLabelFor(comp);
    return panel;
    }

    public void showEditDialog() {

    JLabel usernameLbl = new JLabel(username);
    final JTextField usernameField = new JTextField();
    usernameField.setText(username);
    JPanel usernamePnl = createLabeledComponent(usernameLbl, usernameField);

    JLabel passwordLbl = new JLabel(password);
    JPasswordField passwordField = new JPasswordField(password);
    JPanel passwordPnl = createLabeledComponent(passwordLbl, passwordField);

    Object[] fields = { "User:", usernamePnl, "Password:", passwordPnl };

    JOptionPane optionPane = new JOptionPane(fields, JOptionPane.PLAIN_MESSAGE,
        JOptionPane.OK_CANCEL_OPTION, null, null);
    JDialog dialog = optionPane.createDialog("User Data");

    dialog.addComponentListener(new ComponentAdapter() {
        @Override
        public void componentShown(ComponentEvent e) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
            usernameField.requestFocusInWindow();
            }
        });
        }
    });

    dialog.setVisible(true);
    }

    public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
        new User().showEditDialog();
        }
    });
    }

}

Any idea how to solve this?

–update

Everything running on EDT now. Sadly with the same behavior.

By the way, either using the last argument (Object initialValue) of the JOptionPane constructor doesn’t work.

Answer 1

I remember having a similar problem, I used the solution found at the bottom of this page:

https://bugs.java.com/bugdatabase/view_bug?bug_id=5018574