Cursor becomes invisible in JTextField after using default button

Question

In my application there is an update screen (JPanel). I am using default button in that panel. The input field is a normal JTextField. When the update is over the cursor goes back to the input JTextField.
     Now my problem is that when I carry out update with mouse, the cursor is correctly placed into the input JTextField and is visible after the update is over. On the other hand, if I carry out the same update operation using default button (using keyboard), the cursor gets placed correctly in the input JTextfield column, but becomes invisible. If I minimize and then again maximize the window, the cursor appears back. What am I missing ? Note that I am using component.requestFocusInWindow() to get focus back to the input JTextField.
regards,
nirvan

Answer 1

While trying to reproduce the behaviour for SSCCE, I found that it is the JOptionPane.showMessageDialog() that is causing the problem. Here is the SSCCE.
package com.ns;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class TestFocus extends javax.swing.JFrame {
    // Variables declaration - do not modify
    private JTextField field1;
    private JTextField field2;
    private JPanel jPanel1;
    private JButton reset;
    private JButton update;
    // End of variables declaration
    public TestFocus() {
        initComponents();
        setDefaultButton();
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jPanel1 = new JPanel();
        field1 = new JTextField();
        field2 = new JTextField();
        update = new JButton();
        reset = new JButton();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        field1.setPreferredSize(new Dimension(40, 20));
        jPanel1.add(field1);
        field2.setPreferredSize(new Dimension(40, 20));
        jPanel1.add(field2);
        update.setText("Update");
        update.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                updateActionPerformed(evt);
        jPanel1.add(update);
        reset.setText("Reset");
        reset.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                resetActionPerformed(evt);
        jPanel1.add(reset);
        getContentPane().add(jPanel1, BorderLayout.CENTER);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-385)/2, (screenSize.height-258)/2, 385, 258);
    }// </editor-fold>
    public void setDefaultButton(){
        this.getRootPane().setDefaultButton(update);
    private void updateActionPerformed(ActionEvent evt) {
        // TODO add your handling code here:
        JOptionPane.showMessageDialog(this,"Activity Updated Succesfully in Database.",
                                        "Information",
                                        JOptionPane.INFORMATION_MESSAGE);
        update.setEnabled(false);
        field1.setEditable(false);
        reset.setEnabled(true);
        this.getRootPane().setDefaultButton(reset);
    private void resetActionPerformed(ActionEvent evt) {
        // TODO add your handling code here:
        field1.requestFocusInWindow();
        field1.setText("");
        field1.setEditable(true);
        reset.setEnabled(false);
        update.setEnabled(true);
        this.getRootPane().setDefaultButton(update);
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TestFocus().setVisible(true);
}If I remove the JOptionPane.showMessageDialog() method, everything works fine with mouse as well as keyboard.
regards,
nirvan.