private void btnExitActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnExitActionPerformed
        // TODO add your handling code here:
        int selectedOption = JOptionPane.showConfirmDialog(null,
                "Are you sure you want to EXIT the program?",
                "Choose",
                JOptionPane.YES_NO_OPTION);
        if (selectedOption == JOptionPane.YES_OPTION) {
            System.exit(0);
        }
    }//GEN-LAST:event_btnExitActionPerformed