InputVerifer unable to exit with cancel button.

Question

Just playing with the verifier and notice that I am unable to "cancel" when I failed the validation. I understand that I can not conintue to next field, but if I failed but how come I can't cancel out of the form? I could exit if use the [x] on the upper right side. which uses the WindowAdapter.
Any idea on how I can permit my cancel button to work under this situation also?
Here is my sample code. The basic code I got it from http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/InputVerifier.html
modified for my own test.
package verifier;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
public class VerifierTest extends JFrame {
    public VerifierTest() {
        JTextField tf1 = new JTextField ();
        getContentPane().add (tf1, BorderLayout.NORTH);
        tf1.setInputVerifier(new PassVerifier());
        JTextField tf2 = new JTextField ("next field");
        getContentPane().add (tf2, BorderLayout.CENTER);
          JButton buttonCancel = new JButton("cancel");
          buttonCancel.addActionListener(new CancelListener());
          getContentPane().add(buttonCancel,BorderLayout.SOUTH);     
        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                 System.out.println(" win closing");
                dispose();
        addWindowListener(l);
    class PassVerifier extends InputVerifier {
        public boolean verify(JComponent input) {
            JTextField tf = (JTextField) input;
              if(tf.getText().equals(""))
                input.setInputVerifier(null);
                JOptionPane.showMessageDialog(null,"Error, textfield empty");
                input.setInputVerifier(this);
                return false;
              return true;
     protected class CancelListener implements ActionListener{
          public void actionPerformed(ActionEvent event) {
               System.out.println(" cacnelListener Action");
               dispose(); // Or System.exit(0) if you don't want to do
               // something on close.
    public static void main(String[] args) {
        JFrame f = new VerifierTest();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.pack();
        f.setVisible(true);
}

Answer 1

thank you both. I should of use search forums with the key word. I was getting too much return with jtextfield inputverifier.
oh well....