});
controlsColumn.addButton("Remove ActionListener", new ActionListener() {
public void actionPerformed(ActionEvent e) {
textField.removeActionListener(actionListener);
passwordField.removeActionListener(actionListener);
textArea.removeActionListener(actionListener);
}
});
controlsColumn.addButton("Add DocumentListener", new ActionListener() {
public void actionPerformed(ActionEvent e) {
textField.getDocument().addDocumentListener(documentListener);