JTextField ChangeListener?

public class ChangeText extends JFrame {
  public ChangeText() {
    super("Teste");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(300, 300);
    Container c = getContentPane();
    c.setLayout(new FlowLayout());
    final JTextField field = new JTextField();
    PlainDocument doc = (PlainDocument) field.getDocument();
    doc.addDocumentListener(new DocumentListener() {
      public void changedUpdate(DocumentEvent e) {
        System.out.println("Updated");
      }
      public void insertUpdate(DocumentEvent e) {
        System.out.println("Inserted");
      }
      public void removeUpdate(DocumentEvent e) {
        System.out.println("Deleted");
      }
    }); 
    field.setColumns(10);
    JButton action = new JButton("Executa");
    action.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        field.setText("Novo Teste");
      }
    }); 
    c.add(field);
    c.add(action);
  }
  
  public static void main(String[] args) {
    new ChangeText().show();
  }
}