sclass AutoComboBox extends JComboBox<Object> {
  String keyWord[] = {"item1", "item2", "item3"};
  Vector myVector = new Vector();
  
  *() {
    setModel(new DefaultComboBoxModel(myVector));
    setSelectedIndex(-1);
    setEditable(true);
    JTextField text = (JTextField) this.getEditor().getEditorComponent();
    text.setFocusable(true);
    text.setText("");
    text.addKeyListener(new ComboListener(this, myVector));
    setMyVector();
  }
  
  /**
   * set the item list of the AutoComboBox
   * @param keyWord an String array
   */
  void setKeyWord(String[] keyWord) {
    this.keyWord = keyWord;
    setMyVector();
  }
  
  void setKeyWord(Collection<S> keyWord) {
    setKeyWord(toStringArray(keyWord));
  }
  
  private void setMyVector() {
    copyArrayToVector(keyWord, myVector);
  }
}

sclass ComboListener extends KeyAdapter {
  JComboBox cbListener;
  Vector vector;
  
  public ComboListener(JComboBox cbListenerParam, Vector vectorParam) {
      cbListener = cbListenerParam;
      vector = vectorParam;
  }
  
  public void keyReleased(KeyEvent key) {
    if (key.getKeyCode() == KeyEvent.VK_ENTER) ret;
    
    JTextField tf = cast cbListener.getEditor().getEditorComponent();
    
    if (tf.getCaretPosition() != l(tf.getText())) ret;
    
    String text = ((JTextField) key.getSource()).getText();

    Vector list = getFilteredList(text);
    if (nempty(list)) {
      cbListener.setModel(new DefaultComboBoxModel(list));
      cbListener.setSelectedIndex(-1);
      tf.setText(text); // necessary?
      cbListener.showPopup();
    }
  }

  public Vector getFilteredList(String text) {
    ret new Vector(scoredSearch(text, vector));
  }
}