static JCheckBox jCheckBox() {
  ret new JCheckBox();
}

static JCheckBox jCheckBox(bool checked) {
  ret new JCheckBox("", checked);
}

static JCheckBox jCheckBox(S text, bool checked) {
  ret new JCheckBox(text, checked);
}

static JCheckBox jCheckBox(S text) {
  ret new JCheckBox(text);
}
  
static JCheckBox jCheckBox(S text, bool checked, fO onChange) {
  JCheckBox cb = jCheckBox(checked, onChange);
  cb.setText(text);
  ret cb;
}
  
// onChange can be a Runnable or a voidfunc(bool)
static JCheckBox jCheckBox(bool checked, fO onChange) {
  final JCheckBox cb = jCheckBox(checked);
  cb.addChangeListener(new ChangeListener {
    public void stateChanged(ChangeEvent e) {
      pcallF(onChange, cb.isSelected());
    }
  });
  ret cb;
}