import org.gwtbootstrap3.client.ui.RadioButton; //导入依赖的package包/类
private ButtonGroup addButtons() {
  ButtonGroup buttonGroup = new ButtonGroup();
  buttonGroup.setHeight("4em");
  buttonGroup.setJustified(true);
  buttonGroup.setDataToggle(Toggle.BUTTONS);
  for (final ButtonType t : ButtonType.values()) {
    RadioButton radioButton = new RadioButton(t.toString());
    radioButton.setType(t);
    radioButton.setSize(ButtonSize.SMALL);
    radioButton.addClickHandler(new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        userColor = t.name();
      }
    });
    buttonGroup.add(radioButton);
  }
  return buttonGroup;
}
 

import org.gwtbootstrap3.client.ui.RadioButton; //导入依赖的package包/类
@Override
public void addRendererItem(final String renderer) {
    final RadioButton rb = new RadioButton(renderer);
    rb.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            unselectCurrent();
            presenter.onRendererSelected();
        }
    });
    radioButtonsPanel.add(rb);
}
 

import org.gwtbootstrap3.client.ui.RadioButton; //导入依赖的package包/类
@Override
public void setSelectedRendererIndex(int index) {
    unselectCurrent();
    selectedRadio = (RadioButton) radioButtonsPanel.getWidget(index);
    selectedRadio.setValue(true);
}