How about some check boxes?
This kit has java.awt.Checkbox and java.awt.CheckboxGroup.
Yes, very simple rendering but they're
light weight widgets. But you do get circles for radio buttons and squares for checkboxes!
Don't forget, as with the other widgets, screen refresh is delegated to your ItemListener...
Code:
public void itemStateChanged(ItemEvent event) {
Checkbox cb = (Checkbox)event.getSource();
cb.repaint();
DisplayControl.quickRefresh();
}