package javax.swing; import java.io.*; import java.util.*; import javax.swing.event.*; public class ButtonGroup implements Serializable { Vector v = new Vector(); ButtonModel sel; public ButtonGroup() {} public void add(AbstractButton b) { b.getModel().setGroup(this); v.addElement(b); } public void remove(AbstractButton b) { b.getModel().setGroup(null); v.removeElement(b); } public Enumeration getElements() { return v.elements(); } public ButtonModel getSelection() { return sel; } AbstractButton FindButton(ButtonModel m) { for (int i=0;i