package javax.swing; import java.util.*; import java.awt.event.*; import java.awt.*; import javax.swing.event.*; public class DefaultButtonModel implements ButtonModel, java.io.Serializable { Vector actions = new Vector(); Vector items = new Vector(); Vector changes = new Vector(); ButtonGroup group; JComponent comp; DefaultButtonModel(JComponent a) { comp = a; } public Object[] getSelectedObjects() { return null; } public void fireItemStateChanged(ItemEvent event) { for (int i=0;i