// Some choices
JRadioButton dem = new JRadioButton("B. Clinton", false);
dem.setActionCommand("Bill");
JRadioButton rep = new JRadioButton("R. Dole", false);
rep.setActionCommand("Bob");
JRadioButton ind = new JRadioButton("R. Perot", false);
ind.setActionCommand("Ross");
// A group, to ensure that we only vote for one.
final ButtonGroup group = new ButtonGroup();
group.add(dem);
group.add(rep);
group.add(ind);
// A simple ActionListener, showing each selection using the ButtonModel.
class VoteActionListener implements ActionListener {
public void actionPerformed(ActionEvent ex) {
String choice = group.getSelection().getActionCommand();
System.out.println("ACTION Candidate Selected: " + choice);
}
}
// A simple ItemListener, showing each selection and deselection.
class VoteItemListener implements ItemListener {
public void itemStateChanged(ItemEvent ex) {
String item =
((AbstractButton)ex.getItemSelectable()).getActionCommand();
boolean selected = (ex.getStateChange() == ItemEvent.SELECTED);
System.out.println("ITEM Candidate Selected: " + selected +
" Selection: " + item);
}
}
// Add listeners to each button.
ActionListener al = new VoteActionListener();
dem.addActionListener(al);
rep.addActionListener(al);
ind.addActionListener(al);
ItemListener il = new VoteItemListener();
dem.addItemListener(il);
rep.addItemListener(il);
ind.addItemListener(il);
// Throw everything together.
JFrame frame = new JFrame();
frame.addWindowListener(new BasicWindowMonitor());
Container c = frame.getContentPane();
c.setLayout(new GridLayout(4,1));
c.add(new JLabel("Please Cast Your Vote"));
c.add(dem);
c.add(rep);
c.add(ind);
frame.pack();
frame.setVisible(true);
