import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class Main extends JFrame {
public Main() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String items[] = { "A", "B", "C", "D" };
JList list = new JList(items);
ListSelectionModel selModel = list.getSelectionModel();
selModel.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
System.out.println("selection changed: " + e.getFirstIndex());
}
}
});
getContentPane().add(list);
pack();
setVisible(true);
}
public static void main(String[] args) {
Main m = new Main();
}
}