We would like to know how to handle List data event.
/*from www. j a v a 2 s .co m*/ import javax.swing.DefaultListModel; import javax.swing.JList; import javax.swing.event.ListDataEvent; import javax.swing.event.ListDataListener; public class Main { public static void main(String[] argv) throws Exception { JList list = new JList(); // Register a list data listener DefaultListModel model = (DefaultListModel) list.getModel(); model.addListDataListener(new MyListDataListener()); } } class MyListDataListener implements ListDataListener { public void intervalAdded(ListDataEvent evt) { DefaultListModel model = (DefaultListModel) evt.getSource(); int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end - start + 1; for (int i = start; i <= end; i++) { Object item = model.getElementAt(i); } } public void intervalRemoved(ListDataEvent evt) { int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end - start + 1; } public void contentsChanged(ListDataEvent evt) { DefaultListModel model = (DefaultListModel) evt.getSource(); int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end - start + 1; for (int i = start; i <= end; i++) { Object item = model.getElementAt(i); } } }