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/*Type: Interval Added
, Index0: 0
, Index1: 0
[First, a, b, c, d]
Type: Interval Added
, Index0: 5
, Index1: 5
[First, a, b, c, d, Last]
Type: Interval Added
, Index0: 3
, Index1: 3
[First, a, b, Middle, c, d, Last]
Type: Contents Changed
, Index0: 0
, Index1: 0
[New First, a, b, Middle, c, d, Last]
Type: Contents Changed
, Index0: 6
, Index1: 6
[New First, a, b, Middle, c, d, New Last]
Type: Interval Added
, Index0: 7
, Index1: 7
[New First, a, b, Middle, c, d, New Last, a]
Type: Interval Added
, Index0: 8
, Index1: 8
[New First, a, b, Middle, c, d, New Last, a, b]
Type: Interval Added
, Index0: 9
, Index1: 9
[New First, a, b, Middle, c, d, New Last, a, b, c]
Type: Interval Added
, Index0: 10
, Index1: 10
[New First, a, b, Middle, c, d, New Last, a, b, c, d]
Type: Interval Removed
, Index0: 0
, Index1: 10
[]
* */
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
public class MainClass {
static String labels[] = { "a", "b", "c", "d" };
public static void main(String args[]) {
JFrame frame = new JFrame("Modifying Model");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final DefaultListModel model = new DefaultListModel();
for (int i = 0, n = labels.length; i < n; i++) {
model.addElement(labels[i]);
}
JList jlist = new JList(model);
JScrollPane scrollPane1 = new JScrollPane(jlist);
frame.add(scrollPane1, BorderLayout.WEST);
ListDataListener listDataListener = new ListDataListener() {
public void contentsChanged(ListDataEvent listDataEvent) {
appendEvent(listDataEvent);
}
public void intervalAdded(ListDataEvent listDataEvent) {
appendEvent(listDataEvent);
}
public void intervalRemoved(ListDataEvent listDataEvent) {
appendEvent(listDataEvent);
}
private void appendEvent(ListDataEvent listDataEvent) {
switch (listDataEvent.getType()) {
case ListDataEvent.CONTENTS_CHANGED:
System.out.println("Type: Contents Changed");
break;
case ListDataEvent.INTERVAL_ADDED:
System.out.println("Type: Interval Added");
break;
case ListDataEvent.INTERVAL_REMOVED:
System.out.println("Type: Interval Removed");
break;
}
System.out.println(", Index0: " + listDataEvent.getIndex0());
System.out.println(", Index1: " + listDataEvent.getIndex1());
DefaultListModel theModel = (DefaultListModel) listDataEvent.getSource();
System.out.println(theModel);
}
};
model.addListDataListener(listDataListener);
model.add(0, "First");
model.addElement("Last");
int size = model.getSize();
model.insertElementAt("Middle", size / 2);
size = model.getSize();
if (size != 0)
model.set(0, "New First");
size = model.getSize();
if (size != 0)
model.setElementAt("New Last", size - 1);
for (int i = 0, n = labels.length; i < n; i++) {
model.addElement(labels[i]);
}
model.clear();
size = model.getSize();
if (size != 0)
model.remove(0);
model.removeAllElements();
model.removeElement("Last");
size = model.getSize();
if (size != 0)
model.removeElementAt(size / 2);
size = model.getSize();
if (size != 0)
model.removeRange(0, size / 2);
frame.setSize(640, 300);
frame.setVisible(true);
}
}
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