|
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.*;
import java.util.*;
class SortedListModel extends AbstractListModel {
SortedSet<Object> model;
public SortedListModel() {
model = new TreeSet<Object>();
}
public int getSize() {
return model.size();
}
public Object getElementAt(int index) {
return model.toArray()[index];
}
public void add(Object element) {
if (model.add(element)) {
fireContentsChanged(this, 0, getSize());
}
}
public void addAll(Object elements[]) {
Collection<Object> c = Arrays.asList(elements);
model.addAll(c);
fireContentsChanged(this, 0, getSize());
}
public void clear() {
model.clear();
fireContentsChanged(this, 0, getSize());
}
public boolean contains(Object element) {
return model.contains(element);
}
public Object firstElement() {
return model.first();
}
public Iterator iterator() {
return model.iterator();
}
public Object lastElement() {
return model.last();
}
public boolean removeElement(Object element) {
boolean removed = model.remove(element);
if (removed) {
fireContentsChanged(this, 0, getSize());
}
return removed;
}
}
public class JListLocationToIndexSample {
public static void main(String args[]) {
SortedListModel model = new SortedListModel();
model.add("A");
model.add("C");
model.add("Z");
model.add("B");
JFrame frame = new JFrame("Selecting JList");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JList jlist = new JList(model);
JScrollPane scrollPane1 = new JScrollPane(jlist);
frame.add(scrollPane1, BorderLayout.CENTER);
frame.setSize(350, 200);
frame.setVisible(true);
}
}
|
