SortedListModel: sortable JList : JList Model « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JList Model

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);
  }
}

14.42.JList Model
	14.42.1.	SortedListModel: sortable JList
	14.42.2.	extends DefaultListModel
	14.42.3.	extends AbstractListModel
	14.42.4.	JList: ListModel and ListSelectionModel. The ListModel handles data. ListSelectionModel works with the GUI.
	14.42.5.	Create a list that allows adds and removes
	14.42.6.	Append an item
	14.42.7.	Insert an item at the beginning
	14.42.8.	Adding and Removing an Item in a JList Component
	14.42.9.	Set method replaces an item
	14.42.10.	Methods are used to remove items
	14.42.11.	DefaultListModel and JList
	14.42.12.	Getting the Items in a JList Component