SortedListModel.java Source code

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Here is the source code for SortedListModel.java

Source

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);
    }
}