GoogleOlympiad

GoogleOlympiad is a Java program to display each of the 17 Google 2008 Olympic images.

This program demonstrates how to load and cache images from a jar file. An enclosed script shows how to collect a set of images.

Java Web Start: Launch the GoogleOlympiad by clicking here.

Download: Click here to download the jar file.


import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.border.*;

/**
 * @author John B. Matthews
 */
public class GoogleOlympiad extends JPanel implements ActionListener {

    private static final int MAX = 20;
    private static final Font sans = new Font("SansSerif", Font.PLAIN, 16);
    private static final Border border =
        BorderFactory.createMatteBorder(4, 16, 4, 16, Color.lightGray);
    private List<String> list = new ArrayList<String>(MAX);
    private List<ImageIcon> cache = new ArrayList<ImageIcon>(MAX);
    private JLabel imageLabel = new JLabel();
    private JButton prevButton = new JButton();
    private JButton nextButton = new JButton();
    private JComboBox favorites;

    public GoogleOlympiad() {
        this.setLayout(new BorderLayout());

        list.add("opening.gif");
        list.add("cycling.gif");
        list.add("weightlifting.gif");
        list.add("diving.gif");
        list.add("rhythm.gif");
        list.add("rings.gif");
        list.add("basketball.gif");
        list.add("badminton.gif");
        list.add("soccer.gif");
        list.add("rowing.gif");
        list.add("pingpong.gif");
        list.add("swimming.gif");
        list.add("trackfield.gif");
        list.add("highjump.gif");
        list.add("martialarts.gif");
        list.add("baseball.gif");
        list.add("closing.gif");
        for (int i = 0; i < list.size(); i++) cache.add(i, null);

        JLabel titleLabel = new JLabel();
        titleLabel.setText("The Google 2008 Olympiad");
        titleLabel.setHorizontalAlignment(JLabel.CENTER);
        titleLabel.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 24));
        titleLabel.setBorder(border);
        this.add(titleLabel, BorderLayout.NORTH);

        imageLabel.setIcon(getImage(0));
        imageLabel.setHorizontalAlignment(JLabel.CENTER);
        imageLabel.setBorder(border);
        this.add(imageLabel, BorderLayout.CENTER);

        favorites = new JComboBox(
            list.toArray(new String[list.size()]));
        favorites.setActionCommand("favs");
        favorites.addActionListener(this);

        prevButton.setText("\u22b2Prev");
        prevButton.setFont(sans);
        prevButton.setActionCommand("prev");
        prevButton.addActionListener(this);

        nextButton.setText("Next\u22b3");
        nextButton.setFont(sans);
        nextButton.setActionCommand("next");
        nextButton.addActionListener(this);

        JPanel controlPanel = new JPanel();
        controlPanel.add(prevButton);
        controlPanel.add(favorites);
        controlPanel.add(nextButton);
        controlPanel.setBorder(border);
        this.add(controlPanel, BorderLayout.SOUTH);
    }

    public void actionPerformed(ActionEvent ae) {
        String cmd = ae.getActionCommand();
        if ("favs".equals(cmd)) {
            int index = favorites.getSelectedIndex();
            ImageIcon image = getImage(index);
            imageLabel.setIcon(image);
            if (image != null) imageLabel.setText("");
            else imageLabel.setText("Image not available.");
        }
        if ("prev".equals(cmd)) {
            int index = favorites.getSelectedIndex() - 1;
            if (index < 0) index = list.size() - 1;
            favorites.setSelectedIndex(index);
        }
        if ("next".equals(cmd)) {
            int index = favorites.getSelectedIndex() + 1;
            if (index > list.size() - 1) index = 0;
            favorites.setSelectedIndex(index);
        }
    }

    public JButton getDefault() { return nextButton; }

    // Return the (possibly cached) image having the given index.
    private ImageIcon getImage(int index) {
        ImageIcon image = cache.get(index);
        if (image != null) return image;
        String name = "images/" + list.get(index);
        URL url = GoogleOlympiad.class.getResource(name);
        if (url != null) {
            image = new ImageIcon(url);
        }
        cache.set(index, image);
        return image;
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                GoogleOlympiad go = new GoogleOlympiad();
                frame.add(go);
                frame.setTitle("Google Olympiad");
                frame.setSize(400, 300);
                frame.setVisible(true);
                go.getDefault().requestFocusInWindow();
            }
        });
    }
}

Copyright © 2008 John B. Matthews. Distributed under the terms of the GPL
ċ
GoogleOlympiad.jar
(256k)
John Matthews,
Mar 25, 2012, 11:07 AM
ċ
GoogleOlympiad.jnlp
(1k)
John Matthews,
Apr 17, 2011, 1:29 PM
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