jarresourceloading.java

《SWING HACKS》源码 作者: Joshua Marinacci,Chris Adamson 著 徐晔 译 出版: 2007年2月

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.sound.sampled.*;
import java.net.*;

public class JarResourceLoading extends JFrame
    implements ActionListener {

    JButton button;
    ImageIcon buttonIcon;
    Clip buhClip;

    public final static String SOUND_PATH = "sounds/buhbuhbuh.aiff";
    public final static String IMAGE_PATH = "images/keagan-buh.jpeg";

    public JarResourceLoading () {
        super ("Resources from .jar");
        // get image and make button
        URL imageURL = getClass().getClassLoader().getResource (IMAGE_PATH);
        System.out.println ("found image at " + imageURL);
        buttonIcon = new ImageIcon (imageURL);
        button = new JButton ("Click to Buh!", buttonIcon);
        button.setHorizontalTextPosition (SwingConstants.CENTER);
        button.setVerticalTextPosition (SwingConstants.BOTTOM);
        button.addActionListener (this);
        getContentPane().add (button);
        // load sound into Clip
        try {
            URL soundURL = getClass().getClassLoader().getResource (SOUND_PATH);
            System.out.println ("found sound at " + soundURL);
            Line.Info linfo = new Line.Info (Clip.class);
            Line line = AudioSystem.getLine (linfo);
            buhClip = (Clip) line;
            AudioInputStream ais = AudioSystem.getAudioInputStream(soundURL);
            buhClip.open(ais);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public void actionPerformed (ActionEvent e) {
        System.out.println ("click!");
        if (buhClip != null) {
            buhClip.setFramePosition (0);
            buhClip.start();
        }
        else
            JOptionPane.showMessageDialog (this,
                                           "Couldn't load sound",
                                           "Error",
                                           JOptionPane.ERROR_MESSAGE);
    }

    public static final void main (String[] args) {
        JFrame frame = new JarResourceLoading();
        frame.pack();
        frame.setVisible(true);
    }

}