package javasound;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;import javax.swing.border.*;import java.io.File;import java.util.Vector;import javax.sound.sampled.*;import javax.sound.midi.*;public class JavaSound extends JPanel implements ChangeListener, Runnable {    Vector demos = new Vector(4);    JTabbedPane tabPane = new JTabbedPane();    int width = 760, height = 500;    int index;    public JavaSound(String audioDirectory) {        setLayout(new BorderLayout());        JMenuBar menuBar = new JMenuBar();        if (JavaSoundApplet.applet == null) {            JMenu fileMenu = (JMenu) menuBar.add(new JMenu("File"));            JMenuItem item = (JMenuItem) fileMenu.add(new JMenuItem("Exit"));            item.addActionListener(new ActionListener() {                public void actionPerformed(ActionEvent e) { System.exit(0); }            });        }        JMenu options = (JMenu) menuBar.add(new JMenu("Options"));        JMenuItem item = (JMenuItem) options.add(new JMenuItem("Applet Info"));        item.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) { showInfoDialog(); }        });        add(menuBar, BorderLayout.NORTH);        tabPane.addChangeListener(this);        EmptyBorder eb = new EmptyBorder(5,5,5,5);        BevelBorder bb = new BevelBorder(BevelBorder.LOWERED);        CompoundBorder cb = new CompoundBorder(eb,bb);        JPanel p = new JPanel(new BorderLayout());        p.setBorder(new CompoundBorder(cb,new EmptyBorder(0,0,90,0)));        final Juke juke = new Juke(audioDirectory);        p.add(juke);        demos.add(juke);        tabPane.addTab("Juke Box", p);        new Thread(this).start();        add(tabPane, BorderLayout.CENTER);    }    public void stateChanged(ChangeEvent e) {        close();        System.gc();        index = tabPane.getSelectedIndex();        open();    }    public void close() {        ((ControlContext) demos.get(index)).close();    }    public void open() {        ((ControlContext) demos.get(index)).open();    }    public Dimension getPreferredSize() {        return new Dimension(width, height);    }    public static void showInfoDialog() {        final String msg =            "When running the Java Sound as an applet these permissions\n" +            "are necessary in order to load/save files and record audio :  \n\n"+            "grant { \n" +            "  permission java.io.FilePermission \"<<ALL FILES>>\", \"read, write\";\n" +            "  permission javax.sound.sampled.AudioPermission \"record\"; \n" +            "  permission java.util.PropertyPermission \"user.dir\", \"read\";\n"+            "}; \n\n" +            "The permissions need to be added to the .java.policy file.";        new Thread(new Runnable() {            public void run() {                JOptionPane.showMessageDialog(null, msg, "Applet Info", JOptionPane.INFORMATION_MESSAGE);            }        }).start();    }    public void run() {        EmptyBorder eb = new EmptyBorder(5,5,5,5);        BevelBorder bb = new BevelBorder(BevelBorder.LOWERED);        CompoundBorder cb = new CompoundBorder(eb,bb);        JPanel p = new JPanel(new BorderLayout());        p.setBorder(new CompoundBorder(cb,new EmptyBorder(0,0,90,0)));        CapturePlayback capturePlayback = new CapturePlayback();        demos.add(capturePlayback);        p.add(capturePlayback);        tabPane.addTab("Capture/Playback", p);        MidiSynth midiSynth = new MidiSynth();        demos.add(midiSynth);        tabPane.addTab("Midi Synthesizer", midiSynth);        p = new JPanel(new BorderLayout());        p.setBorder(new CompoundBorder(cb,new EmptyBorder(0,0,5,20)));        Groove groove = new Groove();        demos.add(groove);        p.add(groove);        tabPane.addTab("Groove Box", p);    }    public static void main(String[] args) {        try {            if (MidiSystem.getSequencer() == null) {                System.err.println("MidiSystem Sequencer Unavailable, exiting!");                System.exit(1);            } else if (AudioSystem.getMixer(null) == null) {                System.err.println("AudioSystem Unavailable, exiting!");                System.exit(1);            }        } catch (Exception ex) { ex.printStackTrace(); System.exit(1); }        String media = "./audio";        if (args.length > 0) {            File file = new File(args[0]);            if (file == null && !file.isDirectory()) {                System.out.println("usage: java JavaSound audioDirectory");            } else {                media = args[0];            }        }        final JavaSound demo = new JavaSound(media);        JFrame f = new JFrame("Java Sound");        f.addWindowListener(new WindowAdapter() {            public void windowClosing(WindowEvent e) {System.exit(0);}            public void windowDeiconified(WindowEvent e) { demo.open(); }            public void windowIconified(WindowEvent e) { demo.close(); }        });        f.getContentPane().add("Center", demo);        f.pack();        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();        f.setLocation(d.width/2 - demo.width/2, d.height/2 - demo.height/2);        f.setSize(new Dimension(demo.width, demo.height));        f.setVisible(true);    }}