ciao a tutti non riesco a capire qual'è l'errore!!!
questo è il cod:
l'errore che mi esce è questo:codice:import java.io.*; import java.net.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.border.*; import javax.sound.sampled.*; import javax.sound.midi.*; public class SoundPlayer extends JComponent { boolean midi; Sequence sequence; Sequencer sequencer; Clip clip; boolean playing = false; int audioLength; int audioPosition = 0; JButton play; JSlider progress; JLabel time; Timer timer; public static void main(String[ ] args) throws IOException, UnsupportedAudioFileException, LineUnavailableException, MidiUnavailableException, InvalidMidiDataException { SoundPlayer player; File file = new File("C://song.mid"); boolean ismidi; try { MidiSystem.getMidiFileFormat(file); ismidi = true; } catch(InvalidMidiDataException e) { ismidi = false; } player = new SoundPlayer(file, ismidi); JFrame f = new JFrame("SoundPlayer"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane( ).add(player, "Center"); f.pack( ); f.setVisible(true); } public SoundPlayer(File f, boolean isMidi) throws IOException, UnsupportedAudioFileException, LineUnavailableException, MidiUnavailableException, InvalidMidiDataException { if (isMidi) { midi = true; sequencer = MidiSystem.getSequencer( ); sequencer.open( ); Synthesizer synth = MidiSystem.getSynthesizer( ); synth.open( ); Transmitter transmitter = sequencer.getTransmitter( ); Receiver receiver = synth.getReceiver( ); transmitter.setReceiver(receiver); sequence = MidiSystem.getSequence(f); sequencer.setSequence(sequence); audioLength = (int)sequence.getTickLength( ); } else { midi = false; AudioInputStream ain = AudioSystem.getAudioInputStream(f); try { DataLine.Info info = new DataLine.Info(Clip.class,ain.getFormat( )); clip = (Clip) AudioSystem.getLine(info); clip.open(ain); } finally { ain.close( ); } audioLength = (int)(clip.getMicrosecondLength( )/1000); } play = new JButton("Play"); progress = new JSlider(0, audioLength, 0); time = new JLabel("0"); play.addActionListener(new ActionListener( ) { public void actionPerformed(ActionEvent e) { if (playing) stop( ); else play( ); } }); progress.addChangeListener(new ChangeListener( ) { public void stateChanged(ChangeEvent e) { int value = progress.getValue( ); if (midi) time.setText(value + ""); else time.setText(value/1000 + "." + (value%1000)/100); if (value != audioPosition) skip(value); } }); timer = new javax.swing.Timer(100, new ActionListener( ) { public void actionPerformed(ActionEvent e) { tick( ); } }); Box row = Box.createHorizontalBox( ); row.add(play); row.add(progress); row.add(time); setLayout(new BoxLayout(this, BoxLayout.Y_AXIS)); this.add(row); if (midi) addMidiControls( ); else addSampledControls( ); } public void play( ) { if (midi) sequencer.start( ); else clip.start( ); timer.start( ); play.setText("Stop"); playing = true; } public void stop( ) { timer.stop( ); if (midi) sequencer.stop( ); else clip.stop( ); play.setText("Play"); playing = false; } public void reset( ) { stop( ); if (midi) sequencer.setTickPosition(0); else clip.setMicrosecondPosition(0); audioPosition = 0; progress.setValue(0); } public void skip(int position) { if (position < 0 || position > audioLength) return; audioPosition = position; if (midi) sequencer.setTickPosition(position); else clip.setMicrosecondPosition(position * 1000); progress.setValue(position); } public int getLength( ) { return audioLength; } void tick( ) { if (midi && sequencer.isRunning( )) { audioPosition = (int)sequencer.getTickPosition( ); progress.setValue(audioPosition); } else if (!midi && clip.isActive( )) { audioPosition = (int)(clip.getMicrosecondPosition( )/1000); progress.setValue(audioPosition); } else reset( ); } void addSampledControls( ) { try { FloatControl gainControl = (FloatControl)clip.getControl(FloatControl.Type.MASTER_GAIN); if (gainControl != null) this.add(createSlider(gainControl)); } catch(IllegalArgumentException e) { } try { FloatControl panControl = (FloatControl)clip.getControl(FloatControl.Type.PAN); if (panControl != null) this.add(createSlider(panControl)); } catch(IllegalArgumentException e) { } } JSlider createSlider(final FloatControl c) { if (c == null) return null; final JSlider s = new JSlider(0, 1000); final float min = c.getMinimum( ); final float max = c.getMaximum( ); final float width = max-min; float fval = c.getValue( ); s.setValue((int) ((fval-min)/width * 1000)); java.util.Hashtable labels = new java.util.Hashtable(3); labels.put(new Integer(0), new JLabel(c.getMinLabel( ))); labels.put(new Integer(500), new JLabel(c.getMidLabel( ))); labels.put(new Integer(1000), new JLabel(c.getMaxLabel( ))); s.setLabelTable(labels); s.setPaintLabels(true); s.setBorder(new TitledBorder(c.getType( ).toString( ) + " " + c.getUnits( ))); s.addChangeListener(new ChangeListener( ) { public void stateChanged(ChangeEvent e) { int i = s.getValue( ); float f = min + (i*width/1000.0f); c.setValue(f); } }); return s; } void addMidiControls( ) { final JSlider tempo = new JSlider(50, 200); tempo.setValue((int)(sequencer.getTempoFactor( )*100)); tempo.setBorder(new TitledBorder("Tempo Adjustment (%)")); java.util.Hashtable labels = new java.util.Hashtable( ); labels.put(new Integer(50), new JLabel("50%")); labels.put(new Integer(100), new JLabel("100%")); labels.put(new Integer(200), new JLabel("200%")); tempo.setLabelTable(labels); tempo.setPaintLabels(true); tempo.addChangeListener(new ChangeListener( ) { public void stateChanged(ChangeEvent e) { sequencer.setTempoFactor(tempo.getValue( )/100.0f); } }); this.add(tempo); Track[ ] tracks = sequence.getTracks( ); for(int i = 0; i < tracks.length; i++) { final int tracknum = i; final JCheckBox solo = new JCheckBox("solo"); final JCheckBox mute = new JCheckBox("mute"); solo.addActionListener(new ActionListener( ) { public void actionPerformed(ActionEvent e) { sequencer.setTrackSolo(tracknum,solo.isSelected( )); } }); mute.addActionListener(new ActionListener( ) { public void actionPerformed(ActionEvent e) { sequencer.setTrackMute(tracknum,mute.isSelected( )); } }); Box box = Box.createHorizontalBox( ); box.add(new JLabel("Track " + tracknum)); box.add(Box.createHorizontalStrut(10)); box.add(solo); box.add(Box.createHorizontalStrut(10)); box.add(mute); box.add(Box.createHorizontalGlue( )); this.add(box); } } }
help!!!codice:Exception in thread "main" java.lang.IllegalAccessError: class com.sun.media.sound.AbstractPlayer cannot access its superclass com.sun.media.sound.AbstractMidiDevice at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at com.sun.media.sound.MixerSequencerProvider.getDeviceInfo(MixerSequencerProvider.java:28) at javax.sound.midi.MidiSystem.getFirstDevice(Unknown Source) at javax.sound.midi.MidiSystem.getFirstDevice(Unknown Source) at javax.sound.midi.MidiSystem.getFirstDevice(Unknown Source) at javax.sound.midi.MidiSystem.getDefaultDevice(Unknown Source) at javax.sound.midi.MidiSystem.getDefaultDeviceWrapper(Unknown Source) at javax.sound.midi.MidiSystem.getSequencer(Unknown Source) at javax.sound.midi.MidiSystem.getSequencer(Unknown Source) at SoundPlayer.<init>(SoundPlayer.java:63) at SoundPlayer.main(SoundPlayer.java:46)
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