Hello,
I am running following code from "Head First" chap-11
Code :
import javax.sound.midi.*;
public class MiniMiniMusicApp
{
public static void main(String[] args)
{
MiniMiniMusicApp mini = new MiniMiniMusicApp();
mini.play();
}
public void play()
{
try
{
Sequencer player = MidiSystem.getSequencer();
player.open();
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
Track track = seq.createTrack();
ShortMessage a = new ShortMessage();
a.setMessage(144,1,44,100);
MidiEvent noteOn = new MidiEvent(a,1);
track.add(noteOn);
ShortMessage b = new ShortMessage();
a.setMessage(128,1,44,100);
MidiEvent noteOff = new MidiEvent(a,16);
track.add(noteOff);
player.setSequence(seq);
player.start();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}
But when I am running it !!! Following error is displayed. Please help me to resolve there error.
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: cannot resolve symbol
symbol : variable Sequencer
location: class MiniMiniMusicApp
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: cannot resolve symbol
symbol : variable PPQ
location: class MiniMiniMusicApp
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: javax.sound.midi.Sequencer is abstract; cannot be instantiated
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:19: cannot resolve symbol
symbol : method createTrack ()
location: interface javax.sound.midi.Sequencer
Track track = seq.createTrack();
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:31: cannot resolve symbol
symbol : method setSequence (javax.sound.midi.Sequencer)
location: interface javax.sound.midi.Sequencer
player.setSequence(seq);
^
5 errors
Tool completed with exit code 1
Thanks
Divya
I am running following code from "Head First" chap-11
Code :
import javax.sound.midi.*;
public class MiniMiniMusicApp
{
public static void main(String[] args)
{
MiniMiniMusicApp mini = new MiniMiniMusicApp();
mini.play();
}
public void play()
{
try
{
Sequencer player = MidiSystem.getSequencer();
player.open();
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
Track track = seq.createTrack();
ShortMessage a = new ShortMessage();
a.setMessage(144,1,44,100);
MidiEvent noteOn = new MidiEvent(a,1);
track.add(noteOn);
ShortMessage b = new ShortMessage();
a.setMessage(128,1,44,100);
MidiEvent noteOff = new MidiEvent(a,16);
track.add(noteOff);
player.setSequence(seq);
player.start();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}
But when I am running it !!! Following error is displayed. Please help me to resolve there error.
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: cannot resolve symbol
symbol : variable Sequencer
location: class MiniMiniMusicApp
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: cannot resolve symbol
symbol : variable PPQ
location: class MiniMiniMusicApp
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:18: javax.sound.midi.Sequencer is abstract; cannot be instantiated
Sequencer seq = new Sequencer(Sequencer,PPQ,4);
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:19: cannot resolve symbol
symbol : method createTrack ()
location: interface javax.sound.midi.Sequencer
Track track = seq.createTrack();
^
D:\JavaProg\head first\chap-11\MiniMiniMusicApp.java:31: cannot resolve symbol
symbol : method setSequence (javax.sound.midi.Sequencer)
location: interface javax.sound.midi.Sequencer
player.setSequence(seq);
^
5 errors
Tool completed with exit code 1
Thanks
Divya