Does anyone know why i get this error when i click the exit button on the top right corner button?
Code:
javax.sound.midi.MidiUnavailableException: There is no driver installed on your
system.
at com.sun.media.sound.MidiOutDevice.nOpen(Native Method)
at com.sun.media.sound.MidiOutDevice.implOpen(MidiOutDevice.java:54)
at com.sun.media.sound.AbstractMidiDevice.doOpen(AbstractMidiDevice.java
:154)
at com.sun.media.sound.AbstractMidiDevice.openInternal(AbstractMidiDevic
e.java:144)
at com.sun.media.sound.AbstractMidiDevice.getReceiverReferenceCounting(A
bstractMidiDevice.java:349)
at javax.sound.midi.MidiSystem.getReceiver(MidiSystem.java:270)
at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:476)
at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:389)
at SoundProvider.<init>(SoundProvider.java:16)
at SoundProvider.getSingleton(SoundProvider.java:26)
at client.stopMidi(client.java:519)
at client.cleanUpForQuit(client.java:5502)
at RSApplet.exit(RSApplet.java:185)
at RSApplet.run(RSApplet.java:179)
at client.run(client.java:5288)
at java.lang.Thread.run(Thread.java:722)
Exception in thread "Thread-3" java.lang.NullPointerException
at client.stopMidi(client.java:519)
at client.cleanUpForQuit(client.java:5502)
at RSApplet.exit(RSApplet.java:185)
at RSApplet.run(RSApplet.java:179)
at client.run(client.java:5288)
at java.lang.Thread.run(Thread.java:722)
Please help me.