ClassCastException

farm402

in Contributed Library Questions • 1 month ago

Hello!

I wrote a programme for live visuals, using the promidi library and a Korg nano controller to play with it. When I press the „SCENE“ button on my controller (and only when I do that) the console writes the following message:

java.lang.ClassCastException: com.sun.media.sound.FastSysexMessage

cannot be cast to javax.sound.midi.ShortMessage
at promidi.MidiInDevice.send( MidiInDevice.java:98)
at com.sun.media.sound. AbstractMidiDevice$ TransmitterList.sendMessage( AbstractMidiDevice.java:701)
at com.sun.media.sound. MidiInDevice. callbackLongMessage( MidiInDevice.java:162)
at com.sun.media.sound. MidiInDevice.nGetMessages( Native Method)
at com.sun.media.sound. MidiInDevice.run(MidiInDevice. java:123)
at java.lang.Thread.run(Thread. java:680)

I think it always did that but I never paid much attention to it. However since I updated to Processing 2.0.1 the programme crashes.

Can somebody maybe explain this message to me? I have no idea how to fix that.

Thank you so much!

Replies(4)

dimkir

Re: ClassCastException

1 month ago

However since I updated to Processing 2.0.1

updated from what?

from 2.0b7 ?
1.5.1 ?
2.0b8???

This error smells like incompatibility of Java versions. Seems like in newer version of Java there's something changed or broken and promidi.MidiInDevice.send() is failing.

But this is just a guess, as I have never worked with this sound api.

farm402

Re: ClassCastException

1 month ago

Sorry, I forgot to mention that. It worked both with 1.5.1 and 2.0b9. The error message was always there but the programme never crashed. Thus I didn’t care much about it.

Actually with 2.0b9 it still works, and it would be the same version of Java as with 2.0.2, right?

dimkir

Re: ClassCastException

1 month ago

I just checked seems both of them use 1.6 37 version of Java. :S

farm402

Re: ClassCastException

1 month ago

Well, thank you anyway!

Since nobody seems to know the solution to this problem I guess I will trya different MIDI library and if nothing helps stick to the beta version for a while.

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