MIDI help

[Tom Winn]

Hey guys, I have a question about sending and receiving MIDI messages...
How?
I have tried many different variations of code but get nothing...
I would be greatful if someone could point me in the right direction.

Cheers,
winn_man

[Rob Spoor]

Sending from where and sending to where?

[Tom Winn]

Send midi out of a port, and receive through a port, the midi device is just a simple midi analyser.

[David Newton]

What doesn't work?

[Tom Winn]

I keep getting MidiUnavailableException.

[David Newton]

Kinda hard to help.

[Tom Winn]

 import java.awt.event.*;
import javax.sound.midi.*;
import java.lang.String.*;
import java.lang.Integer.*;

public class MidiIOEvent implements ActionListener,
        Runnable {

        MidiIOGUI gui;
        Thread midiIOOut;
        Thread midiIOIn;

        public MidiIOEvent(MidiIOGUI in) {
            gui = in;
        }

        public void actionPerformed(ActionEvent event) {
            String command = event.getActionCommand();
            if (command.equals("SEND")){
                startmidiSend();
            }
            if (command.equals("RECEIVE")){
                startmidiReceive();
            }
        }

        void startmidiSend()
        {
            //write code here
            midiIOOut = new Thread(this);
            midiIOOut.start();
        }

        void startmidiReceive()
        {
            //write code here
            midiIOIn = new Thread(this);
            midiIOIn.start();
        }

       public void run() {
           String msg1String = gui.midiOutTextField1.getText();
           int msg1Int = Integer.parseInt(msg1String);
           
           String msg2String = gui.midiOutTextField2.getText();
           int msg2Int = Integer.parseInt(msg2String);
           
           String msg3String = gui.midiOutTextField3.getText();
           int msg3Int = Integer.parseInt(msg3String);
           
           String msg4String = gui.midiOutTextField4.getText();
           int msg4Int = Integer.parseInt(msg4String);
           
           String msg5String = gui.midiOutTextField5.getText();
           int msg5Int = Integer.parseInt(msg5String);
           
           String msg6String = gui.midiOutTextField6.getText();
           int msg6Int = Integer.parseInt(msg6String);           
           
           //Midi out thread
           Thread thisThread = Thread.currentThread();
           if (midiIOOut == thisThread) {
               
               ShortMessage sendMSG = new ShortMessage();
               sendMSG.setMessage(ShortMessage.NOTE_ON, msg1Int, msg2Int, msg3Int);
               long timeStamp = -1;
               Receiver sendRec = MidiSystem.getReceiver();
               sendRec.send(sendMSG, timeStamp);

           }

           if (midiIOIn == thisThread) {
               

           }

       }

    }   

Lines 65 and 67 produce the errors

[David Newton]

Stack trace might be helpful.

[Tom Winn]

How do I get one of those, I've only really been programming in java for about a week!!! I'm using netbeans.

[David Newton]

It's the thing that gives you the exception you posted above, but with the rest of the information.

(Also note that the exception documentation may provide you with a clue as to what's going wrong.)

[Tom Winn]

debug:
Exception in thread "Thread-3" java.lang.RuntimeException: Uncompilable source code - unreported exception javax.sound.midi.InvalidMidiDataException; must be caught or declared to be thrown
at MidiIOEvent.run(MidiIOEvent.java:72)
at java.lang.Thread.run(Thread.java:619)
BUILD SUCCESSFUL (total time: 9 seconds)
Is what I get from the output window, with the task window show:

unreported exception javax.sound.midi.InvalidMidiDataException; must be caught or declared to be thrown | MidiIOEvent.java | line 72 |
unreported exception javax.sound.midi.InvalidMidiUnavailableException; must be caught or declared to be thrown | MidiIOEvent.java | line 74 |

[David Newton]

That's a compilation error: fix your Java first, then deal with the MIDI. Check out Java exception handling in whatever resource you're using to learn Java, or search the web.

[Tom Winn]

The program works fine with out the midi code in, I've played around displaying the values from the textfields on the console output.

But thanks for the help... Will have to try and find a source that shows how to send midi.

[David Newton]

You're not understanding what I said: this has nothing to do with MIDI yet; your code isn't compiling because of Java errors. The message explains what's missing--you're neither catching, nor throwing, a checked exception.

[Rob Spoor]

You are running this from an IDE, right? David is right; always make sure that all (and I really mean all) compiler errors are gone before you run your application.

[Tom Winn]

Yeah, running it from the IDE... I honestly don't know how to fix this, I have been searching for a while and drawn up nothing... But I will keep searching till I can get an answer.

[Tom Winn]

Think i might have found the answer, try and catch!!