I wrote a screencapture-ambilight program which gets the average color of some areas on the desktop and sends these values to an arduino.

It is working just fine but when I export it as an applet, I get an exception.

I figured out, that it was the Serial-communication which caused the exception so I wrote this small test-sketch:

2. import processing.serial.*;
3. 
   
4. Serial arduino;
5. 
   
6. void setup()
7. {
8.   println(Serial.list());
9.   arduino = new Serial(this, Serial.list()[0], 9600);
10. }
11. 
    
12. void draw()
13. {
14.   arduino.write("Test");
15.   delay(1000);
16. }

As expected it works in the processing-environment but when I export it I get "a java exception has occured"

This is what the debugging of the .jar file is showing:

I have no Idea what I should do, my java is up to date and the code always works in the processing-environment..

I appreciate your help. :)