Please help with a downloaded program! ;)

[Thirrum]

Hello,

I'm not a Java programmer, but i recently downloaded a program (Crossroad/Simple Traffic Animation) and I have a difficulty starting it ;( it shows an error:

I would really appreciate any help, maybe I need some kind on different java runtime environment or it is error within this program and nth can be done...
Anyway thank You for Your time ;)

All the best!

[pbrockway2]

Hi Thirrum. Your question is not really what this forum is for (help with Java program development, rather than end user support), however...

The problem seems to be that the class files (which make up a Java program) are invalid in some way. I notice that the program you are trying to run is really quite old (1.1.6) and there are known compatibility problems with programs compiled then and run now. Basically the Java runtime has been made more strict about what it considers valid code. (The problem is documented, eg, in the 1.4.2 Deployment Guide).

It is always worth making sure you have the lastest version of the Java runtime. (From Oracle's site). And if you know anybody who is successfully using the program you could find out what version they are using.

It's a long shot, but perhaps someone at the University of Applied Sciences, Trier would be prepared to recompile the program (which is what the deployment Guide recommends doing). The source code is not available from that site, however, and that doesn't leave you with a lot of options.