Assigning Threads on Multiprocessor?

[DrRufus]

Hello,
I am converting a single threaded application into a multithreaded one in hopes of concurrently executing sections of the code on a multiprocessor. I've created threads for the sections that should be executed on the different processors but I don't think multiple processors are being assigned to the code chunks. The multiprocessor system is Unix based and I use the generic "java Main" command to execute the class with main(). Is there a special command that I have to use in order to assign the threads to the multiprocessors?
Thanks in advance!

[levent]

As far as i know, the assigning is done automatically in JVM and there is no command for that. You can check Thread class javadoc and documentation of java command with "java -help".