Using java classes -- where do system.out message go?

Finally got my jar file to import in Forms 11Gr2.When I click my form button that executes the java methods,  It crashes somewhere in my code and every message (system.out) I did in my java is not getting sent to the jvm console. 

Running weblogic 11g localy and executing a forms 11gr2 .fmx.

Where do java system.out messages go?    log file somewhere???

Verified all opened jvm console and nothing is getting there...made sure no jvm conole are still hidden.

Thanks