Will Java compiled in windows work in Linux?

Question

My Java program is in working order when i use it under Windows(Eclipse and Bluej). I compress it to a Jar and send it to my red hat and bang. nothing works. It breaks on the weirdest things, such as text field set text will not show, JPasswordfield just disappeared, Java AWT ROBOT dies too... the list goes on, first i thought it must be my Linux JRE is out of date, but i installed latest JRE then the JDK with no improvement at all. I have a feeling that i miss understood the Java cross plat ability. I also tried to remove all of my functions and guts to see what is breaking but it seems every second thing is breaking, other than the some of the major GUI components and most of the back end stuff. basically any thing that uses some thing fancy will blowup in my face, such as making a text field in to a password field...

This is my first time posting ;) please be nice to the newbie!

Thanks!!!

SOLVED!!! Yay. Problem solved!!! It was because my Java path isn't set, so my GCC/GCJ jumped in instead of my oracle java, even tho i used java -jar xxx.jar. so I put in the java directory path from of my java -jar xxx.jar and worked like a charm. unless you set the path, you have have to do this manually

/usr/java/jdk1.6.0_21/jre/bin/java -jar xxxxx.jar

java -version to check if your real java is running or if it s still GCJ

Answer 1

Yes. The class and jar formats are intentionally crossplatform.

Are you absolutely certain that your jar file was copied correctly to your Linux machine? If you used ftp, it is crucial to use binary instead of ascii transfer.

Answer 2

Linux users often run java programs with gcj instead of java. Check that you use a correct executable.