Are Java apps really that portable... ?!

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http://www.linuxquestions.org – Hi I have stumbled in this http://www.archimedes.org.br/ it is a 2D CAD package built in Java for Linux, Mac and win... Quote: Archimedes works on GNU/Linux, Mac OS X and Windows and it only requires you have a Java Virtual Machine installed which is also a free software. This means that anything generated with Archimedes is easily recoverable and reused. ... allright... So i get the .jar package from Sourceforge, http://sourceforge.net/projects/arqu...p.jar/download, try to run this with Code: $java -jar archimedes-0.8.1-setup.jar and i get a (HowTos)