I wanted to try the JMonkey engine, so I downloaded the JMonkey sdk, but I don't want to work in the JME IDE, I would rather like to work with Eclipse, since I already started a game project there, and I only want to replace the game engine(the code is modular, so i can do that) form pure LWJGL to JME. I found this tutorial: http://hub.jmonkeyengine.org/wiki/doku.php/jme3:setting_up_jme3_in_eclipse But that won't work, when I add the jar-s then there is no com.jme3.app.SimpleApplication anywhere there, as the tutorial suggests. Also where are the correct native files? I googled, but I can't find any example projects of Eclipse, or any decent explanations how to set up JME in Eclipse properly.
Problem solved, I downloaded an older version of JME by accident. I now downloaded the proper version, and I did exactly as the tutorial said, and it worked. Sorry for bothering.