We recommend downloading the - but of course you can also build the jMonkeyEngine yourself from the sources. You need Subversion installed.
svn checkout http://jmonkeyengine.googlecode.com/svn/trunk/engine jme3
ant jardist/jMonkeyEngine3.jar and dist/libs/*ant javadoc dist/javadoc directory.ant rundist/jMonkeyEngine3.jar and all JARs from the dist/lib directory on the classpath.com.jme3.app.SimpleApplication. Learn more about: