How can I develop in Java and still use Unreal Engine 4?
Do you have to use a wrapper (I have heard something about this), do I have to modify the source code that comes with purchase or is there a plugin out there that I can use?
http://jmonkeyengine.org/ seems good and I love the IDE (and the SDK itself), but I cannot get over having to place objects on certain coordinates.
There is, as of this moment time, no Java support on the Unreal Engine. There is a C# plugin available however, you could probably explore how they accomplished it if you plan on making your own wrapper.