Is the Unity IDE written in Java?

I was experiencing problems with Java a while ago and Unity was also affected by the problem. I had a wrong version of Java on my computer with the wrong graphics driver and only Java went wrong. It caused black screens in the GUI of Unity.

So I was wondering. Is the Unity IDE maybe written in Java to make it cross platform? Just curious.

NO, Unity itself is written in C/C++ , I read this somewhere in the docs that come with Unity...