Q:

Eclipse - black background in javadoc popup

I am using Elementary OS, based on Ubuntu 12.04 and Eclipse Luna.
The background color of javadoc popups is black and font color is dark grey, so it is unreadable. 
I tried to change background in eclipse preferences, but it did not change.
Then I used google, and found solution, that I need to change tooltip bg color. So I did it. But still no change.
Anyone knows how to change that color ? 

A:

I had the same problem with Ubuntu 16.04 and Eclipse Mars. I solved the problem by adding the following lines in eclipse.ini :

--launcher.GTK_version
  2

