Debian, Eclipse and Java8 - error cannot register existing type GdkDisplayManager

If you got this error on start Eclipse Mars - cannot register existing type GdkDisplayManager - modify you eclipse.ini
add two strings:

before:
....

--launcher.defaultAction
openFile
--launcher.appendVmargs
-vmargs
....

after:
....
--launcher.defaultAction
openFile
--launcher.GTK_version
2
--launcher.appendVmargs
-vmargs
....