recommended IDE for developing openjdk?

[Clemens Eisserer]

Hi,

About 10 years ago I used eclipse to work on OpenJDK, however I would like
to get rid of it because of its slow/ugly user interface.
I wonder, are there any recommendations which IDE to use these days?
I gave IntelliJ a try but having not used it that much (except for some
fairly standard maven based projects) I failed to configure it correctly,
however I haven't tried Netbeans still.

So to make it short: Which IDE is known to cope well with working on the
OpenJDK codebase?
And are there detailed instructions available for creating an openjdk
project with intellij?
Or would I be better off using netbeans?

Thank, Clemens