Ubuntu fonts are great, which Linux are you talking about and is this recent as in the last 5 years experience or is it qualified non-sense on your part?
>> Just look at Intellij IDEA in ubuntu for example.
I have, I'm not impressed overall though on Ubuntu the fonts are fine. I stick with Eclipse because SWT was and is a brilliant idea, the widgets don't just look native, they _are_ native.
That bears repeating, with SWT, the widgets don't just look native, they _ARE_ native.
Swing does its own font rendering, so the fonts look wrong[0] on every platform.
[0] Where "wrong" means "different from what is expected on the platform" – until we get higher-resolution screens font rendering is a compromise between sharpness and correctness-of-shape; different platforms make different choices; users adjust to the specific choices their platform has made. To observe this in the wild, read any discussion of Safari on Windows.
It's a wonderful editor but I can't use it since it is almost not readable.