Black Chrome windows are often, but not always, a symptom of a version mismatch between the X11 video driver and the kernel video driver. I've found that, amongst the programs I use regularly, Chrome was by far the most sensitive to such mismatches. Such a mismatch usually happens after doing a partial system upgrade. Finishing the upgrade and rebooting (to get the new kernel driver) solves the problem, if a driver mismatch was the cause.

Google chrome and chromium black window
I want to write my first Java program, for example Phonebook, and I wonder what to do first. My question is should I write GUI classes first or util classes first?
I am database developer and want to know best practice in building program.
