This week's book giveaway is in the Java 9 forum. We're giving away four copies of Java 9 Modularity: Patterns and Practices for Developing Maintainable Applications and have Sander Mak & Paul Bakker on-line! See this thread for details.
Petr, can you post a small, complete program that others can compile and run to see your problem? That really helps a lot when we try to assist you.
"Il y a peu de choses qui me soient impossibles..."
posted 1 year ago
During the runnable sample and icon preparation I have found that when I was saving the picture icon I have saved it as jpeg so the transparency information has been lost. I did not noticed this because the background of picture is the same as app background.