Although a similar question has been asked once before (how to make frame undecorated after jTattoo theme installed), but I'm unable to follow the solution to solve the problem. I didn't find the instruction is clear enough and hence failed many tries.
I want an undecorated JFrame (and not only on fullscreen mode), but using any of the jtattoo themes unable me to do so.
Is there any way I can get my JFrame to be undecorated while using a jtattoo theme?
来源：https://stackoverflow.com/questions/43034911/how-to-undecorate-jframe-while-using-jtattoo