My Java isn't right.

Somebody help me.

I've been experienced a very weird behaviour from Java.

I was creating a simple JFrame, JButtons and Images, and everytime I had to execute it, I had to resize manually the window to make every elements appear. Simply like that.

Is this because Apple wants to avoid Java??? I've re-installed the JDK 8 and 7u51 but it still goes that way.

Thanks.