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No offense, but Swing shouldn't cause such issues. Might want to check the documentation again. Mind if I ask why you chose Java in the first place?

That is the only language i can say i know apart from the old Fortran77. 

Java as a GUI featuring language and its ability to make objects and then even return objects back from a method, just amazes me.

How i see is you define your own objects to meet your needs...

Are there any platforms, you might suggest i try & learn.

I know i am no Carmack, and will not go near to making an Engine.

Thank you for your interest.

PS: Java did another strange thing before: it did not accept dot notation but comma notation in the input of doubles.

Also when it is Strings, and you do reference a String in a method. It remains unchanged when bacj from the method.

I cannot say deficiencies as i am a mere programmer. But Java has some let downs. I know...

Have you checked my " Floating Numbers Base Converter " i was the only one from my country to have it as an applet when was functional.

Just cut-the-knot owner has such an applet. Not many have invested time on that subject.