[L33thaxorc0der]

Any language can be reverse engineered or cracked if the person knows what they are doing.

[๖ۣۜDream]

Yes, Java isn't that difficult to reverse, it's easier than .NET...

[hex0.]

If I was to create a package that did a magical calculation on a variable, such as

Code

import.custom.magical.calculation; being my custom package

final byte amountOfPizza = 10;
double amountOfMagicalPizza = magical.calculation(amountOfPizza);

The normal java api wouldn't understand my custom package and the class magical.calculation apart of said package.

When the jvm coverts to bytecode and runs from My machine with the custom package installed, my machine knows what to do.

If I was to move this to another machine, it wouldn't as it couldn't find the package custom.

To get around this, the creation of a .jar file is needed.

This is a really rough demo, iv'e obviously missed out the layout, syntax and headers. I've just recently learned this and i could be completely wrong, If so could you show me where.