You're right, but not everybody wants

- install a complete java development kit
- download the source distribution
- go thru the build process
- set up the classpath

just to change a single bit ! Altering the Bytecode can be an
alternative when there's nothing new to code just
to alter existing functionality...

And by the way it is often the faster method, because
everything is already on your harddisk, ....

But if you are a jaaa-vaaa guy just hitting compile is ok ...

Yours
Cg1h3r0