Anyone knows how to create whole program in a single file or interface in eclipse IDE for java either creating different files ?

Question

I mean different classes files?? I want the whole program to be written in a single file ??

Answer 1

but why?

at the end you'll export is as a single .jar file anyways

Answer 2

@jeremy I'm not a professional programmer I'm just a learner and there are short programs which I write and it's irritating to make different classes ??