I have a program I want to make into a jar file, so I did that with bluej, and the jar's size is very large, like 400MB. Not even Windows is that big.

One of my friends told me that I can create it with Eclipse, and it would be smaller. But I don't know if that's actually practical, since there's not that much info on it when you Google it (thus conclusion, there's a better way to do it).

Currently I'm trying trying that though, maybe I'll get it to work. But in the meantime if there is a better way, would someone point me in the right direction?