I've never built a large Java project; I come from the Node/JS world. And so, I'm wondering if there should be built JARs in this source? I've merged PRs that only updated the JARs to new versions. With NPM, there would never have been cause for this. Is there a way in a Java project to not include JARs checked in to the source, but to rather build them dynamically. I've read about this thing called maven? Any ideas?