Does putting Java source files into a JAR increase the JVM's RAM consummed?

Question

If not, why not always include sources file into "open source" JAR distributions ? (thanks in advance if you have some official weblinks that explain your answers)

Answer 1

No, it does not increase the memory consumption. And it's not done because it would increase the size of the JARs without providing any advantage to most users. And no, the JAR size is not irrelevant. It might not matter to you whether the download is 5 or 7 MB, but it matters quite a lot to whoever has to pay for the bandwith of 100,000 people downloading it.