And why are all these companies ignoring the fact that there is a shortage of Ruby and Python developers because most college students are learning Java? I'll

And why are all these companies ignoring the fact that there is a shortage of Ruby and Python developers because most college students are learning Java? I'll answer your other question as it seems to have been ignored: I don't think anyone is actively ignoring these other great languages. It has more to do with inertia. Once a company invests X in their software (where X can be 100K to 100M), they're reluctant to throw that away when it works. We as engineers may like the hot new thing, but the company having paid for the hot old thing isn't just going to throw it out because you don't like it anymore. :) This is why we had the Y2K problem from a massive investment in COBOL. We'll have other issues from a massive investment in Java over the next few decades as well. It is what it is. Learn Java. Learn Play. Learn Ruby, Python, PHP, C#, whatever you want to learn. You'll be learning all your career. The more languages you know, the better a developer you will be. Embrace it now, forever will it dominate your destiny.