Not really. It's actually kind of funny that a .NET programmer said that because Java and C# occupy many of the same niches, which is to say, heavy enterprise-y

Not really. It's actually kind of funny that a .NET programmer said that because Java and C# occupy many of the same niches, which is to say, heavy enterprise-y apps. But then that may be his point, that it would be redundant for him to learn a language so similar. Java isn't a bad decision but I 100% believe you should try as many languages as possible, especially from different paradigms. Every language has something to like and most have something you can bring back to your primary language to be more productive. Happy trails!