What's your definition of "proprietary?" All of the major IDEs are open-source in their free editions. I mean, more seriously, I get it: you have a bee in your

What's your definition of "proprietary?" All of the major IDEs are open-source in their free editions. I mean, more seriously, I get it: you have a bee in your bonnet and you will find any reason possible to avoid it. VIM 4EVA and all that, raise your fist and yell. But I wouldn't even bother with Java as any serious endeavor if I were you; a lot of employers will ask your preference of IDE just to get a sense of who you are as a programmer, and will hide their giggles when you say "I use emacs/vim/notepad++ like a BAWSSSS!" and move on to the next candidate who'll get the performance magnifier of a common and free tool.