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Every now and then a “hardcore” programmer comes and mocks you for using a “sissy” tool like Eclipse or IntelliJ. Real programmers use emacs and vim. If you are lucky and the other developer has some arguments and social skills, you are not mocked, but rather explained how you are wasting a lot of precious time with your IDE and once you get used to emacs or vim, you’ll realize how irreplaceable they are – it will be like going into the 3rd dimension and wondering how you’ve ever lived in 2D. Zoom out. Eclipse and IntelliJ are pretty much Java-oriented (though there are plugins for other languages). So if you are using ruby, python, php, or whatever, then probably emacs is the best thing you can get. But let’s see what you absolutely need your editor/IDE to do for Java: