The IDEs support incremental recompilation and it usually takes at most a couple of seconds - unless your project is huge and you work on some core module on wh

The IDEs support incremental recompilation and it usually takes at most a couple of seconds - unless your project is huge and you work on some core module on which everything else depends. That's not common in Java though (more common in C++ codebases, where people like to have for example their own custom collection classes).