I am using Intellij Idea. We have build tool (ant) to build project, but sometimes (especially during debug) I use Idea to compile classes. The problem is classes, that are compiled by ANT are recompiled after pressing Ctrl+F9. This is not good at least because our project is big enough and it take a lot of time to recompile everything twice. Also there are some troubles because of this in case of using Hot Swap. Is it possible to avoid this problem and make it possible to tell Idea to use compiled classes if they are older, then source code file?