java - Learning how to use build tools instead of an IDE. Confused on how debugging fits in -

when i'm using ide, can write source code, , press button build , debug code, , have ability step through it.

but workflow when using build tool along side of ide when comes debugging? how people debug code in ide if build projects using build tool?

i feel i'm missing simple here.

i'm using eclipse , ant if matters.

thanks

eclipse (and other ides) can attach running java processes, if not started ide. see attach debugger application using eclipse

using suspend=y can wait debugger attach.