IntelliJ IDEA tip: check regular expressions right in the IDE

Photo by Hedgehog Digital on Unsplash

I’m going to be upfront about this: I don’t understand regular expressions, or “regex” (sometimes “regexp”). I know they can be very powerful and very useful. Just don’t ask me to write one from scratch.

If you’re a Java programmer, you probably know about String’s indexOf() function. That one works great when you know the exact characters you’re looking for…