Java junior must know regex?

Question

Java

How deep should the knowledge of regular expressions be for landing java ee joon?

Answer 1

IMHO (without IMHO the answer does not make sense, everything is subjective here) a junior should know the basics of regular seasons.
Metagroups, enumerations, grouping, quantification are the basics. If the applicant does not know them, then most likely he has little experience and he is most likely not a junior.
But deep knowledge (lookahead/lookbehind) and the ability to apply it are already optional.

Answer 2

We had a problem that can be solved with regular expressions, now we have two problems

but seriously, it depends on the project for which June will come

Answer 3

Understand the basics - yes, but you don’t need to purposefully train in writing regular expressions - during work they are not encountered so often and usually the existing ones are enough (validation for email, phone number, ip, etc.) - and if there is a need for something else - by that time you will already have at least some experience and it will be much easier to figure it out.
During the learning phase, it is better to devote time to other things.

Answer 4

At its core, this topic is so simple that asking the question "To teach or not to teach?" frankly, it's stupid. No, seriously, you've already spent more time on this question than you need in order to familiarize yourself with regular seasons to a level where you can not bathe.