PLEASE ANYONE HERE TO EXPLAIN TO ME MORE ABOUT HASHMAPS in Java

Question

Topics Like HasMaps, HashSet, and ArrayList Sololearn only briefly explain them in the course section, but I can't seem to understand and comprehend the course well.

I tried to get some source code but what I found there was devastating and depressive.

It looks like I didn't even learn anything.

Thanks to sololearn I was able to have the ideas though.

But can you Please recommend any website or YouTube channel or even any PDF book that can make me stand out.🙏

And please drop your highly appreciated comment or links that can also make me understand more.

It can also help a fellow developer facing same thing 🙏🙏

Answer 1

https://code.sololearn.com/W71i1t1MPVp6/?ref=app