This doesn't handle null check . what is str is null ? your code throws NullPointerException

It's for case insensitive, so you don't need to declare the upper case or lower case on the pattern.

zeta zeta zeta

I wrote 10 separate replace statements lmao

I always forget that you can do this in one return statement and end up creating a new string first. Bravo!

Titsnium, yeah, it's so easy but mind-blowing.

Jesus Christ, well ya learn something new everyday, I just learned you could do this.

Bruh I spent hours tryna use a flippen bubble sort -ish to go through every letter to check if its a vowel, and I could've just done this?? Thank you

This is sick, had no idea you could just replace like that :)

dh! yr sltn n't p t th mrk, mn srsly, wtf s tht??

Very nice... I was just forgetting the RE (plus a bit of stream know how)