How to use Regular Expression in Kotlin?

Question

I know I have to create a pattern in Regular Expression Syntax and then I can match it with the actual string. But I want to extract the match from the String and save it to a variable. How can I do that in Kotlin?

Answer 1

This gives an example of getting the range which can be used to generate a substring.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/-regex/find.html

Answer 2

You can use (C|c) to match both cap and lower. There is also a flag to make search ignore case.

Answer 3

https://code.sololearn.com/cFywKzFp2mVS/?ref=app

Can you tell me why this code is throwing a null pointer exception

Answer 4

Ok I got it!! Regex is Case sensitive

Answer 5

Did I put a wrong Regular Expression Syntax ?????