find particular characters within a String ?

[kri shan]

How to find particular characters within a String ? indexOf() (or) contains() (or) any other optimized way ? Which is the best option ?

[kri shan]

If i use indexOf(), can i find last occurrence of a character or a substring in the invoking string (or) can i use lastIndexOf() ?

[Prashant Ladha]

Also, please look at regex.

[Prashant Ladha]

Originally posted by kri shan:
If i use indexOf(), can i find last occurrence of a character or a substring in the invoking string (or) can i use lastIndexOf() ?

yes, with lastIndexOf(String) you would get the last occurrence of that string.