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find particular characters within a String ?

 
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How to find particular characters within a String ? indexOf() (or) contains() (or) any other optimized way ? Which is the best option ?
 
kri shan
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If i use indexOf(), can i find last occurrence of a character or a substring in the invoking string (or) can i use lastIndexOf() ?
 
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Also, please look at regex.
 
Prashant Ladha
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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.
 
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