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Find String that contains a given substring ignoring case

 
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How to find a string that contains given substring ignoring case?
I have used following code. But it considers the case.


 
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A possible option would be, to first convert your base String to lowercase(or uppercase) and then use substring on it.
 
Udaya Wijenayake
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Thanks vinoth, I got it
 
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Using regex is overkill for such a simple requirement.
 
Seetharaman Venkatasamy
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Darryl Burke wrote:Using regex is overkill for such a simple requirement.



but it is flexible . what could you do if the string needs to be lowercase? you need to apply one more condition right?
 
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But that isn't the requirement. Using a regex *is* overkill for the requirement as stated.
 
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But calling toUpperCase() on a large String (several thousands characters) may have a negative impact on memory usage. This is one of those cases where you must make a trade off between better speed (toUpperCase(), contains()) and less memory (Pattern). If this operation is needed many times reusing a Pattern object may even be better.
 
David Newton
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Meh--if the file name has thousands of characters I'd suggest there's a different problem waiting in the wings.
 
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