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Regular expression help needed

Prashant Langade
Ranch Hand

Joined: Jul 01, 2009
Posts: 71

I dont have much knowledge of Regular expressions.

My requirement is to match the string starting and ending with underscore i.e "_"

that means

if i have strings as
1> _abc_

then only _abc_ and _pqr should be able to match the pattern.
Can any one please help me?
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 41107
Something like "^_.*_$" should do the trick.

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Eoin Brosnan
Ranch Hand

Joined: Dec 12, 2009
Posts: 37
Ulf Dittmer wrote:Something like "^_.*_$" should do the trick.

"^_.*_$" will also match __ (two underscores, with no string). If you don't want that then just replace the *(which means zero or more) with +(which means at least 1 or more). "^_.+_$"
It is sorta covered in the JavaRanch Style Guide.
subject: Regular expression help needed
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