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  1. #1
    BMF is offline Member
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    Jul 2011
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    Default Pattern problem (capturing groups)

    Hi all,

    I am trying to match strings that consist of two identical vowels. This should be a super-easy task, but somehow it doesn't work. My regular expressoin is "([aeiou])\1".

    The following statement returns false:

    Pattern.matches("([aeiou])\1", "aa");

    Can anyone help? It is my first time using capturing groups so I may be doing something wrong. However, the examples I read here seem to indicate I am doing it fine?

    Thanks in advance.

    EDIT: Oh nevermind, I just needed to escape the backslash... "([aeiou])\\1".
    Last edited by BMF; 07-14-2011 at 12:57 PM.

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