Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Can anyone give me a Java regex to identify repeated characters in a string? I am only looking for characters that are repeated immediately and they can be letters or digits.
abccde <- looking for this (immediately repeating c’s)
abcdce <- not this (c’s seperated by another character)
Try
'(\\w)\\1+'The
\\wmatches any word character (letter, digit, or underscore) and the\\1+matches whatever was in the first set of parentheses, one or more times. So you wind up matching any occurrence of a word character, followed immediately by one or more of the same word character again.(Note that I gave the regex as a Java string, i.e. with the backslashes already doubled for you)