Java Regex

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    class MyRegex{ String pattern ="((2[0-5][0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9])\.){3}(2[0-5][0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9])"; }