Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: markspace Newsgroups: comp.lang.java.programmer Subject: Re: Debugging regexes Date: Fri, 25 Apr 2014 00:17:16 -0700 Organization: A noiseless patient Spider Lines: 20 Message-ID: References: <1q2dnYufsIxhvMTOnZ2dnUVZ8iudnZ2d@giganews.com> <8mkjl9tia53ot69tpsqurnnfslq3ivgg26@4ax.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Fri, 25 Apr 2014 07:17:21 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="9358cda03e1e0dfd3c4b757daa608707"; logging-data="7976"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19zVuoQ5xnyZmdh8K6dz/+i2FLtkiAEhM8=" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 In-Reply-To: <8mkjl9tia53ot69tpsqurnnfslq3ivgg26@4ax.com> Cancel-Lock: sha1:2KCtzxS5SmWiPSUPMT0brZay30A= Xref: csiph.com comp.lang.java.programmer:28221 On 4/24/2014 8:21 PM, Roedy Green wrote: > Those are good tips. I often define named constants and build my > regexes out of trusted bits. > > My two most common errors are: > forgetting to quote something like - . ( ) $ > using \\ when I should have used \ and vice versa. Sometimes I build > regexes in files, sometimes in Java source. A new Java 8 annotation checks regex syntax: @Regex – Provides compile-time verification that a String intended to be used as a regular expression is a properly formatted regular expression https://blogs.oracle.com/java-platform-group/entry/java_8_s_new_type