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Java regex non-capturing group "?:"

wade-case 2013-10-22 01:53 原文

  1. see: http://stackoverflow.com/questions/3512471/non-capturing-group
  2. usage:  
    (?:http|ftp)://([^/\r\n]+)(/[^\r\n]*)?
  3. Match "http://stackoverflow.com/"
     Group 1: "stackoverflow.com"
     Group 2: "/"

Match "http://stackoverflow.com/questions/tagged/regex"
     Group 1: "stackoverflow.com"
     Group 2: "/questions/tagged/regex"

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