Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "「\\S*?」"; final String string = "　　忽聽得遠處嘯聲又起，一個聲音叫道：「西山一窟鬼奉神鵰俠之令，來向郭二姑娘祝壽，恭獻壽禮。」聲音尖細，若斷若續，但人人聽得十分清楚。\n\n" + "　　郭靖見第一件壽禮實在太大，忙提聲叫道：「郭靖謹候台駕。他話聲渾厚和平，遠遠傳送出去，跟著走到大校場入口處相迎。\n\n" + "　　黃蓉和他並肩而立，低聲道：「你猜這神鵰俠是誰？郭靖道：「我猜不出。」黃蓉道：「便是楊過！」郭靖一呆，隨即滿心歡暢，說道：「了不起，了不起！他立下如此奇功，當真是大宋之福。」黃蓉道：「你猜他第二件壽禮是甚麼？」郭靖微笑道：「過兒才智卓絕，只有你方勝得了他，也只有你，才猜得中他的心思。」黃蓉道：「這一次我可猜不中了。」心想：「楊過為襄陽立此大功，但口口聲聲說是為了襄兒，他對我夫婦與芙兒的怨恨可絲毫未消。」"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); while (matcher.find()) { System.out.println("Full match: " + matcher.group(0)); for (int i = 1; i <= matcher.groupCount(); i++) { System.out.println("Group " + i + ": " + matcher.group(i)); } } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html