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
No Match

r"
"
gm

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 = "Hub\\.config\\.set\\('\\w*',\\s*(\\{[\\s\\S]*\\})"; final String string = "Hub = {};\n" + "Hub.config = {\n" + " config: {},\n" + " get: function(key) {\n" + " if (key in this.config) {\n" + " return this.config[key];\n" + " } else {\n" + " return null;\n" + " }\n" + " },\n" + " set: function(key, val) {\n" + " this.config[key] = val;\n" + " }\n" + "};\n\n" + "Hub.config.set('sku', {\n" + " valCartInfo : {\n" + " itemId : '576938415361',\n" + " cartUrl: '//cart.mangolane.com/cart.htm'\n" + " },\n" + " apiRelateMarket : '//tui.mangolane.com/recommend?appid=16&count=4&itemid=576938415361',\n" + " apiAddCart : '//cart.mangolane.com/add_cart_item.htm?item_id=576938415361',\n" + " apiInsurance : '',\n" + " wholeSibUrl : '//detailskip.mangolane.com/service/getData/1/p1/item/detail/sib.htm?itemId=576938415361&sellerId=499095250&modules=dynStock,qrcode,viewer,price,duty,xmpPromotion,delivery,upp,activity,fqg,zjys,amountRestriction,couponActivity,soldQuantity,page,originalPrice,tradeContract',\n" + " areaLimit : '',\n" + " bigGroupUrl : '',\n" + " valPostFee : '',\n" + " coupon : {\n" + " couponApi : '//detailskip.mangolane.com/json/activity.htm?itemId=576938415361&sellerId=499095250',\n" + " couponWidgetDomain: '//assets.mgcdn.com',\n" + " cbUrl : '/cross.htm?type=weibo'\n" + " },\n" + " valItemInfo : {\n\n" + " defSelected: -1,\n" + " skuMap : {\";20549:103189693;1627207:811754571;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4301611864655\",\"oversold\":false},\n" + " \";20549:59280855;1627207:412796441;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4432149803707\",\"oversold\":false},\n" + " \";20549:59280855;1627207:196576508;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4018119863100\",\"oversold\":false},\n" + " \";20549:72380707;1627207:28341;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4166690818570\",\"oversold\":false},\n" + " \";20549:418624880;1627207:28341;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4166690818566\",\"oversold\":false},\n" + " \";20549:418624880;1627207:196576508;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4018119863098\",\"oversold\":false},\n" + " \";20549:72380707;1627207:3224419;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4166690818571\",\"oversold\":false},\n" + " \";20549:147478970;1627207:196576508;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4018119863094\",\"oversold\":false},\n" + " \";20549:72380707;1627207:384366805;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4432149803708\",\"oversold\":false},\n" + " \";20549:296172561;1627207:811754571;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4301611864659\",\"oversold\":false},\n" + " \";20549:72380707;1627207:1150336209;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4301611864664\",\"oversold\":false},\n" + " \";20549:147478970;1627207:93586002;\":{\"price\":\"528.00\",\"stock\":\"2\",\"skuId\":\"4018119863095\",\"oversold\":false}}\n" + " ,propertyMemoMap: {\"1627207:811754571\":\"黑色单里（预售） 年后2.29发货\",\"1627207:93586002\":\"黑色加绒 现货\",\"1627207:412796441\":\"黑色（兔毛） 现货\",\"1627207:384366805\":\"米白色（兔毛） 现货\",\"1627207:3224419\":\"驼色 现货\",\"1627207:1150336209\":\"驼色单里（预售） 年后2.29发货\",\"1627207:28341\":\"黑色 现货\",\"1627207:196576508\":\"驼色加绒 现货\"}\n\n\n" + " }\n" + "});"; 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