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]
  • Character class intersection
    [\w&&[^\d]]
  • 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

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "<script([\\s\\S]*?)>([\\s\\S]*?)<\\/script>"; final String string = "<template>\n" + " <div :class=\"classObj\" class=\"app-wrapper\">\n" + " <div v-if=\"device==='mobile'&&sidebar.opened\" class=\"drawer-bg\" @click=\"handleClickOutside\" />\n" + " <sidebar class=\"sidebar-container\" />\n" + " <div :class=\"{hasTagsView:needTagsView}\" class=\"main-container\">\n" + " <div :class=\"{'fixed-header':fixedHeader}\">\n" + " <navbar />\n" + " <tags-view v-if=\"needTagsView\" />\n" + " </div>\n" + " <app-main />\n" + " <right-panel v-if=\"showSettings\">\n" + " <settings />\n" + " </right-panel>\n" + " </div>\n" + " </div>\n" + "</template>\n\n" + "<script>\n" + "import RightPanel from '@/components/RightPanel'\n" + "import { AppMain, Navbar, Settings, Sidebar, TagsView } from './components'\n" + "import ResizeMixin from './mixin/ResizeHandler'\n" + "import { mapState } from 'vuex'\n\n" + "export default {\n" + " name: 'Layout',\n" + " components: {\n" + " AppMain,\n" + " Navbar,\n" + " RightPanel,\n" + " Settings,\n" + " Sidebar,\n" + " TagsView\n" + " },\n" + " mixins: [ResizeMixin],\n" + " computed: {\n" + " ...mapState({\n" + " sidebar: state => state.app.sidebar,\n" + " device: state => state.app.device,\n" + " showSettings: state => state.settings.showSettings,\n" + " needTagsView: state => state.settings.tagsView,\n" + " fixedHeader: state => state.settings.fixedHeader\n" + " }),\n" + " classObj() {\n" + " return {\n" + " hideSidebar: !this.sidebar.opened,\n" + " openSidebar: this.sidebar.opened,\n" + " withoutAnimation: this.sidebar.withoutAnimation,\n" + " mobile: this.device === 'mobile'\n" + " }\n" + " }\n" + " },\n" + " methods: {\n" + " handleClickOutside() {\n" + " this.$store.dispatch('app/closeSideBar', { withoutAnimation: false })\n" + " }\n" + " }\n" + "}\n" + "</script>\n\n" + "<style lang=\"scss\" scoped>\n" + " @import \"~@/styles/mixin.scss\";\n" + " @import \"~@/styles/variables.scss\";\n\n" + " .app-wrapper {\n" + " @include clearfix;\n" + " position: relative;\n" + " height: 100%;\n" + " width: 100%;\n\n" + " &.mobile.openSidebar {\n" + " position: fixed;\n" + " top: 0;\n" + " }\n" + " }\n\n" + " .drawer-bg {\n" + " background: #000;\n" + " opacity: 0.3;\n" + " width: 100%;\n" + " top: 0;\n" + " height: 100%;\n" + " position: absolute;\n" + " z-index: 999;\n" + " }\n\n" + " .fixed-header {\n" + " position: fixed;\n" + " top: 0;\n" + " right: 0;\n" + " z-index: 9;\n" + " width: calc(100% - #{$sideBarWidth});\n" + " transition: width 0.28s;\n" + " }\n\n" + " .hideSidebar .fixed-header {\n" + " width: calc(100% - 54px)\n" + " }\n\n" + " .mobile .fixed-header {\n" + " width: 100%;\n" + " }\n" + "</style>"; 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