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

/
/
gm

Test String

Substitution

Processing...

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 = "(?:.*\\n){1} End Object"; final String string = "class a_u000_a extends Emitter; // 이상상태 (독)\n\n" + "defaultproperties\n" + "{\n" + " Begin Object Class=SpriteEmitter Name=SpriteEmitter1\n" + " Acceleration=(Z=-100.000000)\n" + " UseColorScale=True\n" + " ColorScale(0)=(Color=(B=140,G=64,R=135,A=255))\n" + " ColorScale(1)=(RelativeTime=1.000000,Color=(B=120,G=63,R=106,A=255))\n" + " ColorMultiplierRange=(X=(Min=0.800000),Y=(Min=0.800000),Z=(Min=0.800000))\n" + " FadeOutStartTime=1.080000\n" + " FadeOut=True\n" + " FadeInEndTime=0.120000\n" + " FadeIn=True\n" + " MaxParticles=20\n" + " RespawnDeadParticles=False\n" + " Name=\"Poison\"\n" + " StartLocationOffset=(Z=-3.000000)\n" + " StartLocationRange=(X=(Min=-8.000000,Max=8.000000),Y=(Min=-8.000000,Max=8.000000))\n" + " SpinParticles=True\n" + " SpinsPerSecondRange=(X=(Min=0.050000,Max=0.200000))\n" + " StartSpinRange=(X=(Max=1.000000))\n" + " UseSizeScale=True\n" + " UseRegularSizeScale=False\n" + " UniformSize=True\n" + " SizeScale(0)=(RelativeTime=0.100000,RelativeSize=3.000000)\n" + " SizeScale(1)=(RelativeTime=0.360000,RelativeSize=4.600000)\n" + " SizeScale(2)=(RelativeTime=1.000000,RelativeSize=6.000000)\n" + " StartSizeRange=(X=(Min=2.000000,Max=4.500000),Y=(Min=2.000000,Max=4.500000),Z=(Min=2.000000,Max=4.500000))\n" + " InitialParticlesPerSecond=30.000000\n" + " AutomaticInitialSpawning=False\n" + " DrawStyle=PTDS_AlphaBlend\n" + " Texture=Texture'LineageEffectsTextures.Particles.fx_m_t0089'\n" + " TextureUSubdivisions=2\n" + " TextureVSubdivisions=2\n" + " BlendBetweenSubdivisions=True\n" + " SubdivisionEnd=4\n" + " LifetimeRange=(Min=1.000000,Max=2.000000)\n" + " StartVelocityRange=(X=(Min=-80.000000,Max=80.000000),Y=(Min=-80.000000,Max=80.000000),Z=(Min=30.000000,Max=30.000000))\n" + " VelocityLossRange=(X=(Min=4.000000,Max=4.000000),Y=(Min=4.000000,Max=4.000000),Z=(Min=4.000000,Max=4.000000))\n" + " Name=\"SpriteEmitter1\"\n" + " End Object\n" + " Emitters(0)=SpriteEmitter'LineageEffect.a_u000_a.SpriteEmitter1'\n" + " bNoDelete=False\n" + " DrawScale=0.200000\n" + "}"; final String subst = " End Object"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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