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

/
/
gm

Test String

Substitution

Processing...

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 = "^(1[0-5]|0[0-9]|[0-9])(?:\\.([0-9]{1,2}))$"; final String string = "11.89\n" + "16.35\n" + "15.99\n" + "16.00\n\n" + "6.12\n" + "7.12\n" + "8.21\n" + "9.21\n" + "06.21\n" + "07.12\n" + "08.21\n" + "09.21\n\n" + "0.00\n" + "0.01\n" + "0.02\n" + "0.03\n" + "0.04\n" + "0.05\n" + "0.06\n" + "0.07\n" + "0.08\n" + "0.09\n" + "0.1\n" + "0.11\n" + "0.12\n" + "0.13\n" + "0.14\n" + "0.15\n" + "0.16\n" + "0.17\n" + "0.18\n" + "0.19\n" + "0.2\n" + "0.21\n" + "0.22\n" + "0.23\n" + "0.24\n" + "0.25\n" + "0.26\n" + "0.27\n" + "0.28\n" + "0.29\n" + "0.3\n" + "0.31\n" + "0.32\n" + "0.33\n" + "0.34\n" + "0.35\n" + "0.36\n" + "0.37\n" + "0.38\n" + "0.39\n" + "0.4\n" + "0.41\n" + "0.42\n" + "0.43\n" + "0.44\n" + "0.45\n" + "0.46\n" + "0.47\n" + "0.48\n" + "0.49\n" + "0.5\n" + "0.51\n" + "0.52\n" + "0.53\n" + "0.54\n" + "0.55\n" + "0.56\n" + "0.57\n" + "0.58\n" + "0.59\n" + "0.6\n" + "0.61\n" + "0.62\n" + "0.63\n" + "0.64\n" + "0.65\n" + "0.66\n" + "0.67\n" + "0.68\n" + "0.69\n" + "0.7\n" + "0.71\n" + "0.72\n" + "0.73\n" + "0.74\n" + "0.75\n" + "0.76\n" + "0.77\n" + "0.78\n" + "0.79\n" + "0.8\n" + "0.81\n" + "0.82\n" + "0.83\n" + "0.84\n" + "0.85\n" + "0.86\n" + "0.87\n" + "0.88\n" + "0.89\n" + "0.9\n" + "0.91\n" + "0.92\n" + "0.93\n" + "0.94\n" + "0.95\n" + "0.96\n" + "0.97\n" + "0.98\n" + "0.99\n" + "1\n" + "1.01\n" + "1.02\n" + "1.03\n" + "1.04\n" + "1.05\n" + "1.06\n" + "1.07\n" + "1.08\n" + "1.09\n" + "1.1\n" + "1.11\n" + "1.12\n" + "1.13\n" + "1.14\n" + "1.15\n" + "1.16\n" + "1.17\n" + "1.18\n" + "1.19\n" + "1.2\n" + "1.21\n" + "1.22\n" + "1.23\n" + "1.24\n" + "1.25\n" + "1.26\n" + "1.27\n" + "1.28\n" + "1.29\n" + "1.3\n" + "1.31\n" + "1.32\n" + "1.33\n" + "1.34\n" + "1.35\n" + "1.36\n" + "1.37\n" + "1.38\n" + "1.39\n" + "1.4\n" + "1.41\n" + "1.42\n" + "1.43\n" + "1.44\n" + "1.45\n" + "1.46\n" + "1.47\n" + "1.48\n" + "1.49\n" + "1.5\n" + "1.51\n" + "1.52\n" + "1.53\n" + "1.54\n" + "1.55\n" + "1.56\n" + "1.57\n" + "1.58\n" + "1.59\n" + "1.6\n" + "1.61\n" + "1.62\n" + "1.63\n" + "1.64\n" + "1.65\n" + "1.66\n" + "1.67\n" + "1.68\n" + "1.69\n" + "1.7\n" + "1.71\n" + "1.72\n" + "1.73\n" + "1.74\n" + "1.75\n" + "1.76\n" + "1.77\n" + "1.78\n" + "1.79\n" + "1.8\n" + "1.81\n" + "1.82\n" + "1.83\n" + "1.84\n" + "1.85\n" + "1.86\n" + "1.87\n" + "1.88\n" + "1.89\n" + "1.9\n" + "1.91\n" + "1.92\n" + "1.93\n" + "1.94\n" + "1.95\n" + "1.96\n" + "1.97\n" + "1.98\n" + "1.99\n" + "2\n" + "2.01\n" + "2.02\n" + "2.03\n" + "2.04\n" + "2.05\n" + "2.06\n" + "2.07\n" + "2.08\n" + "2.09\n" + "2.1\n" + "2.11\n" + "2.12\n" + "2.13\n" + "2.14\n" + "2.15\n" + "2.16\n" + "2.17\n" + "2.18\n" + "2.19\n" + "2.2\n" + "2.21\n" + "2.22\n" + "2.23\n" + "2.24\n" + "2.25\n" + "2.26\n" + "2.27\n" + "2.28\n" + "2.29\n" + "2.3\n" + "2.31\n" + "2.32\n" + "2.33\n" + "2.34\n" + "2.35\n" + "2.36\n" + "2.37\n" + "2.38\n" + "2.39\n" + "2.4\n" + "2.41\n" + "2.42\n" + "2.43\n" + "2.44\n" + "2.45\n" + "2.46\n" + "2.47\n" + "2.48\n" + "2.49\n" + "2.5\n" + "2.51\n" + "2.52\n" + "2.53\n" + "2.54\n" + "2.55\n" + "2.56\n" + "2.57\n" + "2.58\n" + "2.59\n" + "2.6\n" + "2.61\n" + "2.62\n" + "2.63\n" + "2.64\n" + "2.65\n" + "2.66\n" + "2.67\n" + "2.68\n" + "2.69\n" + "2.7\n" + "2.71\n" + "2.72\n" + "2.73\n" + "2.74\n" + "2.75\n" + "2.76\n" + "2.77\n" + "2.78\n" + "2.79\n" + "2.8\n" + "2.81\n" + "2.82\n" + "2.83\n" + "2.84\n" + "2.85\n" + "2.86\n" + "2.87\n" + "2.88\n" + "2.89\n" + "2.9\n" + "2.91\n" + "2.92\n" + "2.93\n" + "2.94\n" + "2.95\n" + "2.96\n" + "2.97\n" + "2.98\n" + "2.99\n" + "3\n" + "3.01\n" + "3.02\n" + "3.03\n" + "3.04\n" + "3.05\n" + "3.06\n" + "3.07\n" + "3.08\n" + "3.09\n" + "3.1\n" + "3.11\n" + "3.12\n" + "3.13\n" + "3.14\n" + "3.15\n" + "3.16\n" + "3.17\n" + "3.18\n" + "3.19\n" + "3.2\n" + "3.21\n" + "3.22\n" + "3.23\n" + "3.24\n" + "3.25\n" + "3.26\n" + "3.27\n" + "3.28\n" + "3.29\n" + "3.3\n" + "3.31\n" + "3.32\n" + "3.33\n" + "3.34\n" + "3.35\n" + "3.36\n" + "3.37\n" + "3.38\n" + "3.39\n" + "3.4\n" + "3.41\n" + "3.42\n" + "3.43\n" + "3.44\n" + "3.45\n" + "3.46\n" + "3.47\n" + "3.48\n" + "3.49\n" + "3.5\n" + "3.51\n" + "3.52\n" + "3.53\n" + "3.54\n" + "3.55\n" + "3.56\n" + "3.57\n" + "3.58\n" + "3.59\n" + "3.6\n" + "3.61\n" + "3.62\n" + "3.63\n" + "3.64\n" + "3.65\n" + "3.66\n" + "3.67\n" + "3.68\n" + "3.69\n" + "3.7\n" + "3.71\n" + "3.72\n" + "3.73\n" + "3.74\n" + "3.75\n" + "3.76\n" + "3.77\n" + "3.78\n" + "3.79\n" + "3.8\n" + "3.81\n" + "3.82\n" + "3.83\n" + "3.84\n" + "3.85\n" + "3.86\n" + "3.87\n" + "3.88\n" + "3.89\n" + "3.9\n" + "3.91\n" + "3.92\n" + "3.93\n" + "3.94\n" + "3.95\n" + "3.96\n" + "3.97\n" + "3.98\n" + "3.99\n" + "4\n" + "4.01\n" + "4.02\n" + "4.03\n" + "4.04\n" + "4.05\n" + "4.06\n" + "4.07\n" + "4.08\n" + "4.09\n" + "4.1\n" + "4.11\n" + "4.12\n" + "4.13\n" + "4.14\n" + "4.15\n" + "4.16\n" + "4.17\n" + "4.18\n" + "4.19\n" + "4.2\n" + "4.21\n" + "4.22\n" + "4.23\n" + "4.24\n" + "4.25\n" + "4.26\n" + "4.27\n" + "4.28\n" + "4.29\n" + "4.3\n" + "4.31\n" + "4.32\n" + "4.33\n" + "4.34\n" + "4.35\n" + "4.36\n" + "4.37\n" + "4.38\n" + "4.39\n" + "4.4\n" + "4.41\n" + "4.42\n" + "4.43\n" + "4.44\n" + "4.45\n" + "4.46\n" + "4.47\n" + "4.48\n" + "4.49\n" + "4.5\n" + "4.51\n" + "4.52\n" + "4.53\n" + "4.54\n" + "4.55\n" + "4.56\n" + "4.57\n" + "4.58\n" + "4.59\n" + "4.6\n" + "4.61\n" + "4.62\n" + "4.63\n" + "4.64\n" + "4.65\n" + "4.66\n" + "4.67\n" + "4.68\n" + "4.69\n" + "4.7\n" + "4.71\n" + "4.72\n" + "4.73\n" + "4.74\n" + "4.75\n" + "4.76\n" + "4.77\n" + "4.78\n" + "4.79\n" + "4.8\n" + "4.81\n" + "4.82\n" + "4.83\n" + "4.84\n" + "4.85\n" + "4.86\n" + "4.87\n" + "4.88\n" + "4.89\n" + "4.9\n" + "4.91\n" + "4.92\n" + "4.93\n" + "4.94\n" + "4.95\n" + "4.96\n" + "4.97\n" + "4.98\n" + "4.99\n" + "5\n" + "5.01\n" + "5.02\n" + "5.03\n" + "5.04\n" + "5.05\n" + "5.06\n" + "5.07\n" + "5.08\n" + "5.09\n" + "5.1\n" + "5.11\n" + "5.12\n" + "5.13\n" + "5.14\n" + "5.15\n" + "5.16\n" + "5.17\n" + "5.18\n" + "5.19\n" + "5.2\n" + "5.21\n" + "5.22\n" + "5.23\n" + "5.24\n" + "5.25\n" + "5.26\n" + "5.27\n" + "5.28\n" + "5.29\n" + "5.3\n" + "5.31\n" + "5.32\n" + "5.33\n" + "5.34\n" + "5.35\n" + "5.36\n" + "5.37\n" + "5.38\n" + "5.39\n" + "5.4\n" + "5.41\n" + "5.42\n" + "5.43\n" + "5.44\n" + "5.45\n" + "5.46\n" + "5.47\n" + "5.48\n" + "5.49\n" + "5.5\n" + "5.51\n" + "5.52\n" + "5.53\n" + "5.54\n" + "5.55\n" + "5.56\n" + "5.57\n" + "5.58\n" + "5.59\n" + "5.6\n" + "5.61\n" + "5.62\n" + "5.63\n" + "5.64\n" + "5.65\n" + "5.66\n" + "5.67\n" + "5.68\n" + "5.69\n" + "5.7\n" + "5.71\n" + "5.72\n" + "5.73\n" + "5.74\n" + "5.75\n" + "5.76\n" + "5.77\n" + "5.78\n" + "5.79\n" + "5.8\n" + "5.81\n" + "5.82\n" + "5.83\n" + "5.84\n" + "5.85\n" + "5.86\n" + "5.87\n" + "5.88\n" + "5.89\n" + "5.9\n" + "5.91\n" + "5.92\n" + "5.93\n" + "5.94\n" + "5.95\n" + "5.96\n" + "5.97\n" + "5.98\n" + "5.99\n" + "6\n" + "6.01\n" + "6.02\n" + "6.03\n" + "6.04\n" + "6.05\n" + "6.06\n" + "6.07\n" + "6.08\n" + "6.09\n" + "6.1\n" + "6.11\n" + "6.12\n" + "6.13\n" + "6.14\n" + "6.15\n" + "6.16\n" + "6.17\n" + "6.18\n" + "6.19\n" + "6.2\n" + "6.21\n" + "6.22\n" + "6.23\n" + "6.24\n" + "6.25\n" + "6.26\n" + "6.27\n" + "6.28\n" + "6.29\n" + "6.3\n" + "6.31\n" + "6.32\n" + "6.33\n" + "6.34\n" + "6.35\n" + "6.36\n" + "6.37\n" + "6.38\n" + "6.39\n" + "6.4\n" + "6.41\n" + "6.42\n" + "6.43\n" + "6.44\n" + "6.45\n" + "6.46\n" + "6.47\n" + "6.48\n" + "6.49\n" + "6.5\n" + "6.51\n" + "6.52\n" + "6.53\n" + "6.54\n" + "6.55\n" + "6.56\n" + "6.57\n" + "6.58\n" + "6.59\n" + "6.6\n" + "6.61\n" + "6.62\n" + "6.63\n" + "6.64\n" + "6.65\n" + "6.66\n" + "6.67\n" + "6.68\n" + "6.69\n" + "6.7\n" + "6.71\n" + "6.72\n" + "6.73\n" + "6.74\n" + "6.75\n" + "6.76\n" + "6.77\n" + "6.78\n" + "6.79\n" + "6.8\n" + "6.81\n" + "6.82\n" + "6.83\n" + "6.84\n" + "6.85\n" + "6.86\n" + "6.87\n" + "6.88\n" + "6.89\n" + "6.9\n" + "6.91\n" + "6.92\n" + "6.93\n" + "6.94\n" + "6.95\n" + "6.96\n" + "6.97\n" + "6.98\n" + "6.99\n" + "7\n" + "7.01\n" + "7.02\n" + "7.03\n" + "7.04\n" + "7.05\n" + "7.06\n" + "7.07\n" + "7.08\n" + "7.09\n" + "7.1\n" + "7.11\n" + "7.12\n" + "7.13\n" + "7.14\n" + "7.15\n" + "7.16\n" + "7.17\n" + "7.18\n" + "7.19\n" + "7.2\n" + "7.21\n" + "7.22\n" + "7.23\n" + "7.24\n" + "7.25\n" + "7.26\n" + "7.27\n" + "7.28\n" + "7.29\n" + "7.3\n" + "7.31\n" + "7.32\n" + "7.33\n" + "7.34\n" + "7.35\n" + "7.36\n" + "7.37\n" + "7.38\n" + "7.39\n" + "7.4\n" + "7.41\n" + "7.42\n" + "7.43\n" + "7.44\n" + "7.45\n" + "7.46\n" + "7.47\n" + "7.48\n" + "7.49\n" + "7.5\n" + "7.51\n" + "7.52\n" + "7.53\n" + "7.54\n" + "7.55\n" + "7.56\n" + "7.57\n" + "7.58\n" + "7.59\n" + "7.6\n" + "7.61\n" + "7.62\n" + "7.63\n" + "7.64\n" + "7.65\n" + "7.66\n" + "7.67\n" + "7.68\n" + "7.69\n" + "7.7\n" + "7.71\n" + "7.72\n" + "7.73\n" + "7.74\n" + "7.75\n" + "7.76\n" + "7.77\n" + "7.78\n" + "7.79\n" + "7.8\n" + "7.81\n" + "7.82\n" + "7.83\n" + "7.84\n" + "7.85\n" + "7.86\n" + "7.87\n" + "7.88\n" + "7.89\n" + "7.9\n" + "7.91\n" + "7.92\n" + "7.93\n" + "7.94\n" + "7.95\n" + "7.96\n" + "7.97\n" + "7.98\n" + "7.99\n" + "8\n" + "8.01\n" + "8.02\n" + "8.03\n" + "8.04\n" + "8.05\n" + "8.06\n" + "8.07\n" + "8.08\n" + "8.09\n" + "8.1\n" + "8.11\n" + "8.12\n" + "8.13\n" + "8.14\n" + "8.15\n" + "8.16\n" + "8.17\n" + "8.18\n" + "8.19\n" + "8.2\n" + "8.21\n" + "8.22\n" + "8.23\n" + "8.24\n" + "8.25\n" + "8.26\n" + "8.27\n" + "8.28\n" + "8.29\n" + "8.3\n" + "8.31\n" + "8.32\n" + "8.33\n" + "8.34\n" + "8.35\n" + "8.36\n" + "8.37\n" + "8.38\n" + "8.39\n" + "8.4\n" + "8.41\n" + "8.42\n" + "8.43\n" + "8.44\n" + "8.45\n" + "8.46\n" + "8.47\n" + "8.48\n" + "8.49\n" + "8.5\n" + "8.51\n" + "8.52\n" + "8.53\n" + "8.54\n" + "8.55\n" + "8.56\n" + "8.57\n" + "8.58\n" + "8.59\n" + "8.6\n" + "8.61\n" + "8.62\n" + "8.63\n" + "8.64\n" + "8.65\n" + "8.66\n" + "8.67\n" + "8.68\n" + "8.69\n" + "8.7\n" + "8.71\n" + "8.72\n" + "8.73\n" + "8.74\n" + "8.75\n" + "8.76\n" + "8.77\n" + "8.78\n" + "8.79\n" + "8.8\n" + "8.81\n" + "8.82\n" + "8.83\n" + "8.84\n" + "8.85\n" 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"15.68\n" + "15.69\n" + "15.7\n" + "15.71\n" + "15.72\n" + "15.73\n" + "15.74\n" + "15.75\n" + "15.76\n" + "15.77\n" + "15.78\n" + "15.79\n" + "15.8\n" + "15.81\n" + "15.82\n" + "15.83\n" + "15.84\n" + "15.85\n" + "15.86\n" + "15.87\n" + "15.88\n" + "15.89\n" + "15.9\n" + "15.90\n" + "15.91\n" + "15.92\n" + "15.93\n" + "15.94\n" + "15.95\n" + "15.96\n" + "15.97\n" + "15.98\n" + "15.99\n" + "16\n" + "16.01\n" + "16.02\n" + "16.03\n" + "16.04\n" + "16.05\n" + "16.06\n" + "16.07\n" + "16.08\n"; final String subst = "$0 = $1 + 0.$2"; 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