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

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 = "[\\r\\n]+\\[\\d{4}-\\d{2}-\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}\\.\\d+-\\d{2}:\\d{2}\\|info]\\*[^\\r\\n]+([\\r\\n]+)\\[\\d{4}-\\d{2}-\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}\\.\\d+-\\d{2}:\\d{2}\\|info\\]Line"; final String string = "[2019-12-18 07:00:01.070924-07:00|info]Line 3: :begin\n" + "[2019-12-18 07:00:01.070924-07:00|info]Line 4: \n" + "[2019-12-18 07:00:01.070924-07:00|info]Line 5: WORKINGDIR \"C:\\Download\\Server1\"\n" + "[2019-12-18 07:00:01.070924-07:00|info]*Working directory: C:\\Download\\Server1\\\n" + "[2019-12-18 07:00:01.070924-07:00|info]Line 6: \n" + "[2019-12-18 07:00:01.070924-07:00|info]Line 7: FTPLOGON \"Server1\" /timeout=60\n" + "[2019-12-18 07:00:01.070924-07:00|info]*Logging on to <server1> as SFTP (SSH File Transfer Protocol)\n" + "[2019-12-18 07:00:01.070924-07:00|info]*Logon in progress...\n" + "[2019-12-18 07:00:03.055523-07:00|info]*Logon successful.\n" + "[2019-12-18 07:00:03.055523-07:00|info]Line 8: FTPCD \"Extracts\"\n" + "[2019-12-18 07:00:03.164909-07:00|info]*Current FTP site directory: /Extracts/\n" + "[2019-12-18 07:00:03.164909-07:00|info]Line 9: IFERROR= $ERROR_SUCCESS GOTO Operation1\n" + "[2019-12-18 07:00:03.164909-07:00|info]Line 21: :Operation1\n" + "[2019-12-18 07:00:03.164909-07:00|info]Line 22: FTPGETFILE \"*na_alert_subs*\" /newest\n" + "[2019-12-18 07:00:03.164909-07:00|info]*Hint: FTPGETFILE /newest always returns the newest file\n" + "[2019-12-18 07:00:03.430561-07:00|info]Line 22: *%sitefile has been set to: na_alert_subs_20191217.txt\n" + "[2019-12-18 07:00:03.446223-07:00|info]Line 23: RCVFILE %sitefile /delete\n" + "[2019-12-18 07:00:03.446223-07:00|info]*Receiving to \"C:\\Download\\Server1\\na_alert_subs_20191217.txt\"\n" + "[2019-12-18 07:00:12.947244-07:00|info]*Complete, received 1394788 bytes in 9 seconds (1513.44K cps)\n" + "[2019-12-18 07:00:13.103506-07:00|info]*File deleted on FTP site.\n" + "[2019-12-18 07:00:13.103506-07:00|info]*Download complete, 1 file received.\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