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

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 = "(?ms)LEVEL:\\s+(?<LEVEL>.*)PID\\s+:\\s(?<PID>\\d+)\\s+TID\\s:\\s+(?<TID>\\d+)\\s+PROC\\s+:\\s+(?<PROC>\\w+)\\s+\\d+\\s+INSTANCE:\\s+(?<INSTANCE>\\w+)\\s+NODE\\s+:\\s+(?<NODE>\\d+)\\s+DB\\s+:\\s+(?<DB>\\w+)\\s+APPHDL\\s+:\\s+(?<APPHDL>[^ ]+)\\s+APPID:\\s+(?<APPID>[^ ]+)UOWID\\s+:\\s+(?<UOWID>\\d+)\\s+ACTID:\\s+(?<ACTID>\\d+)\\s+AUTHID\\s+:\\s+\\w+\\s+HOSTNAME:\\s+(?<HOSTNAME>[^ ]+)\\s+EDUID\\s+:\\s+(?<EDUID>\\d+)\\s+EDUNAME:\\s+(?<EDUNAME>.*)\\s+FUNCTION:\\s+(?<FUNCTION>\\w+)"; final String string = "2020-01-27-15.00.10.349880-480 I930031A600 LEVEL: Error\n" + "PID : 30868490 TID : 180042 PROC : db2sysc 0\n" + "INSTANCE: db2prd2 NODE : 000 DB : PRODDW_2\n" + "APPHDL : 0-55088 APPID: 170.2.78.74.45949.200127223832\n" + "UOWID : 101 ACTID: 1\n" + "AUTHID : DWFLDREP HOSTNAME: db2udb04.us164.corpintra.net\n" + "EDUID : 180042 EDUNAME: db2agnts (PRODDW_2) 0\n" + "FUNCTION: DB2 UDB, runtime interpreter, sqlrisrt, probe:3312\n" + "DATA #2 : Hexdump, 4 bytes\n" + "0x0A000000A83FD4C4 : 800F 0003 ...."; 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