regex101: JavaScript Match Workspace

^start of line

javathe literal text java (case insensitive)

\s+any whitespace character, repeated at least once

Non-Capturing Group(?:\S*-)?

?repeats the group contents below at most once:

\S*any non-whitespace character, repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group version(?<version>\d+(?:\.\d+){0,2}(?:[+_]\d+)?)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:[+_]\d+)?

?repeats the group contents below at most once:

Character Class[+_]

+the literal + (43₁₀ / 53₈ / 2B₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\d+a digit, repeated at least once

Positive Lookahead(?=(?:[-_](?!\d))|$)

1st Alternative(?:[-_](?!\d))

Non-Capturing Group(?:[-_](?!\d))

Character Class[-_]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Negative Lookahead(?!\d)

\da digit

2nd Alternative$

$end of line

Non-Capturing Group(?:[-_.](?:ea|LTS|beta|snapshot|internal|b\d+|\d+[a-z]*))*

*repeats the group contents below any number of times:

Character Class[-_.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:ea|LTS|beta|snapshot|internal|b\d+|\d+[a-z]*)

1st Alternativeea

eathe literal text ea (case insensitive)

2nd AlternativeLTS

LTSthe literal text LTS (case insensitive)

3rd Alternativebeta

betathe literal text beta (case insensitive)

4th Alternativesnapshot

snapshotthe literal text snapshot (case insensitive)

5th Alternativeinternal

internalthe literal text internal (case insensitive)

6th Alternativeb\d+

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case insensitive)

\d+a digit, repeated at least once

7th Alternative\d+[a-z]*

\d+a digit, repeated at least once

Character Class[a-z]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

$end of line

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+){0,2}(?:[+_]\d+)?)(?=(?:[-_](?!\d))|$)(?:[-_.](?:ea|LTS|beta|snapshot|internal|b\d+|\d+[a-z]*))*$

New

java temurin-21.0.0+35.0.LTS

Regular Expressions 101

Regular Expression

Extraction