regex101: Java Match Workspace

Positive Lookbehind(?<=https?://)

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://the literal text ://

Non-Capturing Group(?:\w+\.)+

+repeats the group contents below at least once:

\w+any word character, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group domain(?<domain>\w+\.\w+)

\w+any word character, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+any word character, repeated at least once

Character Class[/\s$]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\sany whitespace character

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

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

27 tokens

Regular Expression

(?<=https?://)(?:\w+\.)+(?<domain>\w+\.\w+)[/\s$]

New

https://www.subdomain.example.com/folder/folder


valid.domains.below
schools.k12  
newTLD.clothing   text thtat should not be matched 
good.photography
x.a-b.com
x-y.a-b.net
x-y.a-b-c.co.uk
x.0ac.com
schools.k12
newTLD.clothing
good.photography
0-1-2.3-4.co
a-----b.com

hello he.llo-o.com/okayokay/

https://www.11737.se/hello/

http://www.11377.se/hello/

www.11773.se/hello/


invalid-.domains for fun
-domain.com
domain--.com
-domain-.-.com
domain.000
.domain.net
domain.net.
sub.-domain.com
sub.domain-.com
sub-.domain.com
-sub.domain.com