regex101: Java Match Workspace

Pro

^start of line

Negative Lookahead(?!.*(?:\d+(?:\.\d+)?[^\dx]*x[^\dx]*){2}\d)

.*any character (except for line terminators), repeated any number of times

Non-Capturing Group(?:\d+(?:\.\d+)?[^\dx]*x[^\dx]*){2}

{2}repeats the group contents below exactly 2 times:

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Negated Character Class[^\dx]*

*matches any number of characters outside the set below:

\da digit

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Negated Character Class[^\dx]*

*matches any number of characters outside the set below:

\da digit

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

\da digit

.*any character (except for line terminators), repeated any number of times

Negative Lookbehind(?<![\d.])

Character Class[\d.]

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 1(\d+(?:\.\d+)?)

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Negated Character Class[^\dx]*

*matches any number of characters outside the set below:

\da digit

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Negated Character Class[^\dx]*

*matches any number of characters outside the set below:

\da digit

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Negative Lookbehind(?<![\d.])

Character Class[\d.]

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d+(?:\.\d+)?)

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

^(?!.*(?:\d+(?:\.\d+)?[^\dx]*x[^\dx]*){2}\d).*(?<![\d.])(\d+(?:\.\d+)?)[^\dx]*x[^\dx]*(?<![\d.])(\d+(?:\.\d+)?)

S (26 in x 30 in)
20 x 40
Standard Size (10.51 x 40.37)
Extra x here is OK 31.6 x more chars other than letter after w here is OK 81.7 more here is OK
Numbers 78 and 81.1 before 22.5 x 31 is OK
20 x 40 x 80
M (26 in x 30 in x 50.6 in)