Regular Expressions 101

^start of line

Group 1(.+/)??

??repeats the group contents below at most once:

.+any character (except for line terminators), repeated at least once

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([^#\s/]+)?

?repeats the group contents below at most once:

Negated Character Class[^#\s/]+

+matches at least one character outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:#([^\s$]+(?:\([^$]*\))?))?

?repeats the group contents below at most once:

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group 3([^\s$]+(?:\([^$]*\))?)

Negated Character Class[^\s\(]+

+matches at least one character outside the set below:

\sany whitespace character

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:$[^$]*\))?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^\)]*

*matches any number of characters outside the set below:

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Non-Capturing Group(?: +([^\s/]+)\s*)?

?repeats the group contents below at most once:

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 4([^\s/]+)

Negated Character Class[^\s/]+

+matches at least one character outside the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\s*any whitespace character, repeated any number of times

$end of line

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(.+/)??([^#\s/]+)?(?:#([^\s\(]+(?:\([^\)]*\))?))?(?: +([^\s/]+)\s*)?$

String#test
my.module/com.java.lang.String
#test
#method(int m, int n)
String#method(int,String)
String
String label