regex101: PCRE (Legacy) Match Workspace

Pro

Group argument(?<argument>\w+(?:\.\w+)*(?:\<(?<arglist>\g<argument>(?:,\s\g<argument>)*)\>)?)

\w+any word character, repeated at least once

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

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+any word character, repeated at least once

Non-Capturing Group(?:\<(?<arglist>\g<argument>(?:,\s\g<argument>)*)\>)?

?repeats the group contents below at most once:

\<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group arglist(?<arglist>\g<argument>(?:,\s\g<argument>)*)

\g<argument>calls group argument as a subroutine

Non-Capturing Group(?:,\s\g<argument>)*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\sany whitespace character

\g<argument>calls group argument as a subroutine

\>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

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

25 tokens

Regular Expression

(?<argument>\w+(?:\.\w+)*(?:\<(?<arglist>\g<argument>(?:,\s\g<argument>)*)\>)?)

New

java.util.Map<java.util.Map<java.util.List<String>, java.lang.Object>, Object>
java.util.Map<java.util.List<String>, java.lang.Object>, Object
java.util.List<String>, java.lang.Object
java.util.List<String>
java.lang.Object

Substitution

java.util.Map<java.util.Map<java.util.List<String>, java.lang.Object>, Object>
java.util.Map<java.util.List<String>, java.lang.Object>, Object
java.util.List<String>, java.lang.Object
java.util.List<String>
java.lang.Object