Regex only matches specific whitespaces between delimiters

Question

I need a regex which will match whitespace chars under some condition. Let's say I have this string:

String s = "{ <class body declarations> }";

I want to apply Java replaceAll method only on the whitespaces between the two delimiters < and >, to obtain this string:

"{ <classbodydeclarations> }";

Is there a regex to do that?

Answer 1

the following regex works, however it can be tricked by an unexpected <. see https://regex101.com/r/nBm213/2 for a demonstration.

(?:(?<=<).*?)( )(?:.*?(?=>))

feel free to improve on this answer.