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Is that something you come across frequently enough to hate the Java classpath? AFAIK, $PATH might be tripped up by that as well, as `:` is part of the syntax for delimiting.

Just because I was curious, I tried searching for all directories containing ":" and besides /sys and /run, I got three hits. One because of "https://", one because of "localhost:8080" (both mirrors made from wget) and one where it actually seems to be on purpose.

It seems, to me at least, that having colon in path names is unpopular enough for this to not be a real problem.

Edit: desktop I tried the command (`# find / -name ':' -type d`) on has been running daily since beginning of 2018 (2196 packages installed atm), with daily pacman updates, so should have enough data for a average workstation.

Colon is an invalid character on Windows systems. I've used it when making log files where they have an intermediate suffix with an ISO 8601 timestamp but indeed I don't see a reason to have it in a path with class or jar files.

How does this work out on Windows?

Windows uses ';' for path delimiter.

Why is that an issue?

Can't you just use an escape character?