Comments on: Java’s String.trim has a strange idea of whitespace

By: Tim McCormack

Tim McCormack — Fri, 26 Aug 2011 17:47:34 +0000

I’m finding [\p{javaWhitespace}\p{Zs}] to be a pretty good range for trimming whitespace. As a utility class: https://gist.github.com/1173941

By: priyavenkat

priyavenkat — Wed, 29 Dec 2010 22:50:59 +0000

And adding to this was yet another post here

By: priyavenkat

priyavenkat — Tue, 28 Dec 2010 23:01:25 +0000

Hi that was a fantastic post!!Was wondering why trim() was not trimming a deliberately introduced unicode whitespace character and found the answer here! Hats off!

By: g

Wed, 20 Oct 2010 08:27:43 +0000

huh???

I juz now it today, omg …!!
why… why why this happened on trim of java sdk.

By: closingbraces

closingbraces — Thu, 03 Jun 2010 11:13:49 +0000

Hi Johann,

If it’s fine for your needs, fine, no problem. It’s just that if one is dealing with strings that can include control codes or non-ASCII characters, it doesn’t do quite what one might expect and isn’t entirely consistent with Java’s other “whitespace” methods.

For some people and situations that will matter (e.g. for “internationalized” strings), for others it won’t. As usual, you either need to know precisely what you want and how to achieve it, or you can just assume String.trim is at roughly what you want and accept whatever it happens to do.