I needed a quick way to enter unicode in Java sourcecode-strings, and hacked some random html bit I found on the internet.

http://www.dfki.uni-kl.de/~sauermann/2006/10/charmap.html

press the magic "Java Escapes" button and you get some escaped äs and ös.

Note: it wrecks unicodes that are below \uff, you have to add a \u00ff then.