Pertwee is a library for parsing JSON Feed feeds.
To use it just pass it a feed URL like this:
URL url = new URL("http://example.com/feed/json");
Feed feed = DefaultFeed.fromUrl(url);
And then process the feed at will.
Why did I call it Pertwee, you're probably wondering? I was thinking about possible names around "JSON,", but "JSON" suddenly made me think of "Jon." The most famous person to use that spelling was of course the great Jon Pertwee, and there it was.
Besides, isn't it nice to have a Java library that doesn't begin with the letter "J" for a change?