The note file is from Hexatron (http://www.hexatron.com), the person who translated the original Rogue code from C to Java.
I've updated the code to run as a Java application instead of an Applet, to output a Score file (and display this at the end of the game), and to use Serialization allow saving / loading games.
The code compiles and runs (I wouldn't release it if it didn't), but has quite a bit of ugliness. The original code is VERY C accented Java. The entire code base should ideally be refactored at some point. This would be a big job.
There's some ugliness to what I've added as well. The code to setup the AWT is pretty hairy - in Rogue.java lines 236 to 278 and could be cleaned up quite a bit. I had issues with the explored maze being marked as unseen when a game is loaded which was an issue that I fixed with the very hacky solution in the init_seen() method in man (lines 1625-1633). The identified items was an issue with Id.java (they were stored as static variables, which aren't saved / loaded with serialization - I added a synchronization approach that saves these values when serialization is occuring, then re-assigns them during deserialization). This seems OK to me, but a better approach might be to create a non-static singleton to represent these values. The score file is outputing and updating (with the top 10 previous characters). The output isn't formatted exactly the same as the original Rogue and this is probably worth getting right at some point.