shameless plug: use db-hafas

[derhuerst]

db-hafas is a client for the HAFAS mobile API of Deutsche Bahn. You can use it to query departures, including their delays. Because it talks to a machine-readable API, it should be a lot more reliable than scraping the website.

In kennell/schiene#1 (comment), we've discussed on how you can use it with a language other than JS: spawn hafas-client-rpc with the stdin/stdout transport and send JSON-RPC from your Java code.