How to calculate a MD5 checksum with Java
MessageDigest.getInstance("MD5")
How to Check E-Mail Server Connection
Small Java snippet to send a test E-Mail
How to get diff/patch from GitHub
Cool GitHUB API feature
How to pretty print JSON with gson
This one is easy: new GsonBuilder().setPrettyPrinting()
How to add your own logger in Virgo
Sometimes you need another debug level...