title: Extract german zipcode from line in Java
body: <p>I need to extract the zipcode from file's line.
  each line contains an adress and is formatted in a different way.
  eg.
  "Großen Haag 5c, DE-47559 Kranenburg"
  or
  "Lange Ruthe 7b, 55294 Bodenheim"</p>
  
  <p>the zipcode is always a five digit number and sometimes follows "DE-".
  I use Java.
  Thanks a lot!</p>