How can I calculate the difference between two dates [duplicate]

Answer 1

You use the classes Date and Duration:

http://download.oracle.com/javase/1.5.0/docs/api/java/util/Date.html

http://download.oracle.com/javase/1.5.0/docs/api/javax/xml/datatype/Duration.html

You create Date-objects, then use Duration's methods addTo() and subtract()