using the Sha160 class??

[tim jones]

hii
I want to get the message digest for a given file using Secure Hash Algorithm.
I found out this class (java.security.hash.Sha160) on googling and i went through the methods that it provides but i couldn't understand them..
Can you please tell me any way of doing this..i.e. given a file,i get the equivalent MD for that..i need this to ensure data integrity once a file is downloaded.

[tim jones]

anyways i found this example :
http://java.sun.com/javase/6/docs//technotes/guides/security/crypto/CryptoSpec.html#MDEx