hi friend,

1. get() returns the real object fetched directly from the database whereas, load() returns proxy object which is a temporary fake object, which may or may not exist in database.
2. load() method should be used if the existence of object is sure whereas, get() method should by used if the existence of object is not sure.
3. load() method throws an exception if unique id is not found whereas, get() method returns null if unique id is not found

For more detail please go through the following link may, this will be helpful for you.

http://www.roseindia.net/hibernate/hibernate4/hibernate_get.shtml