On Sun, Jul 6, 2008 at 10:13 PM, Henning Thielemann
In Modula-3 you have to add the exceptions that can be raised to a PROCEDURE header. Java has adopted this mechanism.
Many people argue that this was a mistake [1, 2, 3, 4]. For one it requires that you rewrap exceptions at every abstraction boundary or expose your implementation details in the API. For example, imagine that you decide to use an SQL database as a data store and declare that your functions throw an SQLException. If you later change your mind and want to use a plain file for storage you need to change your function's type and thereby break clients that use your API. If you don't want this to happen you have to wrap all exception in MyException and throw that. 1. http://radio.weblogs.com/0122027/stories/2003/04/01/JavasCheckedExceptionsWe... 2. http://www.mindview.net/Etc/Discussions/CheckedExceptions 3. http://www.ibm.com/developerworks/java/library/j-jtp05254.html 4. http://www.oreillynet.com/onjava/blog/2004/09/avoiding_checked_exceptions.ht... Cheers, Johan