Exceptions

[srilatha annepu]

is it legal to throw exceptions in a catch block if so should we place that exception also in a try/catch block.please help?

[Michael Carlson]

I just created an exception in a catch block, and it must be caught or declared to be thrown.
Hopes this helps.

[wise owen]

In the catch block, you can re-throw the catched exception again or re-throw a new checked exception that is declared in throws clause of your method header. If an exception handler re-throws an exception (throw in a catch block), same rules apply. Either you need to have a try/catch within the catch or specify the entire method as throwing the exception that is being re-thrown in the catch block. Catch blocks at the same level will not handle the exceptions thrown in a catch block it needs its own handlers.

[Michael Carlson]

You can just throw a new exception in the catch block that's not declared in the method header.

[Douglas Chorpita]

Michael's first statement sounds correct to me. Owen's, too...

Only that exceptions are CAUGHT, not catched. And NEW exceptions are THROWN, not re-thrown.

Michael's third statement seems problematic. You can throw a new exception in a catch-block, but it still would have to be a subclass of the exception already declared in the header. If it were not, it would have to be declared or be thrown inside of a nested try-catch-block. It's simple: Catch or declare.
[ July 09, 2006: Message edited by: Douglas Chorpita ]