Not declaring the Exception

[M Rama]

This question is from Whizlabs exam

 
 

public class Test2 {
 
void f() throws MyException3 {
throw new MyException3();
}
public static void main(String[] args) throws MyException3 {
MyException3 e1 = null;
Test2 test = new Test2();
try {
test.f();
} catch (MyException3 e) {
e1 = e;
System.out.println("Catch");
} finally {
System.out.println("finally");
throw e1;
}
System.out.println("End");
 
}
}
 

The answer is "Does not compile" and the reason given is, System.out.println("End"); is not reachable. Now

This question does not have the declaration:

class MyException3 extends Exception {}

If the System.out.println("End"); were not there in the above code, can I say, it won't compile 'cos the MyException3 has not be declared, or would I have to imagine that the exception has been declared somewhere?

I mean, could they test us on something like this?

[Rahul Bhosale]

the code wont compile as MyException3 does not belong to the exception hierarchy.

[Parameswaran Thangavel]

hi Ragul
i didn't get the point of Exception Hierarchy in connection with Throwing the method.can u explain me more.

[Kedar Dravid]

To start with, I think the code you have posted is incomplete. If it is not incomplete, then Rahuls' answer is spot-on.
I guess u forgot to add the following to the code snippet:
class MyException3 extends Exception
{
}
If this is the case, then the explanation is as follows:

The finally block throws an exception which is not caught. The finally block will always be executed. So, the statement System.out.println("End"); is always unreachable, since the exception is not caught and execution terminates abruptly.

Comment out the throw statement in the finally block and it won't throw a compile-time error.
[ April 09, 2005: Message edited by: Kedar Dravid ]

[ankur rathi]

If the System.out.println("End"); were not there in the above code, can I say, it won't compile 'cos the MyException3 has not be declared, or would I have to imagine that the exception has been declared somewhere?

I mean, could they test us on something like this?

In the exam , you will get clear-cut questions . You don't need to assume anything untill they don't tell ...

[Parameswaran Thangavel]

hi
can i know what the role Exception Hierarchy is playing in throwing an Exception

[M Rama]

Thanks Rathi Ji. That was the answer I was hoping to hear.