Exception Handling

[Raef Kandeel]

I have been studying from a study guide and I was faced with the following question:-

public class ExceptionTest {
class TestException extends Exception {}
public void runTest () throws TestException {}
public void test ()/* Point X*/{
runTest();

}
}

At point X on line 4, which code can be added to make the code compile?
A.throws Exception,
B.catch (Exception e)
C.throws RunTimeException.
D.catch (TestException e)
E.No code is necessary

Answer: B
I tested the code and I think the correct answer is A.


Am I right. Thanks for your help.

[Jesper de Jong]

Answer B is certainly wrong. Out of the choices, A is correct.

[Gitesh Ramchandani]

Originally posted by Raef Kandeel:
I have been studying from a study guide and I was faced with the following question:-

public class ExceptionTest {
class TestException extends Exception {}
public void runTest () throws TestException {}
public void test ()/* Point X*/{
runTest();

}
}

At point X on line 4, which code can be added to make the code compile?
A.throws Exception,
B.catch (Exception e)
C.throws RunTimeException.
D.catch (TestException e)
E.No code is necessary

Answer: B
I tested the code and I think the correct answer is A.


Am I right. Thanks for your help.

Yes that study guide contains many answers wrong. Very obvious reason, a catch cannot exist on its own.

[Remko Strating]

Answer A is correct, because method runTest throws a TestException which extends exception which is a checked exception and the rule is "handle or declare"

For to handle you need to have a catch in a try..catch block in which you need more than one line in the example
So the next option is to declare which is option A.

By throwing exception you can also throw a subclass of exception which is TestException.