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Exception- pl help - exam tomorrow  RSS feed

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This is from a jqplus question:
class SomeThrowable extends Throwable { }
class MyThrowable extends SomeThrowable { }

public class TestClass
public static void main(String args[]) throws SomeThrowable
}catch(SomeThrowable e){
throw e;

public static void m1() throws MyThrowable
throw new MyThrowable();
Ans : This prints Done followed by an Exception.
My Question: Here a checked exception is thrown ultimately in catch which is caught by putting a throws in the main method.
So it is as good as the default handler handling this exception.
So , there is no compile error, agreed but then why during runtime the print statement "Done" is followed by a RunTimeError (when the same has been caught already by the throws in the main method).
Am I losing out something on the concepts?
Also when we say 'throw e' it means we are throwing an object of somethrowable. In that case , are we trying to throw a runtimeexception or checkedException.
Pleas e help me. I have my exam tomorrow.
Thanks padmini
Posts: 12198
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You get the exception during runtime because of the "throw e;" statement in the catch block. You can see for yourself if SomeThrowable is a checked exception by removing "throws SomeThrowable" from main() and calling m1() without a try/catch. If it is a checked exception, the code will not compile. If it is an unchecked exception, the code will compile but you'll get a runtime exception.

Consider Paul's rocket mass heater.
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