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When do we rethrow exception in catch block with different exception

gudii9
gudii9 asked
on
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Last Modified: 2016-04-15
Hi,

When do we rethrow exception in catch block with different exception?

Say


class ExceptionClass
{
public static void main(String[] args){
try {
System.out.println(9/0);
}
catch(ArithmeticException e) {
throw new NullPointerException();
}
}
}

I wonder whether we can do like above and in what situations we do like above?
please advise
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