The try, catch, and finally blocks

When an exception is thrown inside a try block, it redirects control flow to the first catch clause. If there is no catch block that can capture the exception (but then finally block has to be in place), the exception propagates all the way up and out of the method. If there is more than one catch clause, the compiler forces you to arrange them so that the child exception is listed before the parent exception. Let's look at the following example:

void someMethod(String s){
    try {
       method(s);
    } catch (NullPointerException ex){
       //do something
    } catch (Exception ex){
       //do something else
    }
}

In the preceding example, a catch block with NullPointerException is placed before the block with Exception because NullPointerException extends RuntimeException, which, in turn, extends Exception. We could even implement this...