throw

■ You cannot have a Subclass method throw a more general checked exception than the individual parent method which it is overriding throws.

■ You cannot have a Subclass method throw checked exceptions from a different hierarchy than what the parent method throws.

■ After a checked exception, an overriding subclass method can catch and do the following:

(1) rethrow the same exception,

(2) throw a subclass of the exception, or

(3) throw nothing.

i.e they can throw NONE, SAME, or LOWER

■ The syntax of rethrowing or rethrowing is as follows:

For throwing: throw new ArithmeticException( “A problem” ); or

For rethrowing: catch (ArithmeticException e) { some code; throw e;}