throw is used to explicitly raise an exception. throws is used in a method signature to declare that the method may throw a checked exception, delegating responsibility for handling it to the caller.

throw — Explicitly Raising an Exception
Full content is available with a subscription.
Get full access to all courses on the platform for one year with a single payment.
Unlike other platforms that charge per course, here you get everything for one price, and after one year of use there will be no automatic charge for the following year.