Method Overriding and NullPointerException rules.

Scenario:

Superclass method throws NullPointerException (Checked/Unchecked?). Parent method: void process() throws NullPointerException { ... }

Question:

Can Child override it with void process() throws RuntimeException { ... }?

Answer: Yes.

• NullPointerException is a RuntimeException (Unchecked).
• If the superclass method throws an unchecked exception, the child can throw any unchecked exception (including RuntimeException itself, which is a superclass of NPE).
• Rules for broader exceptions only apply to Checked Exceptions.