Question

Can we extend checked/unchecked exceptions in java. If yes can we have any samples. Please provide samples if any available.

Answer 1

Yes

//checked exception extended    
class MyCheckedException extends Exception{
}

//unchecked exception extended
class MyUncheckedException extends RuntimeException{
}

Unchecked exceptions are those exceptions which extend RuntimeException (or any subclasses thereof), while checked ones extend any Exception class (Exception, IOException that is NOT a subclass of RuntimeException.