Exception Handling - Absolute Java - page 548

Display 9.7 Demonstration of How to Use BadNumberException (part 2 of 2)

Sample Dialogue 1

Enter one of the numbers 42 and 24:
42
Thank you for entering 42
End of program.

Sample Dialogue 2

Enter one of the numbers 42 and 24:
44
44 is not what I asked for.
End of program.

Self-Test Exercises

12. Defi ne an exception class called PowerFailureException . The class should
have a constructor with no parameters. If an exception is thrown with this zero-
argument constructor, getMessage should return "Power Failure!" The
class should also have a constructor with a single parameter of type String .
If an exception is thrown with this constructor, then getMessage returns the
value that was used as an argument to the constructor.
13. Defi ne an exception class called TooMuchStuffException . The class should
have a constructor with no parameters. If an exception is thrown with this zero-
argument constructor, getMessage should return "Too much stuff!" The
class should also have a constructor with a single parameter of type String .
If an exception is thrown with this constructor, then getMessage returns the
value that was used as an argument to the constructor.
14. Suppose the exception class ExerciseException is defi ned as follows:
public class ExerciseException extends Exception
{

public ExerciseException()
{

super ("Exercise Exception thrown!");
System.out.println("Exception thrown.");
}

public ExerciseException(String message)
{

super (message);
System.out.println(
"ExerciseException invoked with an argument.");
}
}