An Exceptional Child

A large application with several possible problem situations might define several subclasses of Exception.

public class TooYoungException extends Exception
{

  TooYoungException ( int age )
  {
    super( "Age is: " + age  );
  }

}

Remember that super() in the constructor invokes the constructor of the super class, Exception. Now a method can throw a TooYoungException and a catch{} block can catch one.