1. Assume you wish to create a mutator for a zip code instance variable within an Address data definition class. Instead of throwing IllegalArgumentException, you wish to create your own exception, InvalidZipCodeException which will be thrown when an invalid zip code has been passed to the method. Using course terminology, describe (in detail) how you could create your own exception, InvalidZipCodeException. No Java code is needed, but you should be very specific in describing what would be included within the Java code, using course terminology.

2. Assume you have created an inheritance hierarchy with classes of Employee, Engineer, and Architect. Employee is an abstract class. Each class has a hello() method. Based on the implementation code provided below, could each of the following code blocks be added to the end of the main method? Why or why not? Explain your answer using course terminology.

1) JOptionPane.showMessageDialog(null, getHelloMessage(emp1));

2) JOptionPane.showMessageDialog(null, getHelloMessage(eng1));

3) JOptionPane.showMessageDialog(null, getHelloMessage(arc1));

// Implementation Class

import javax.swing.JOptionPane;

public class Question {

public static void main(String[] args) {

Employee emp1 = new Employee();

Engineer eng1 = new Engineer();

Employee arc1 = new Architect();

//Code would be added here

}

public static String getHelloMessage(Employee e) {

return e.hello();

}

}