public class GreeterTest {
  public static void main(String[] args) {
    // Part 1.  Construct and initialize (instantiate) a
    // Greeter object named g1.
    Greeter g1 = new Greeter();
    
    // Part 2.  Ask g1 to sayHello and store the message in a
    // String variable named message.
    String message = g1.sayHello();
    
    // Part 3.  Print message.
    System.out.println("message is " + message);
    
    // Part 4.  Ask g1 to sayGoodbye and store the message in
    // the variable message.  (What will happen to the first 
    // hello message?)
    message = g1.sayGoodbye();
    
    // Part 5.  Print message.
    System.out.println("message is " + message);
    
    // Activity 5 stuff
    Greeter g2 = new Greeter("Cathy");
    message = g2.sayHello();
    System.out.println("message is " + message);
    message = g2.sayGoodbye();
    System.out.println("message is " + message);
    
    Greeter g3 = new Greeter("Moon");
    message = g3.sayHello();
    System.out.println("message is " + message);
    message = g3.sayGoodbye();
    System.out.println("message is " + message);
  }
}