public class GreeterTest {
    
    public static void main(String[] args) {

	Greeter worldGreeter = new Greeter();
	String s = worldGreeter.sayHello();
	System.out.println(s);

	Greeter2 bobGreeter = new Greeter2("Bob");
	Greeter2 daveGreeter = new Greeter2("Dave");
	System.out.println(bobGreeter.sayHello());
	System.out.println(daveGreeter.sayHello());

	// daveGreeter.greeting = "Bob"; // would not compile

	daveGreeter = bobGreeter;
	System.out.println(daveGreeter.sayHello());

    }
}