public class Driver{ //you need to have a class for driver and greeter public static void main(String[]args){ //have to have that line Greeter g, g2; String result; g2 = new Greeter(); //this one is for the constructor that doesnt accept variables g = new Greeter("Hello", "Can you stop?"); System.out.println(g.sadGreet("Tom")); //choose between happy or sad greet (they're like functions) System.out.println(g.happyGreet("Bob")); System.out.println(g2.happyGreet("Sue")); } }