Hands-On Design Patterns with Java

Driver class

The RoasterDriver class contains our program's main() method and drives the application. The functionality starts by creating a RoasterDirector instance and two Builder instances. Next, the build sequence is called once each for a personal roaster and a commercial roaster:

public class RoasterDriver {    public static void main(String[] args) {        RoasterDirector roasterDirector = new RoasterDirector();        Builder personalRoasterBuilder = new PersonalRoaster();        Builder commercialRoasterBuilder = new CommercialRoaster();        // Build a Personal Roaster        roasterDirector.buildRoaster(personalRoasterBuilder);        Roaster unit1 = personalRoasterBuilder.getRoaster();        unit1.display();        // Build a Commercial Roaster        roasterDirector.buildRoaster(commercialRoasterBuilder); ...