class TestCommand { public static void main(String[] args) { DvdName jayAndBob = new DvdName("Jay and Silent Bob Strike Back"); DvdName spongeBob = new DvdName("Sponge Bob Squarepants - " + "Nautical Nonsense and Sponge Buddies"); System.out.println("as first instantiated"); System.out.println(jayAndBob.toString()); System.out.println(spongeBob.toString()); CommandAbstract bobStarsOn = new DvdCommandNameStarsOn(jayAndBob); CommandAbstract bobStarsOff = new DvdCommandNameStarsOff(jayAndBob); CommandAbstract spongeStarsOn = new DvdCommandNameStarsOn(spongeBob); CommandAbstract spongeStarsOff = new DvdCommandNameStarsOff(spongeBob); bobStarsOn.execute(); spongeStarsOn.execute(); System.out.println(" "); System.out.println("stars on"); System.out.println(jayAndBob.toString()); System.out.println(spongeBob.toString()); spongeStarsOff.execute(); System.out.println(" "); System.out.println("sponge stars off"); System.out.println(jayAndBob.toString()); System.out.println(spongeBob.toString()); } }

The class TestCommand is the main class to run the code.
The main method calls the toString method of JayAndBob and SpongeBob objects created.
The execute method of bobStarsOn and spongeStarsOn is called.
The execute method of bobStarsOff is called.