There are some details that are not as important to the concepts (classes)

1. There are some details that are not as important to the concepts (classes) ITK 179

2. Object Shape {abstract} interface Rectangle Circle RectanglePrism Cylinder implements ITK 179

3. Animal publicabstractclass Animal { privateintweight; public Animal(int lb) { // constructor; weight = lb; } publicabstract String is_a(); // What animal is this; publicabstract String eats(); // the food it eats; publicabstract String sounds(); // the sound it makes; publicint Weight() { // return the weight; returnweight; } } ITK 275

4. WildAnimal publicabstractclass WildAnimal extends Animal { private String fHabit; private String NativePlace=null; public WildAnimal(String feedingHabit, int weight) { super(weight); this.fHabit = feedingHabit; } public String feedingHabit() { returnfHabit;} publicvoid lives_in(String NativePlace) { this.NativePlace = NativePlace; } public String lives_in() { returnNativePlace;} } ITK 275

5. DomesticAnimal publicabstractclass DomesticAnimal extends Animal{ private String purpose, my_name=null; public DomesticAnimal(String purpose, int weight) { super(weight); this.purpose = purpose; } public String name() { returnmy_name; } publicvoid name(String name) { my_name = name; } public String is_for() { returnpurpose; } } ITK 275

6. Elephant publicclass Elephant extends WildAnimal{ public Elephant(int weight) { super("herbivorous", weight); } public String is_a() { return"elephant"; } public String eats() { return"banana"; } public String sounds() { return"enheeen"; } } ITK 275

7. BigCat publicabstractclass BigCat extends WildAnimal{ public BigCat(int weight) { super("carnivorous", weight); } } Tiger publicclass Tiger extends BigCat{ public Tiger(int weight) { super(weight); } public String is_a() { return"tiger"; } public String sounds() { return"Grrr! Grrr! "; } public String eats() { return"meat"; } } ITK 275

8. Lion publicclass Lion extends BigCat{ public Lion(int weight) { super(weight); } public String is_a() { return"lion"; } public String sounds() { return"Roarn! Roand!"; } public String eats() { return"meat"; } } ITK 275

9. Cow publicclass Cow extends DomesticAnimal { public Cow (int weight) { super("milk",weight); } public String is_a() { return"cow"; } public String sounds() { return"Mooo! Mooo!"; } public String eats() { return"grass"; } } ITK 275

10. Pet publicclass Dog extends DomesticAnimal implements Pet { private String my_address; public Dog (String name, int weight) { super("pleasure",weight); this.name(name); } public String is_a() { return"dog"; } public String sounds() { return"Woof! Woof!"; } public String likes() { return"bone"; } public String eats() { return likes(); } public String address() { returnmy_address; } public String address(String add) { returnmy_address = add; } } publicinterface Pet { public String address(); public String likes(); } Dog ITK 275

11. Cat publicclass Cat extends DomesticAnimal implements Pet { private String my_address; public Cat (String name, int weight) { super("pleasure",weight); this.name(name); } public String is_a() { return"cat"; } public String sounds() { return"Meow! Meow!"; } public String likes() { return"fish"; } public String eats() { return likes(); } public String address() { returnmy_address; } public String address(String add) { returnmy_address = add;} } ITK 275

12. publicstaticvoid aboutThisDomesticAnimal(DomesticAnimal x) { System.out.println(" Variable x is a " + x.is_a() +"."); System.out.println(x.name() + " is a " + x.Weight()+" ponds "+ x.is_a() + " for " + x.is_for() + "." ); } publicstaticvoid aboutThisWildAnimal(WildAnimal x) { System.out.println(" Variable x is a " + x.is_a() +"."); System.out.println("This " + x.is_a() + " weights " + x.Weight() + " pounds."); System.out.println("The " + x.is_a() + " is a " + x.feedingHabit()+" animal from " + x.lives_in()+"."); } ITK 275

13. Animal animal[]; Dog lucky; Cat mimi; Cow daisy; Tiger T; Lion L; Elephant E; animal = new Animal[6]; animal[0] = lucky = new Dog("Lucky", 25); lucky.address("Bloomington"); animal[1] = mimi = new Cat("Mimi", 15); mimi.address("Normal"); animal[2] = daisy = new Cow(500); daisy.name("Daisy"); animal[3] = T = new Tiger(300); T.lives_in("Asia"); animal[4] = L = new Lion(400); L.lives_in("Africa"); animal[5] = E = new Elephant(1200); E.lives_in("Africa"); ITK 275

14. for (int i=0; i<animal.length;i++) { System.out.print("\n"+i+": "); if (animal[i] instanceof DomesticAnimal) { aboutThisDomesticAnimal((DomesticAnimal) animal[i]); } if (animal[i] instanceof WildAnimal) { aboutThisWildAnimal((WildAnimal) animal[i]); } } ITK 275

15. Bird publicclass Cardinal extendsWildAnimalimplements Bird{ public Cardinal(int weight) { super("herbivorous", weight); } public String is_a() { return"cardinal"; } public String eats() { return"worms"; } public String sounds() { return"Gee! Gee! Gee!"; } publicString color() { return"red"; } } publicinterface Bird { String color(); } Cardinal ITK 275

16. publicclass Canary extendsDomesticAnimalimplements Pet, Bird { private String my_address; public Canary (String name, int weight) { super("pleasure",weight); this.name(name); } public String color() { return"yellow"; } public String is_a() { return"canary"; } public String sounds() { return"Chu! Chu! Chu!"; } public String likes() { return"seeds"; } public String eats() { return likes(); } public String address() { returnmy_address; } public String address(String add) { returnmy_address = add; } } Canary ITK 275