/** * A DomesticAnimal "is-a" Animal -- this means that a DomesticAnimal has the behavior we described in Animal! */ /** * extends means we must write code for all of the methods * we defined in Animal. If we don't, we won't be able to create * a DomesticAnimal! */ public class DomesticAnimal extends Animal{ /** * What additional state might a DomesticAnimal have? * In addition to the name, color, hungerLevel, and favoriteFood, * a DomesticAnimal has an owner and an address! */ private String owner; private String address; /** * super refers to the constructor in the "parent" class -- * this would be the constructor we made in Animal! * That constructor needs a color, name, and favoriteFood to * work properly, so we use super to send it the information * it needs to finish making a DomesticAnimal! */ public DomesticAnimal(String color, String name, String favoriteFood, String owner, String address){ super(color, name, favoriteFood); this.owner = owner; this.address = address; } /** * A DomesticAnimal already has all of the behavior defined in Animal. * Below is the additional behavior that a DomesticAnimal would have, but * wouldn't make sense for EVERY animal to have! */ public void greetOwner(){ System.out.println(getName() + " says hello to " + owner + "!"); } public String getOwner(){ return owner; } /** * What if a DomesticAnimal moves or changes owners? We want to be able * to change this state. To do so, we use "setters!" This is a setter for * the owner. */ public void setOwner(String newOwner){ owner = newOwner; } public void goHome(){ System.out.println(getName() + " is headed home to " + address + "!"); } public String getAddress(){ return address; } public void setAddress(String newAddress){ address = newAddress; } /** * Because DomesticAnimal extends Animal, we must define the move() method if * we want to be able to create a DomesticAnimal. * extends means that a DomesticAnimal "is-a" Animal! */ public void move(){ System.out.println(getName() + " is walking!"); } }