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inheritance

*/

public class Lesson2 {
  public static void main(String[] args) {
    System.out.println("Hello");
    Animal fisso = new Dog();
          // ok to have Animal variable set to Dog
    fisso.name = "fisso";
    fisso.age = 7;
    fisso.eat();

    // ok as long as fisso has a Dog object
    Dog d = (Dog)fisso;
    System.out.println(d.toy); // error!

    Animal bob = new Cat();
    bob.eat(); // meow

    bob.name = "bob";
    bob.age = 5;
    System.out.println(bob); //
  }
}

class Cat extends Animal { // Animal is the super class
  // Overriding the Animal class's eat function!
  void eat() {
    System.out.println(super.name + " meow");
  }
}

// class Dog inherits all fields and methods of Animal
class Dog extends Animal {
  String toy;

  Dog() {
    toy = "dogbone";
  }
}

class Animal { // extends Object
  String name;
  int age;

  void eat() {
    System.out.println("om nom nom");
  }

  // overrides the default toString() from Object class
  public String toString() {
     return name + ": " + age;
  }
}

// can different classes share fields?