public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle plane = new Airplane("Plane", 123, 45);
    System.out.println(plane.getName());
    System.out.println(plane.describe());
    System.out.println(plane.move(10));

    Vehicle car = new Car("Car", 4);
    System.out.println(car.getName());
    System.out.println(car.describe());
    System.out.println(car.move(10));
  }
}

Plane
I am an airplane with a wingspan of 123.000000 and capacity 45
Landing gear up
Moving
Landing gear down
10.0
Car
I'm a sedan
Moving
10.0

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

public class Main{

  public static void main(String[] args){
    Vehicle car = new Car("Car", 4);
    System.out.println(car.honk_horn());
  }
}

Rules

1. Store any child class within parent class variable
2. Use attributes and methods based on data type of variable, regardless of type stored
3. Overriden methods will use code in child class even when stored as parent data type

public class Main{

  public static void main(String[] args){
    Vehicle[] array = new Vehicle[3];
    array[0] = new Airplane("Plane", 123, 45);
    array[1] = new Car("Car", 4);
    array[2] = new Truck("Truck", 157);

    for(Vehicle v : array){
      System.out.println(v.getName());
      System.out.println(v.describe());
      System.out.println(v.move(10));
    }
  }
}