public class Animal3 {

private String name;

private double height;

private int weight;

private String favFood;

private double speed;

private String sound;

// Instead of using an interface in a traditional way

// we use an instance variable that is a subclass

// of the Flys interface.

// Animal doesn't care what flyingType does, it just

// knows the behavior is available to its subclasses

// This is known as Composition : Instead of inheriting

// an ability through inheritance the class is composed

// with Objects with the right ability

// Composition allows you to change the capabilities of

// objects at run time!

public Flys flyingType;

public void setName(String newName){ name = newName; }

public String getName(){ return name; }

public void setHeight(double newHeight){ height = newHeight; }

public double getHeight(){ return height; }

public void setWeight(int newWeight){

if (newWeight > 0){

weight = newWeight;

} else {

System.out.println("Weight must be bigger than 0");

}

}

public double getWeight(){ return weight; }

public void setFavFood(String newFavFood){ favFood = newFavFood; }

public String getFavFood(){ return favFood; }

public void setSpeed(double newSpeed){ speed = newSpeed; }

public double getSpeed(){ return speed; }

public void setSound(String newSound){ sound = newSound; }

public String getSound(){ return sound; }

/* BAD

* You don't want to add methods to the super class.

* You need to separate what is different between subclasses

* and the super class

public void fly(){

System.out.println("I'm flying");

}

*/

// Animal pushes off the responsibility for flying to flyingType

public String tryToFly(){

return flyingType.fly();

}

// If you want to be able to change the flyingType dynamically

// add the following method

public void setFlyingAbility(Flys newFlyType){

flyingType = newFlyType;

}

}