// The interface is implemented by many other

// subclasses that allow for many types of flying

// without effecting Animal, or Flys.

// Classes that implement new Flys interface

// subclasses can allow other classes to use

// that code eliminating code duplication

// I'm decoupling : encapsulating the concept that varies

public interface Flys {

String fly();

}

// Class used if the Animal can fly

class ItFlys implements Flys{

public String fly() {

return "Flying High";

}

}

//Class used if the Animal can't fly

class CantFly implements Flys{

public String fly() {

return "I can't fly";

}

}