Interfaces

Question

You love all animals, and have a dog and a cat as pets.
class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

dog.swim();
cat.swim();
dog.play();
cat.play();

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

//implement the Swimmer and the Player interfaces
class Animal implements Swimmer, Player{

}

abstract class Animal{

}

class Dog extends Animal {
//Override the swim() and the play() methods
@Override
public void swim() {
System.out.println("Dog is swimming");
}
@Override
public void play() {
System.out.println("Dog is playing");
}

}

class Cat extends Animal {
//Override the swim() and the play() methods
@Override
public void swim() {
System.out.println("Cat is swimming");
}
@Override
public void play() {
System.out.println("Cat is playing");
}

}
I can't find where is the problem here. it doesn't give any output.

Answer 1

Migel

Create abstract class Animal, define abstract methods and implement Swimmer and Player interface.

public abstract class Animal implements Swimmer, Player{

public abstract void swim();
public abstract void play();
}

Answer 2

You declare Animal class 2 times. Both are not correct way.. remove those and add this :

abstract class Animal implements Swimmer, Player{

}