no output

Question

class soloLearn11 {
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
abstract class Animal {-----------------> I have a problem on this ,,it cause error

protected abstract void swim();

protected abstract void play();
}

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

@Override
protected void play() {
System.out.println("Dog is playing");
}
}

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

@Override
protected void play() {
System.out.println("Cat is playing");
}
}

Answer 1

The methods shld be made public when you override them..
Like,

@Override
public void swim() {
.......
}

@Override
public void play() {
....
}

Answer 2

interface methods are public, so do all implemented and abstract methods public and no protected

Answer 3

thank you