Animal lovers, java

Question

I am not sure what I have to write inside the abstract class.

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
abstract class Animal{
public void swim ();
public void play();
}

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

}
public void play (){
System.out.println("Dog is playing");
}
}
}

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

Answer 1

Zotta
Add abstract for abstract methods..
abstract class Animal{
abstract public void swim();
abstract public void play();
}
And also you are missing ; in line51.

edit :
no use of interface. you can remove.
if you want use interface too, add implementations:

abstract class Animal implements Swimmer, Players {
abstract public void swim();
//public void swim(){ } also works but better to make abstract here
abstract public void play();
}

Answer 2

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class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

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

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

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

}

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

public void play() {
System.out.println("Dog is playing");
}

}

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

public void play() {
System.out.println("Cat is playing");
}

}

Answer 3

//100%
class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

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

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

//implement the Swimmer and the Player interfaces

abstract class Animal implements Swimmer, Player {

}

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

}

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

Answer 4

better is
abstract class Animal implements Swimmer, Player {

and delete last parentheses } in Cat and Dog class

Answer 5

// Solution
class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

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

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

//implement the Swimmer and the Player interfaces
abstract class Animal{
abstract public void swim();
abstract public void play();
}

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

public void play() {
System.out.println("Dog is playing");
}

}

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

public void play() {
System.out.println("Cat is playing");
}

}

Answer 6

class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

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

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

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

}

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

public void play() {
System.out.println("Dog is playing");
}

}

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

public void play() {
System.out.println("Cat is playing");
}

}

// this is working

Answer 7

class Main {
public static void main(String[] args) {
Animal dog = new Dog();
Animal cat = new Cat();

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

}
}

interface Swimmer {
void swim();
}

interface Player {
void play();
}

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

class Dog extends Animal{
public void swim(){
System.out.println("Dog is swimming");
}
public void play(){
System.out.println("Dog is playing");

}
}

class Cat extends Animal {
public void swim(){
System.out.println("Cat is swimming");
}
public void play() {
System.out.println("Cat is playing");
}
}