38 Use of abstract class in java

abstract class Animal {
  abstract void makeSound();

  public void eat() {
    System.out.println("I can eat.");
  }
}

class Dog extends Animal {
  public void makeSound() {
    System.out.println("Bark bark");
  }
}

class Main {
    public static void main(String[] args) {
        Dog d1 = new Dog();
        // creating obj of dog class
        d1.makeSound();
        d1.eat();
  }
}
// Output
Bark bark
I can eat.