User Story
As an animal lover, I want to be able to simulate the sounds of different animals, so that I can learn more about the sounds they make and have fun exploring their characteristics.
This code provides a simple example of how to use virtual and override keywords in Apex to simulate the sounds of different animals. The code defines a base class called Animal with a makeSound method that prints a generic animal sound. It also creates two subclasses of Animal called Dog and Cat, each of which overrides the makeSound method with its own implementation of the sound the animal makes.
Using this code, the user can create instances of Animal, Dog, and Cat classes, and call the makeSound method on them to print out the corresponding sound that each animal makes. By exploring the different sounds that animals make, the user can learn more about their characteristics and behaviors, and have fun simulating and experiencing their sounds.
Code
public virtual class Animal {
public void makeSound() {
System.debug('Generic animal sound');
}
}
public class Dog extends Animal {
public override void makeSound() {
System.debug('Bark');
}
}
public class Cat extends Animal {
public override void makeSound() {
System.debug('Meow');
}
}
Animal myAnimal = new Animal();
myAnimal.makeSound(); // Output: "Generic animal sound"
Animal myDog = new Dog();
myDog.makeSound(); // Output: "Bark"
Animal myCat = new Cat();
myCat.makeSound(); // Output: "Meow"
EXPLANATION
In this example, we have a base class called Animal with a makeSound method that prints a generic animal sound. The Animal class is marked as virtual, which means that its methods can be overridden by subclasses.
We then create two subclasses of Animal called Dog and Cat. Each subclass overrides the makeSound method with its own implementation of the sound the animal makes.
Finally, we create instances of each class and call the makeSound method on them. When we call makeSound on the Animal instance, it prints the generic animal sound. But when we call makeSound on the Dog instance, it prints "Bark", and when we call it on the Cat instance, it prints "Meow". This is because the Dog and Cat classes have overridden the makeSound method from the Animal class.
Video
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