How do I use constructors in inheritance in Java?

How do I use constructors in inheritance in Java?

In Java, constructors in inheritance are used to initialize the state of an object. When a subclass is created, it can call the constructor of its superclass using the super() keyword.

Can you give me an example of that?

Sure! Here's a simple example:

class Animal {
    Animal() {
        System.out.println("Animal created");
    }
}

class Dog extends Animal {
    Dog() {
        super(); // Calls the constructor of Animal
        System.out.println("Dog created");
    }
}

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

This will output:

Animal created
Dog created

What if I want to pass parameters to the superclass constructor?

You can pass parameters to the superclass constructor by including them in the super() call. For example:

class Animal {
    Animal(String name) {
        System.out.println(name + " created");
    }
}

class Dog extends Animal {
    Dog(String name) {
        super(name); // Passes the name to the Animal constructor
        System.out.println("Dog created");
    }
}

public class Main {
    public static void main(String[] args) {
        Dog dog = new Dog("Buddy");
    }
}

This will output:

Buddy created
Dog created