super() in Java

Question

Is super() used to call the parent constructor? Please explain super().

Answer 1

Source article: Java: Calling super()

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Yes. super(...) will invoke the constructor of the super-class.

Illustration:

Stand alone example:

class Animal {
    public Animal(String arg) {
        System.out.println("Constructing an animal: " + arg);
    }
}

class Dog extends Animal {
    public Dog() {
        super("From Dog constructor");
        System.out.println("Constructing a dog.");
    }
}

public class Test {
    public static void main(String[] a) {
        new Dog();
    }
}

Prints:

Constructing an animal: From Dog constructor
Constructing a dog.