java puzzlers from oca part 6

Even for new Java developers, constructors are probably no big mystery. In essence, when you create an instance of a class, the constructor of this class is started. In the 6th part of Java Puzzlers series, we will see a case related to constructors.

public class Puzzler {

    public Puzzler(){
        System.out.println("Puzzler no arg constructor");
    }

    public static void main(String[] args){
        Puzzler puzzler = new Puzzler();
    }
}

In the example above Puzzler() constructor will start and "Puzzler no arg constructor" will be printed to the screen. Now lets see a new example.

public class Puzzler {

    public void Puzzler(){
        System.out.println("Puzzler no arg constructor?");
    }

    public static void main(String[] args){
        Puzzler puzzler = new Puzzler();
    }
}

As you can see we added a return value to the constructor of Puzzler and you may expect that "Puzzler no arg constructor?" will get printed but this is not right. When we add a return value to the constuctor, it stops being a constructor. So it won't get started when a new instance is created.