// should you make a constructor $private$?
// Not usually...try the following:

/* 2nd opinion by Niranjan:

I saw a comment in the private_constructor.java file that said
that usually you don't make constructors private and it seemed
to give the impression that private constructors lead to errors. I was
worried by this because I have often seen private constructors being
used in industrial java code. They are useful to create special objects
of a class for use inside the class where the user should have no
knowledge of such special objects. They are also sometimes used for the
very purpose that you have shown in the example: to prevent the
use of a certain form of creating the object. Actually this is usually
done in C++ to prevent the compiler from creating a default constructor
that the user can use (i.e forcing the object to be always be created
using non-default constructors.)

*/

class Test {
    public int k = 1;
    private Test() {}
}

public class private_constructor {
    public static void main(String[] args) {
	System.out.println(new Test().k);
    }
}

/* Output: 
private_constructor.java:8: No constructor matching Test() found in class Test.
        System.out.println(new Test().k);
                           ^
1 error
*/