java question

[Rajesh Inakota]

How to make class to be created only on hash not on stack?

--
Regards,
Rajesh.I

[Sridivakar Inakonda]

In Java, memory for every Object gets allocated from heap not from
stack. Only reference to that object can exists on stack.

-Divakar.

[Rajesh Inakota]

Agreed divakar.

What if I want to do this with C++?

--
Regards,
Rajesh.I

[Shyam Prakash Velupula]

Make the ctor & dtor private. Define a public static method that construct the object on heap (just like factory method). Of course provide a public static method to destruct the same.

Thanks
Shyam Velupula

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You are limited only by your imagination

[Rajesh Inakota]

what is the output of below code? what will it print?

class SimpleObj {

    int i;

}

public class PassObject {

    public static void passObject(SimpleObj from, SimpleObj to) {

        to = from;

    }

    public static void main(String[] args) {

        SimpleObj obj = new SimpleObj();

        SimpleObj  from = obj;

        SimpleObj to = null;

        

        passObject(from, to);

        System.out.println(to.i);

    }

}

--
Regards,
Rajesh.I

[Sridivakar Inakonda]

I guess, this should through nullpointer exception, because of

        System.out.println(to.i);

is accessing null object, passObject() is not changing value on this "to"  reference, it is changing value of reference on stack.

-Divakar.

[Rajesh Inakota]

yes.

--
Regards,
Rajesh.I

[ashok Mudithanapalli]

post more CPP questions.........:)