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reference problem

Samarth Barthwal
Greenhorn

Joined: Feb 16, 2006
Posts: 23
As stated by Corey McGlone in his article on String Literals.The moment we write a statement like:

String one = "anything";

a reference to string "anything" is created.But in Thinking In Java,Bruce Eckel says that a reference is only generated when we define anything using "new" and only then the variable's reference is created on the heap.

The how is it that here a reference is created for the string and that too on the heap?
Ernest Friedman-Hill
author and iconoclast
Marshal

Joined: Jul 08, 2003
Posts: 24187
    
  34

It sounds like you're confusing the words "reference" and "object". If you replace the word "reference" in your paraphrase of Eckel with the word "object", then it's correct. In the sentence from Corey's article, yes, a reference is "created", although this is really not such an event as an object being created, which is what Bruce is actually concerned with.

An "object" is a real, physical lump of memory, whereas a "reference" is a pointer to such a lump -- a "name" for it. Objects are created on the heap when you use "new"; references don't need creating, and they can live either on the stack or in the heap.


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Tony pony
Greenhorn

Joined: Mar 18, 2006
Posts: 2
Ya like:

int i = 1000;
int j = i;


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Samarth Barthwal
Greenhorn

Joined: Feb 16, 2006
Posts: 23
Thank you for making the concept clear to me.
 
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subject: reference problem