How big is an object reference in Java and precisely what information does it contain?
<p>As a programmer I think of these as looking like "the java.lang.Object at address 1a234552" or similar for something like the <code>s</code> in</p>

<pre><code>Object s = "hello";
</code></pre>

<p>Is this correct?  Therefore are all references a fixed size?</p>
