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Message:

Object reference

Posted by cannyq on September 26, 2000 at 10:43 PM

> When we make a class reference variable by writing say
> "graphics g" then what actually goes in "g" , prototypes of all the methods + address of class "graphics" or just the prototypes of all the methods found in the "graphics class" .

> Secondly when we make an object reference by writing say
> "A obj1=new A()" then what actually goes in "obj1" , Address of the class copy made in memory + prototypes of all the methods in that copy or just the address of that copy of class .

First of all, if class A is not loaded, the JVM will load try to find, load, link, and initialize it.

After that, obj1 will contain a Class instance pointing the memory block where A was loaded. This will be the place where obj1 goes to get the its declared methods. It would contain a copy of all the local variables and that of its parents. It would also contain a Method Table of direct references to its methods for quick future access.