memory allocation problem

[krishnaraja Puranika]

hi...consider this simple program
public class Test
{
public static void main(String[] args)
{
System.out.println("Hello All");
}
}
the question is ..i know that memory is allocated to a perticular object whenever it is instantiated and this case we wont....where the memory is allocated for this perticular program ? pls clarify ...
thanx in advance.....

[Vijayakumar Arya]

Hi Krishnaraja,
In fact, there is a step prior to instantiation of objects and that is called class loading. The JVM uses the class loader to load the class into the memory, it loads the class variables and the methods of the class.
When you instantiate an object, VM will allocate only the memory for the instance variables.
The memory for the methods are not allocated for each instance of the class. At a higher level we can say that the bytecode loaded into the memory is reused. The memory management, semaphores, threads, local variables are all managed internally by the JVM.
Hope this answers your question

[Cindy Glass]

Well I think that it goes like this.
The Classfile for class Test gets loaded first. Where it is placed is not specified by the JLS Specs but probably on a reserved section of the heap. The methods (all one of them ) get loaded to the Method area.
Then there is a String created for "Hello All" which is placed in the String Pool.
Because you are invoking the main method of this class a thread is started dedicated to it. When that thread is over (pretty darn soon in this case) everything is released by the JVM, the class is unloaded and the process ends.

[Cindy Glass]

Oh, I see that Vijay got here first .
In that case - yeah - what HE said .

[krishnaraja Puranika]

thanx a lot...........vijay...bye