loading classes into a running JVM

[Tim Panton - Westhawk Ltd]

Yes just add it to the classpath.

- with limitations- your class-b
would have to implement an already
defined Interface- say Loadable
in your class-a you have code
which says 
String classb =getNewClassName();
Loadable b = (Loadable) Class.classForName(classb).newInstance();
b.whatever();

Or you need to use reflection.

"Hanes, Jeff             x66258" <JHanes at bis.adp.com> wrote:
__________
>the recent flap about JVMs and classloaders leads me to the following
>question:
>
>is it possible to add a class to a running JVM from *outside* the JVM?
>
>for example,
>suppose i have two terminal windows open on the same machine (could be
>either WinNT or UNIX)
>
>in window 1, i type:
>
>	java class_a
>
>so i have a JVM process running and doing whatever class_a does.
>
>leaving this running, i then go to window 2 ... is there anything i can type
>to add class_b to
>the *same* instance of the JVM process i started in window 1?  if i
>understand things correctly,
>then class_b could invoke methods in class_a and vice versa.
>
>if i could get this work, it would save me a lot of headaches with file i/o.
>
>thanks in advance,
>Jeff Hanes
>
>
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