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Which JVM to use?

 
Philip Shanks
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I have a class that I put together, loosly based on some Microsoft sample code:

And then I made sure that the com.ms.util.SystemVersionManager class could be found in com\ms\util\ in the same directory as my Java source file (I extracted it from a zip archive that is part of the MS Virtual Machine installation for Win2000).
It compiled just fine, and then, just to make sure I knew what JVM I am calling when I run "java" from the command line, I did this:

And then I ran my code. Now I was expecting errors galore, as it would be highly unusual for the BEA JVM to mimic very closely the MS VM. But what I actually got was wholly unexpected. The code ran in the native MS VM!
Output:

Some other relevant info:

No CLASSPATH is set.

So, what the heck just happened?
PCS
[ November 20, 2002: Message edited by: Philip Shanks ]
 
Cindy Glass
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Are you sure that no classpath is set?
Open a DOS window and at the prompt type
>set
then look for the classpath parameter.
(or you can use the "echo %classpath%" command)
If the code that you executed only uses classes up to the level that MS has loaded it would work correctly.
 
Philip Shanks
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I just confirmed... no %CLASSPATH% environment variable. Somehow, by accessing the com.ms.util.SystemVersionManager, the code winds up executing in the MS VM.
 
Anonymous
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I just happened to open the mentionned class in Decafe (Java decompiler). The values are actually hard-coded into the class
Hence, I'm pretty convinced you've still be running the same VM as before
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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