Get system information

im fairly new at using java so my question is...
how can i get the system information using java?
the system information i want to get are the following:
number of processors
processor speed
memory
hard disk space
i would want to be able to get those in any system.
Thanks for your help.

Language again, Like I care.
How did I break the rules. Quote:
Is there complete
document of all classes and methods in java in a book
format not electronic?Posting a question like that in an unrelated thread that isn't even yours is annoying.

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Hi,
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import java.util.*;
public class SystemProperties{
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