API for retrieving processor data

does anyone here know which java API is used to retrieve data from the processor.....Kinda like system monitoring tool which is able to retrieve the state of processor and display it through graph.......

Besides System and Runtime, I don't think there's much. This would at least give you some memory information. There may be a third party package (maybe check SourceForge), but I don't know of one).
You could potentially make calls to the OS using the exec command in Runtime. You could use the properties in System to figure out the platform and go from there. Take a look at this post for more info on using exec.
http://forum.java.sun.com/thread.jsp?forum=57&thread=125678
Good luck

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