How can I set system date from java code?

Hi. I need to set the system date from my application. It must works on Windows7 so the "cmd /C date" must be executed with Administrator privileges.
I tried do it that
Process p = rt.exec("runas /user:" + env.get("COMPUTERNAME") + "\\Administrator \"cmd /C date " + dateYYYYMMDD + "\"");
Then process ask me for password for administrator but it terminates befor i send it. exitCode() returns 1.
Have you some idea how can I do it?
Regards for you.

At the very least, you need to read this and follow the advice it gives. That may or may not solve your problem, but it's a bare minimum.
http://www.javaworld.com/jw-12-2000/jw-1229-traps.html

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