time function

Currently i am doing an assignment. the title is parallel sorting algorithm. i want to include the time into program so i can know how much time the parallel sorting is use. how can i include it in java? thank you.
castle_ckmAsked:
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TimYatesCommented:
long then = System.currentTimeMillis() ;

... do processing ...

long now = System.currentTimeMillis() ;
System.out.println( "Took " + ( now - then ) + "ms" ) ;
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CleanupPingCommented:
castle_ckm:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1 
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TimYatesCommented:
Mmmmm...Grade C...

Thanks... :-P
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