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Timing In Java

Started by jhwc1138 Sep 27, 2002 at 11:26 AM 1 reply 400+ views

Original Post

Sep 27, 2002 at 11:26 AM

Hi there all!! I have a programming assignment that calls for me to calculate the time it takes for a number of various sorting methods to run, and then compare the result. I know in c/c++ you can include the time.h file and use getTime()to do this. What is the timing class in Java? What package is it in? Thanks

Enigma

188

Enigma

Sep 27, 2002 at 11:34 AM

java.lang.System.currentTimeMillis();

Or use the java.util.Date class.

Enigma

Big Sassy

Sep 27, 2002 at 3:01 PM

Keep in mind that currentTimeMillis() accuracy varies depending on the system. Don''t quote me on this, but on a Unix box it is accurate to 1ms. On an NT machine it is accurate to 10ms. And on an 9x machine it is accurate to 50-60ms. If you are testing the speed of each function, it probably won''t be accurate enough (unless you run the test lots of times). That''s the one major problem I have with java. I wish they''d have a high precision timer. But I''m just rambling now so I''ll stop.

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