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  How to get currentTime from System?  (Read 1677 times)
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Offline Danskeren

Senior Devvie

Projects: 1


« Posted 2005-01-30 01:53:08 »

I wanna make a game where the speed be a matter of CPU speed so I need to get the currentTime from the SYstem. How do I do that?

Offline Lemon

Senior Newbie

Java games rock!

« Reply #1 - Posted 2005-01-30 05:44:13 »

Use the following System.currentTimeMillis() .
It returns the current time in milliseconds, so a value of 1000 is 1 second.


Offline Karl

Junior Newbie

Java games rock!

« Reply #2 - Posted 2005-01-30 06:15:01 »

Starting with Java 1.5 you could use
long time = System.nanoTime()
to get a 10^-9 seconds resolution which is more accurate than the currentTimeMillis() call.
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Offline Jackal von ÖRF

Junior Devvie

« Reply #3 - Posted 2005-01-31 05:25:43 »

long time = System.nanoTime()

Would somebody know how accurate is that function? Does it use CPU counters as discussed in this thread?

The API says that "This method provides nanosecond precision, but not necessarily nanosecond accuracy. No guarantees are made about how frequently values change." So what is the accuracy of the implementations on Windows and Linux machines?

Offline Valodim

Junior Devvie


« Reply #4 - Posted 2005-02-02 17:54:58 »

it's the most accurate time you can get for comparison purposes Tongue
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