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  System.arraycopy  (Read 5162 times)
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Offline Absolution

Senior Newbie




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« Posted 2002-12-06 12:15:42 »

Is System.arraycopy safe to use in your main loop (i.e. as it applies to GC)?
Offline Herkules

Senior Devvie




Friendly fire isn't friendly!


« Reply #1 - Posted 2002-12-06 14:05:09 »

Does not get the question right.

System.arrayCopy() copies one array into another. This has nothing to do with GC.


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Offline leknor

Junior Devvie




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« Reply #2 - Posted 2002-12-07 16:35:18 »

Herkules: He's asking if System.arraycopy() creates garbage.

Absolution: My understanding is that arraycopy is intended to be used in performance critical code. So assume yes unless someone can proove me wrong.
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Offline Herkules

Senior Devvie




Friendly fire isn't friendly!


« Reply #3 - Posted 2002-12-08 08:45:19 »

Quote
Herkules: He's asking if System.arraycopy() creates garbage.


Sure, got that, but why should copying an array produce garbage??

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Offline princec

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« Reply #4 - Posted 2002-12-08 11:05:16 »

Well, there's a lot of unexpected places where Java creates a few naughty objects. But this isn't one of them Smiley

Cas Smiley

Offline Absolution

Senior Newbie




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« Reply #5 - Posted 2002-12-08 13:15:52 »

Thanks, that's helpful.  Does anybody know exactly how this method works?  Is it just doing a copy of the reference values in the src objects to those in the dest objects?  
Offline leknor

Junior Devvie




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« Reply #6 - Posted 2002-12-08 16:17:13 »

It does a shallow copy.
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