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Difference between Runtime.gc() and System.gc()

vitthal wable

Joined: Sep 09, 2006
Posts: 16
Can You please tell me the difference between Runtime.gc() and System.gc()
Ta Ri Ki Sun
Ranch Hand

Joined: Mar 26, 2002
Posts: 442
No difference at all.

From javadoc :
The call <code>System.gc()</code> is effectively equivalent to the call: Runtime.getRuntime().gc()
Peter Chase
Ranch Hand

Joined: Oct 30, 2001
Posts: 1970
The difference is that you shouldn't call either of them ;-)

Betty Rubble? Well, I would go with Betty... but I'd be thinking of Wilma.
Marcus Hathaway
Ranch Hand

Joined: Jun 07, 2005
Posts: 89
Hi Peter, why shouldn't you call them?

ps....thats not a loaded question, i'm interested to learn more
Robert Hill
Ranch Hand

Joined: Feb 24, 2006
Posts: 94
For starters calling .gc() does not guarantee that the gc will run at that time. It makes a "best effort" attempt and cleaning unneeded objects.

The second reason is that the gc is a resource hog. Adding the call in your code adds overhead and isn't even necessary. The GC does its job well.

The amount of times that a developer will actually need to mess with the gc or call it directly are rare.
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subject: Difference between Runtime.gc() and System.gc()
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