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  recursion and static methods  (Read 3392 times)
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Offline Gorgorath

Junior Devvie

Java games rock!

« Posted 2004-06-11 15:39:04 »

Hey, fellow developers:)

a short one:)
is it safe to recursively call a static method?

cheers Paul
Offline Herkules

Senior Devvie

Friendly fire isn't friendly!

« Reply #1 - Posted 2004-06-11 16:07:06 »

its save as long as you can prevent a stack overflow....

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Offline Gorgorath

Junior Devvie

Java games rock!

« Reply #2 - Posted 2004-06-11 16:16:01 »

:-/ well, i've just managed to get a stack overflow in my recursively calles BSPTree builder, so i should make the methods non static?!


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Offline cfmdobbie

Senior Devvie

Medals: 1

Who, me?

« Reply #3 - Posted 2004-06-11 16:24:28 »

No.  You're got a stack overflow because you're not breaking out of your recursive function chain - static has nothing to do with this.

Go back through the code and confirm that your logic is correct.

Hellomynameis Charlie Dobbie.
Offline King_of_Men

Senior Newbie

EUII player

« Reply #4 - Posted 2004-06-11 21:38:27 »

You might be getting overflows even with correct logic, if your problem is big enough. Recursion is very easy to program, but fantastically inefficient.

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Offline swpalmer

JGO Coder

Exp: 12 years

Where's the Kaboom?

« Reply #5 - Posted 2004-06-11 22:57:46 »

Actually I vaguely remember Jeff mentioning that Java's recursion isn't all that inefficient.  The implication was that it is more efficient that recursion in a typical C program.

Offline Jacko

Junior Devvie

« Reply #6 - Posted 2004-06-12 07:50:49 »

It might be more efficient, but you have still only got a finite amount of stack space. (Tail recursion would be a good optimisation for the JVM to do here.)

Making it non static is not going to help any. You will want to use iteration instead.

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