Re: Free Java objects in RPG

On Fri, 20 Jun 2003, Beppe Costagliola wrote:
>
> >  string = createString(myString);
> >  string = trimString(string);
>
>  we actually have 2 java objects to free and suggests how to correct the
>  code.

The reason for this is that they used the object reference "string"
twice in the code above, without freeing the first one.

Think about it...  createString() creates a new string, and trimString()
also creates a new string.  Obviously, you need to free two strings,
right?   Just freeing it once isn't going to clean everything up.

>
> >  for i = 1 to 100;
> >    string = createString(myString);
> >    newObject = someMethod(string);
> >    . . . .
> >  endfor;
>
>  At the end of the loop:
>
> > FreeLocalRef(String);
> > FreeLocalRef(newObject);
>

As long as the "FreeLocalRef" calls are INSIDE the loop, this should be
fine.   Two objects are created, and you have two FreeLocalRefs... that's
what you want.   When running that in a loop, it creates 200 objects, and
frees 200 objects...   that's what you need.

Whereas, if you had put the "FreeLocalRef" calls outside of the loop,
it would still create 200 objects, but only free 2 of them.

Make sense?