Re: Creating java strings in RPG

[James Perkins <jrperkinsjr@xxxxxxxxx>]

You definitely don't want to create so many Java strings like that in RPG.
Each time you create a new string or concatenate a string you are creating a
new object. Garbage collection does not happen in RPG programs
automatically. You have to run some native JNI stuff to let the JVM know you
are done with the objects.

I would personally just use a varying field in RPG then create the Java
string at the end when you need it. If that is not an option I would look at
StringBuilder if you are at Java 5 or higher or StringBuffer if you are at a
Java release before Java 5.

--
James R. Perkins
http://twitter.com/the_jamezp


On Thu, Jan 7, 2010 at 06:22, ssc1478 <ssc1478@xxxxxxx> wrote:

> I have an RPG pgm where I'm creating a lot of strings and concatenating
> them.
>
> I'm looking to see if there is a more efficient way to do it.  Currently
> I'm
> creating a string, then trimming the string, creating and trimming a second
> string, then concatenating:
>
> string1 = newString(RPGvar1);
> string1 = trimString(string1);
> string2 = newString(RPGvar2);
> string2 = trimString(string2);
> string3 = concat(string1:string2);
>
> I think that's 5 String() objects that gets created.  Is there a way to
> create a string with out needing to trim it?
>
> Thanks!
> Phil
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