Free Java objects in RPG

I'm a little confused about freeing java objects created within RPG.

Rpg ref v5r2 says that if we code:

>  string = createString(myString);
>  string = trimString(string);
 
 we actually have 2 java objects to free and suggests how to correct the
 code.

However suppose we have coded something like this:
 
>  for i = 1 to 100;
>    string = createString(myString);
>    newObject = someMethod(string);
>    . . . .
>  endfor;
 
 At the end of the loop:
 
> FreeLocalRef(String);
> FreeLocalRef(newObject);
 
should be enough ?
 
Or does we have 200 objects to free ?

Thanks.
Beppe.