🚀 go-pugleaf

On Tue, 20 Jun 2000 10:59:33 -0700, Jon C. Creyts wrote:

> public boolean showDialog(String transfer) {
>     ok = false;          //ok is a boolean changed to true if OK button
> is pressed
>     show();
>     if (ok) {
>         transfer = transfer.concat(", ModifiedInDialog2");
>     }
>     return ok;
> }

This code will not work, since the concat() method does not modify the 
string that is passed to it.  Neither does any other method modify a 
string, since strings are immutable.  Instead, it creates a new string 
that contains the argument appended to it.

Your code then modifies the argument variable "transfer", which is a 
reference to a string.  This changes the "transfer" variable to refer to 
the new string, but it does not change the variable that was passed to 
the showDialog() method.

-- 
John P. McGrath
<JPMcGrath@fast.net>
<jpm@nscs.fast.net>