hi!
this doesn't work!
you can start this app twice (it's because there are different jvms with
different classloaders involved), though Main is a singleton:
import javax.swing.*;
import java.awt.*;
public class a {
public static void main(String [] argv) {
Main m = Main.getInstance();
if (m!=null)
m.start();
else
System.out.println("Main already running!");
}
}
final class Main {
final static private Main m = new Main();
static int cnt=0;
private Main() { }
public static Main getInstance() {
if (cnt==0) {
cnt+=1;
return m;
} else
return null;
}
public void start() {
new Application();
}
}
class Application extends JFrame {
public Application() {
super();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(300,300);
setVisible(true);
validate();
}
}
-mw
----- Original Message -----
From: "Ramesh RGVS" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, May 20, 2002 1:13 PM
Subject: Re: batch file
> Hi Sudhir
> Here you can use singleton pattern.Make the class
> which ur trying to invoke from batch file follow a
> singletonpattern.Hope this will solve ur problem
>
> Regards
> Ramesh
>
>
>
> --- Sudhir Kumar <[EMAIL PROTECTED]> wrote:
> > hi,
> > i have a an application which runs when i
> > click on a batch file. But my
> > problem is, once i click on the batch file and the
> > application starts
> > running, the user can come back and click on this
> > batch file again to create
> > another instance of this application. How can i stop
> > this ??
> >
> > Thanks in advance.
> > SKN
> >
> >
>
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