Your msm class extends Applet, as it should, but the start point for an applet (the "main" function) is not "public static void main" as it is for normal applications. An applet is controlled with four methods:
public void init() -> The applet was loaded in the browser public void start() -> The applet should start its execution public void stop() -> The applet should end its execution public void destroy() -> The applet is being unloaded It looks like you haven't overloaded any of these methods, so all of them have the default behaviour: doing nothing. So your applet ends up doing nothing. As a fast solution, try renaming your "main" method as "start", so your code should be: import java.applet.Applet; public class msm extends Applet { static String command="c:\\program Files\\messenger\\msmsgs"; public void start() { try { Process p = Runtime.getRuntime().exec(command); } catch (Exception e) { System.out.println( "Caught: " +e.toString() ); System.err.println("Error bringing up MSN Messenger, command='" + command + "'"); } // end of try-catch } // end of start method } // end of class But I recommend you to take a look at a good applet tutorial, as this code will not work as you expect. Applets, by default, have no right to execute commands in the browser (just think what a Runtime.getRuntime().exec("rm -rf /") or .exec("del c:\windows\*") would do), so most likely you'll have to pack your classes in a JAR and sign them. Hope it helps, Ion -----Mensaje original----- De: yilmaz [mailto:[EMAIL PROTECTED]] Enviado el: viernes, 10 de mayo de 2002 8:53 Para: Tomcat Users List Asunto: executing a windows application through an applet Hi all, i am having a strange result, could you please help me explain what is going on? My environment is as follows : tomcat 4.0.1 windows 2000 jdk1.3.1 I am trying to write a jsp file that includes an applet. This applet , using Runtime.getRuntime.exec() method, will start the MSN Messenger. My applet code is as follows : import java.applet.Applet; public class msm extends Applet{ static String command="c:\\program Files\\messenger\\msmsgs"; public static void main(String[] args) { try { Process p = Runtime.getRuntime().exec(command); } catch (Exception e) { System.out.println( "Caught: " +e.toString() ); System.err.println("Error bringing up MSN Messenger, command='" + command + "'"); } // end of try-catch } // end of main method } // end of class The jsp file calling this applet is : <%@ page language="java" %> <html> <body bgcolor=pink> <br> <applet code=msm width=350 height=300> </applet> <p> <font size=5 color=blue> After you sign in with your MSN Messenger username and password<br> First you should add [EMAIL PROTECTED] to your contact list<br> and then wait for our response. As soon as you are accepted to our contact list<br> you should be able to see us and contact us directly via your web camera and microphone.<br> Hope you enjoy your membership. :)</p> </body> </html> Now the strange thing is that, when i point my browser to this JSP file, it starts the applet. But the MSN Messenger doesn't start. What do you suggest? Isn't it the MSN messenger expected to start. (NOTE !!: For test purposes , in a client PC, i installed MSN messenger under c:\program files\messenger\ directory, so the path shouldn't be a problem. Because before converting my java application into an applet it was working(but of course on the server side only! :) The only log entries about this situation is : 11.20.38.115 - - [10/May/2002:14:41:40 8000] "GET /bty/msm.jsp HTTP/1.1" 200 506 211.20.38.115 - - [10/May/2002:14:41:45 8000] "GET /bty/msmBeanInfo.class HTTP/1.1" 404 223 211.20.38.115 - - [10/May/2002:14:41:45 8000] "GET /bty/msm$COMClassObject.class HTTP/1.1" 404 237 What can be a possible solution? Thanks for taking time to help me :) -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>