Re: Java Threading Issues

From:

Ben <bescott1@vt.edu>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 30 Aug 2006 22:00:55 -0400

Message-ID:

<ed5fu6$63o$1@solaris.cc.vt.edu>

gibboda wrote:

I am working on trying to use a thread to spawn a class I call to run
in a seperate thread but it has failed. I have a class called
ConnectDir for opening a vpn connection to a server. But what happens
is the Cisco VPN connects but does to give screen control back. I have
to open a seperate session of xterm or alt+F2 for another window. This
does not work very well with automation. I have used vpncommand >
vpn.log 2>&1 & in a java program which works if I am using simple
methods. But I want to create individual classes to be able to read
from text files certain information and be able to integrate with other
classes I develop. Therefore this does not work very well either.
Below is what I have attempted.

The program structure I have is:

public class myconnect
{
    public static void main(String[] args)
    {
        ConnectDir dc = new ConnectDir();

        try
        {
            dc.open();
        }
        catch(expectj.ExpectJException error1)
        {
            System.out.println(error1)
        }

    }
}

What I have tried but it failed to put in seperate thread:

public class myconnect2 extends Thread
{
    public void run()
    {
        ConnectDir dc = new ConnectDir();

        try
        {
            dc.open();
        }
        catch(expectj.ExpectJException error1)
        {
            System.out.println(error1)
        }

    }

    public static void main(String[] args)
    {
        Thread mytest = new myconnect2();
        mytest.start();

    }
}

It may just be that I do not fully understand what threads are suppose
to do. Thank you for your advice and wisdom.

You don't need to extend Thread to use threads...instead try this:

public class myconnect2 implements Runnable
{
    public void run() {
   ConnectDir dc = new ConnectDir();

   try
   {
   dc.open();
   }
   catch(expectj.ExpectJException error1)
   {
   System.out.println(error1)
   }

   }

    public static void main(String[] args)
   {
        myconnect2 threadTest = new myconnect2() /*or however you construct
this class*/

   Thread mytest = new Thread(threadTest);
   mytest.start();

   }

Good luck,
Ben