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hello friends,

this is my attempt to execute an external cmd file through java and get the output printed to a text file while the program is running (not after the program has ended), since I need to do some real time manipulation for depending on the program output.

class RunnableThread implements Runnable {

	Thread runner;
	public RunnableThread() {
	}
	public RunnableThread(String threadName) {
		runner = new Thread(this, threadName); // (1) Create a new thread.
		System.out.println(runner.getName());
		runner.start(); // (2) Start the thread.
                
	}
	public void run() {

            try{
              
               
               File file=new File("C:/Documents and Settings/Administrator/Desktop/ant.txt");

		//Display info about this particular thread
		System.out.println(Thread.currentThread());
                

               
                Runtime rt = Runtime.getRuntime();
                Process p1 = rt.exec(" rundll32 SHELL32.DLL,ShellExec_RunDLL " +"E:/HarvestCruise/build_current/source/_ant_compile.cmd");
                

                try{
                int p= p1.waitFor();
                }catch(InterruptedException f){}

               InputStream is=p1.getInputStream();
                int c;


                try {
			DataOutputStream out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
			
                        System.out.println("I'm before the loop executes and the read value of c is "+is.read());

			while((c = is.read()) != -1) {
                            System.out.println("Im inisde the while loop and "+c);
				out.writeByte(c);
			}
			is.close();
			out.close();
		}
		catch(IOException e) {
			System.err.println("Error Writing/Reading Streams.");
		}
                           
               
	

        try{
System.out.println("This is the exit value "+p1.exitValue());
                }catch(IllegalThreadStateException s){
                
                }

                }catch(IOException k){}
    }
}

and then I invoke this thread by,

public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        RunnableThread thread3 = new RunnableThread("thread3");

        System.out.println(Thread.currentThread());



    }

}

but the problem is, isRead() always returns -1, hence always an empty ant.txt file is created where the shell output is supposed to be. any help is appreciated.
thanks a lot!

Edited by miraj0072004: incomplete post

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