Runtime.getRuntime().exec hangs and doesn't print the output

Hi,
I have written the following code to execute the command "psexec ipaddress -u userid -p password -l -c execute.exe >> c:/25_showoutpout.txt" and print the output in 25_showoutpout.txt file.
import java.io.*;
public class ExecTest{
     public static void main(String args[]) throws IOException{
     String args1 = "psexec ipaddress -u userid -p password -l -c execute.exe >> c:/25_showoutpout.txt";
     try{
     Process p=Runtime.getRuntime().exec(args1);
int i = p.waitFor();
     System.out.println("Done.with time "+i);
     }catch(Exception e){
          System.out.println("The error is "+e);
But this program hangs and creates a blank 25_showoutpout.txt file.In the process list I can see the process running, but it doesn't redirect the output in the txt file.When i run the command from the command line it runs fine.Please help me.
Thanks in advance

Hi,
I have written the following program to get the output.But still the required output is not coming in the console file.Only the messages that gets printed in the parent console that is coming in the file.But the expected output is to get the messages from the child window which gets executed while the .exe runs.
import java.io.*;
public class RuntimeExecTest{
public static void main(String args[]){
String s = null;
String result= null;
int count =0;
try{
          // read the output from the command
String cmd = "cmd.exe /c D:/installer/PsTools.zip/PsTools/psexec.exe ipaddress -u userid -p password -l -c excute.exe >> C:/RuntimeExec_25.txt";
     Process p = Runtime.getRuntime().exec(cmd);
     InputStream is = p.getInputStream();
     // Get the std in to the process.
     OutputStream os = p.getOutputStream();
     // Get the std err from the process.
     InputStream es = p.getErrorStream();
     // Create readers for those streams.
     BufferedReader reader = new BufferedReader(new InputStreamReader(is));
     BufferedReader errReader = new BufferedReader(new InputStreamReader(es));
     String line;               
     // Read STDOUT into a buffer.
     // If no STDOUT check STDERR.
     while((line = errReader.readLine()) != null){
          // Do something with data here if you wish.
     System.out.println( line );
     while((line = reader.readLine()) != null){
          // Do something with data here if you wish.
     System.out.println( line );
     System.exit(0);
catch( Exception ex )
ex.printStackTrace();
}

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