Redirection with exec

Question

Hai friends,
i want to execute a shell command in java.. so i executed the below program..
i am getting the output when i gave ls but it is not working when i am giving ls >abc.txt
this is the program:
import java.util.*;
import java.io.*;
// class StreamGobbler omitted for brevity
class StreamGobbler extends Thread
InputStream is;
String type;
OutputStream os;
StreamGobbler(InputStream is, String type)
this(is, type, null);
StreamGobbler(InputStream is, String type, OutputStream redirect)
this.is = is;
this.type = type;
this.os = redirect;
public void run()
try
PrintWriter pw = null;
if (os != null)
pw = new PrintWriter(os);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
while ( (line = br.readLine()) != null)
if (pw != null)
pw.println(line);
System.out.println(type + line);
if (pw != null)
pw.flush();
} catch (IOException ioe)
ioe.printStackTrace();
public class TestExec
public static void main(String args[])
try
String cmd ="ls -l " ;
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(cmd);
// any error message?
StreamGobbler errorGobbler = new
StreamGobbler(proc.getErrorStream(), "ERR");
// any output?
StreamGobbler outputGobbler = new
StreamGobbler(proc.getInputStream(), "");
// kick them off
errorGobbler.start();
outputGobbler.start();
// any error???
int exitVal = proc.waitFor();
System.out.println("ExitValue: " + exitVal);
} catch (Throwable t)
t.printStackTrace();
Now,i want to redirect the output i get from ls command to some file...
is it possible??
Help me please.

Answer 1

ps.sorry for the double reply; something got stuck I guess.Brain?Nah, that silly forum software complained about "please enter subject title"
where there definitely was one (I didn't touch it) then I pressed back
and fiddled a bit, and voila: a double reply was the result ;-)
kind regards,
Jos (my last brain activity was somewhere in the 1970s and it hurt,
so I switched it off ;-)