Hi programmer's,
i have made javaCode, program run perfectly but created file not having
any data.i need a code which run perfectly and also save output of
command in textfile.Please provide exect matiral,plz dnt send the link.
Let me describe in brife:
I need to play command " df  -h  > text.txt"
below program create a file but never add data in text.txt
i havent modifyed it for linux(red hat 9).
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// GoodWinRedirect.java
import java.util.*;
import java.io.*;

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 GoodWinRedirect
{
   public static void main(String args[])
   {
       if (args.length < 1)
       {
           System.out.println("USAGE java GoodWinRedirect
<outputfile>");
           System.exit(1);
       }

       try
       {
           FileOutputStream fos = new FileOutputStream(args[0]);
           Runtime rt = Runtime.getRuntime();
           Process proc = rt.exec("java jecho 'Hello World'");
           // any error message?
           StreamGobbler errorGobbler = new
               StreamGobbler(proc.getErrorStream(), "ERROR");

           // any output?
           StreamGobbler outputGobbler = new
               StreamGobbler(proc.getInputStream(), "OUTPUT", fos);

           // kick them off
           errorGobbler.start();
           outputGobbler.start();

           // any error???
           int exitVal = proc.waitFor();
           System.out.println("ExitValue: " + exitVal);
           fos.flush();
           fos.close();
       } catch (Throwable t)
         {
           t.printStackTrace();
         }
   }
}