Java EE (Java Enterprise Edition) General Discussion

Hi!

I am trying to execute following command using a Java program.
grep username | who | wc -l

I have written following code.

String command = "/bin/bash -c grep username | who | wc -l";
Process p = Runtime.getRuntime().exec(command);
BufferedReader stdInput = new BufferedReader(new
InputStreamReader(p1.getInputStream()));

BufferedReader stdError = new BufferedReader(new
InputStreamReader(p1.getErrorStream()));

// read the output from the command
System.out.println("Here is the standard output of the command:\n");
while ((s= stdInput.readLine()) != null)
{

System.out.println(s);
}

// read any errors from the attempted command
System.out.println("Here is the standard error of the command (if any):\n");
while ((s= stdError.readLine()) != null)
{
System.out.println(s);
}
//System.exit(0);
I am getting following message at my prompt:
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.

Also if I want to run
$who > temp
in java, can anyone please tell me how to run it?

thanks
bandya