// Java program to perform a Unix command on Suns
// By Dan Hyde, October 4, 2002
// See Java classes "Process" and "Runtime" in API
// 
// To use, enter the Unix command on the command line as:
//
//     java UnixCommand ls -l
//
// The command can use redirection of input and out with < and > 
//
//     java UnixCommand date > out

import java.io.*;  // need for IOException

class UnixCommand {

    UnixCommand(String [] args){

	try{	 

	    // commands need to be in a String array 
	    // with one token per element

	    String [] command = new String[3];
	    command[0] = "xterm";
	    command[1] = "-bg";
	    command[2] = "white";

            // To use "command" variable uncomment the .exec( command )
	    // line and comment the .exec( args ) line

	    // Process p = Runtime.getRuntime().exec( command );
	    Process p = Runtime.getRuntime().exec( args );

	    // wait until it's done executing if needed
	    p.waitFor();

	    // read the output from the command
	    // NOTE: Some commands also send parts of their output to a
	    // "standard error stream", when an error occurs. 
	    // Then you need to use getErrorStream() as well.

	    InputStream p_out = p.getInputStream();
	    BufferedReader out_buf = 
		new BufferedReader( new InputStreamReader(p_out));

	    String line = "";

	    while( (line = out_buf.readLine() ) != null) {
		System.out.println("SOUT: " + line );
	    }

	    // Note: getOutputStream() is used to connect to the standard 
	    // input of the command's process if you need to supply input.

	}
	catch( InterruptedException e2){
	    System.out.println(" error in waitFor ");
	}
	catch( IOException e ){
	    System.out.println(" Bad I/O ");
	}

    }

    public static void main(String args[]){

	UnixCommand a = new UnixCommand( args );

    }
}