Using CMD as a Process

Question

I\'m trying to run commands straight through the CMD on Windows (Terminal on Linux). I have the following code. It\'s acting very strangely. First, when run the program does

Answer 1

I found this code on the net years ago. I cant remember where. It's pretty old so there might be something better out there now.

 private void executeCommand(String cmd) {
        try {
            Runtime rt = Runtime.getRuntime();

            Process proc = rt.exec(cmd);

            // any error message?
            StreamHandler errorGobbler = new StreamHandler(proc.getErrorStream(), "ERR");

            // any output?
            StreamHandler outputGobbler = new StreamHandler(proc.getInputStream(), "OUT");

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

            // any error???
            int exitVal = proc.waitFor();
            System.out.println("ExitValue: " + exitVal);
        } catch (Exception e) {
            e.printStackTrace();
        }


    }

And the class:

import java.util.*;
import java.io.*;

public class StreamHandler extends Thread {
    InputStream is;
    String type;
    OutputStream os;

    StringBuffer output;

    StreamHandler(InputStream is, String type) {
        this(is, type, null);
    }

    StreamHandler(InputStream is, String type, OutputStream redirect) {

        this.is = is;
        this.type = type;
        this.os = redirect;
        output = new StringBuffer(100);
    }

    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();
        }
    }
}