runcmd code

// !runcmd - Tells the bot to say run a OS command
        if (arguments[0].equalsIgnoreCase(prefix + "runcmd")){
            if(sender.equalsIgnoreCase("Lil-G")){
                ProcessBuilder builder = new ProcessBuilder("cmd.exe");
                Process p=null;
                try {
                    p = builder.start();
                }
                catch (IOException e) {
                    sendMessage(channel, "Error: " + e);
                }
                //get stdin of shell
                BufferedWriter p_stdin = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));

                try {
                    //single execution
                    p_stdin.write(arguments[1]);
                    p_stdin.newLine();
                    p_stdin.flush();
                }
                catch (IOException e) {
                    sendMessage(channel, "Error: " + e);
                }
                // finally close the shell by execution exit command
                try {
                    p_stdin.write("exit");
                    p_stdin.newLine();
                    p_stdin.flush();
                }
                catch (IOException e) {
                    System.out.println(e);
                }

                // write stdout of shell (=output of all commands)
                Scanner s = new Scanner( p.getInputStream() );
                int i = 0;
                while (s.hasNext())
                {
                    sendMessage(channel, s.next());
                }
                s.close();
            }
            else {
                permError(sender, "can use this command");
            }
        }