List
     
       command = new ArrayList
      
       ();        command.add("ping");        ProcessBuilder processBuilder = new ProcessBuilder(command);        Process process = processBuilder.start();        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream(), "gbk"));        StringBuffer stringBuffer = new StringBuffer();        String line = null;        while((line = reader.readLine())!=null){            stringBuffer.append(line);            stringBuffer.append("\n");        }        System.out.println(stringBuffer.toString());        reader.close();