java 调用程序

 public static void main(String ar[]){
        Process process;
        try {
//            String ls_1;
//            process = Runtime.getRuntime().exec("cmd /c dir c://windows");
//            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
//            while ( (ls_1=bufferedReader.readLine()) != null)
//            System.out.println(ls_1);
//            process.waitFor( );

            process = Runtime.getRuntime().exec("C://Program Files//Microsoft Office//Office12//winword.exe  c://a.doc");
            process.waitFor();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }