Java操作应用——在Java中执行某个shell命令

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import  java.io.BufferedReader;

import  java.io.InputStream;

import  java.io.InputStreamReader;

public  class  ShellCommandExec {

     public  static  void  main(String[] args) {

         String gnomeOpenCommand =  "gnome-open //home//user//Documents//MyDoc.pdf" ;

         try  {

             Runtime rt = Runtime.getRuntime();

             Process processObj = rt.exec(gnomeOpenCommand);

             InputStream stdin = processObj.getErrorStream();

             InputStreamReader isr =  new  InputStreamReader(stdin);

             BufferedReader br =  new  BufferedReader(isr);

             String myoutput =  "" ;

             while  ((myoutput=br.readLine()) !=  null ) {

                 myoutput = myoutput+ "/n" ;

             }

             System.out.println(myoutput);

         }

         catch  (Exception e) {

             e.printStackTrace();

         }

     }

}