我在编译时遇到找不到符号错误

import java.io.File;
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.io.*;
 import java.io.InputStream;
 class pbdemo {

     static public void main(String[] args) throws Exception {
         String s;
         try {
             ProcessBuilder pb = new ProcessBuilder("cmd", "/f", "dir");
             pb.directory(new File("F:\\WINDOWS"));
             pb.start();
             BufferedReader br = new BufferedReader(new InputStreamReader(pb.getInputStream()));

             while ((s = br.readLine()) != null)
             System.out.println(s);

         } catch (Exception e) {
             System.out.println("sorry" + e);
         }
     }
 }

有什么问题

BufferedReader br=new BufferedReader(new InputStreamReader(pb.getInputStream()));

我得到找不到符号错误。

简单的回答。

ProcessBuilder没有getInputStream method.

看这个：流程构建器 http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/ProcessBuilder.html

您可以使用：

BufferedReader br=new BufferedReader(new InputStreamReader(pb.start().getInputStream()));