java-执行dos命令

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Random;

public static void main(String[] args) throws InterruptedException
{
    try{
        File dir = new File("D:\\");
        String dos = "c:\\windows\\system32\\cmd.exe /c dir";
 //"c:\\windows\\system32\\cmd.exe --cmd名利地址
// /c 
//dir--cmd 命令行中执行的命令，列出文件";       
//    java执行命令行程序 dos命令行，dir:命令行执行的目录
        Process p = Runtime.getRuntime().exec(dos,null,dir);

        BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));  
        StringBuffer s = new StringBuffer();
        String line = null;  
        while((line= br.readLine()) != null)
        {  
//    将执行结果打印到控制台
          System.out.println(line);  
            
        }  
        
          
    }catch(IOException e)
    {
        e.printStackTrace();
    }
    
}