int read; //实现ping命令
                 try {            Process ps = Runtime.getRuntime().exec("ping 127.0.0.1");      
      InputStream is = ps.getInputStream();        
    while ( (read = is.read()) != -1) {              
  System.out.print( (char) read);          
  }             
    }              
   catch (IOException ex) {         
   ex.printStackTrace();                
       }           
try { //用ie打开网页          
  String str = "E:\\java-api\\index.html";      
      Runtime.getRuntime()