ping和Date

Question

try{
        //rt.exec("cmd");
        
        pc=rt.exec("ping  10.241.60.210 -t");
       isr=new InputStreamReader(pc.getInputStream());
        br=new BufferedReader(isr);
        //System.out.println(pc); 
       String line;
       while((line=br.readLine())!=null)
        {
                Date date1=new Date();
        System.out.println(line+"-->>"+date1);//時間總顯示兩次﹐為什么?
             }
        }catch(Throwable t)
          {
                t.printStackTrace();
           }      

Answer 1

while((line=br.readLine())!=null)
错！