如何从标准输入读取非阻塞？

    long end=System.currentTimeMillis()+60*10;
    InputStreamReader fileInputStream=new InputStreamReader(System.in);
    BufferedReader bufferedReader=new BufferedReader(fileInputStream);
    try
    {
        while((System.currentTimeMillis()<end) && (bufferedReader.readLine()!=null))
        {

        }
        bufferedReader.close();
    }
    catch(java.io.IOException e)
    {
        e.printStackTrace();
    }
    long end=System.currentTimeMillis()+60*10;