Java:IO流的综合用法(从键盘录入数据并打印在控制台上)

 import java.io.*;
 public class IOTestDouble
 {
     public static void main(String[] args)throws Exception
     {
         BufferedReader bufr = null;
         BufferedWriter bufw = null;
         try
         {
             bufr = new BufferedReader(new InputStreamReader(System.in));//读入流路径为键盘录入
             bufw = new BufferedWriter(new OutputStreamWriter(System.out));//输出流路径为控制台输出
             String line = null;
             //从键盘读取数据
             while((line = bufr.readLine()) != null)
             {
                 bufw.newLine();
                 if(line.equals("quit"))
                     break;
             //将数据打印在控制台上
                 bufw.write(line);
             }
         }
         catch(IOException ie)
         {
             throw new RuntimeException("读入读取流异常");
         }
         finally
         {
             try
             {
                if(bufr!=null)
                   bufr.close();
             }
             catch(IOException ie)
             {
                throw new RuntimeException("读取流关闭异常");
             }
             try
             {
                if(bufw!=null)
                   bufw.close();
             }
             catch(IOException ie)
             {
                throw new RuntimeException("输出流关闭异常");
             }
         }
     }
 }