字符缓冲区读写文件

import java.io.*;

public class Demo07
{
   public static void main(String s[])throws Exception
   {
       InputStream          is  = new FileInputStream("Demo05.java");
       Reader               re  = new InputStreamReader(is);
       BufferedReader       bis = new BufferedReader(re);
       
       OutputStream         os  = new FileOutputStream("Demo05.txt");
       Writer               wr  = new OutputStreamWriter(os);
       BufferedWriter       bos = new BufferedWriter(wr);
       
       //1  成行读
       char data[]=new char[50];
       int id;
       
       while((id=bis.read(data))!=-1)
       {
           bos.write(data);
           String str = new String(data);
           System.out.print(str);
           Thread.sleep(2000);
       }
       bis.close();bos.close();
       is.close();os.close();
   }
}