import java.io.*;

class TransStream11{

        public static void main(String[] args)throws IOException {

        BufferedReader bufr = new BufferedReader(new InputStreamReader(new FileInputStream("bufw.txt")));

        BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));

        String line = null;

        while((line = bufr.readLine())!=null){

                if("over".equals(line))

                        break;

                bufw.write(line.toUpperCase());

                bufw.newLine();

                bufw.flush();

                }

        }

}

不错，学习了。。。