Java：IO流之转换流

import java.io.*;
class TransStreamDemo
{
    public static void main(String[] args)throws IOException
    {
        /*
        //从键盘录入数据
        InputStream in = System.in;
        
        //将字节流对象转换为字符流对象，使用转换流，InputStreanReader
        InputStreamReader isr = new InputStreamReader(in);
        
        //为了提高效率，将字符串进行高效技术操作，即创建字符流缓冲区流对象
        BufferedReader bufr = new BufferedReader(isr);
        */

        //上面三个句子简写成：键盘录入最常见写法
        BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
  
        // OutputStream out = System.out;
        // OutputStreamWriter osr = new OutputStreamWriter(out);
        // BufferedWriter bufw = new BufferedWriter(osr);
              
        //上面三个句子简写成：
        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();
        }
        bufr.close();
              
        /*
        String line = null;
        while((line = bufr.readLine())!=null)
        {
            if("over".equals(line))
                break;
            System.out.println(line.toString());
        }
        buf.close();
        */
    }
}