键盘读入读出（文件读入读出 操作字符流）

package test;


import java.io.*;
import java.util.*;

import privateclass.MyBufferedReader;

public class Main {

	private static final String space_operator = " ";
	private static final double pi = Math.PI;
	private static final String LINE_SEPARATOR = System.getProperty("line.separator");
	public static void main(String[] args) throws Exception {
		
		//我们用buffered的时候操作流，只要是流就可以操作
		//读文件等等
		//BufferedReader bfr = new BufferedReader(new InputStreamReader(new FileInputStream("demo.txt")));
		//BufferedWriter bfw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("kuku.txt")));
		/**
		 * BuferedReader 缓冲区
		 *我们将字节流转换成为字符流
		 *System.in是字节流 == IntputStream
		 *然后我们用到工具InputStreamReader转换成为字符流
		 *放到缓冲区里面这样速度更加的快
		 */
		BufferedReader bfr = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bfw = new BufferedWriter(new OutputStreamWriter(System.out));
		
		String line = null;
		while((line = bfr.readLine()) != null)
		{
			if(line.equals("over"))break;
			bfw.write(line.toUpperCase());
			bfw.newLine();
			bfw.flush();
		}
	}
}