java i/o流-----缓冲流

package com;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class Demo3 {public static void main(String[] args) throws FileNotFoundException {BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("c:\\a.txt")));BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("c:\\r.txt")));String str = null;try {while((str = br.readLine())!=null){bw.write(str);bw.newLine();bw.flush();}bw.close();br.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}//br.readLine();}}