package com.yyq;/* * 字节流的缓冲区 */import java.io.*;public class CopyMP3 {    public static void main(String[] args) throws Exception {        long start = System.currentTimeMillis();        copy_1();        long end = System.currentTimeMillis();        System.out.println(end-start);    }    public static void copy_1() throws Exception{        BufferedInputStream bufis = new BufferedInputStream(                new FileInputStream("1.jpg"));        BufferedOutputStream bufos = new BufferedOutputStream(                new FileOutputStream("2.jpg"));        byte[] buf = new byte[1024];        int num = 0;        while((num = bufis.read(buf))!=-1){            bufos.write(buf);        }    }}