java使用基本流和缓冲流操作文件时间对比

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
 
public class demo01 {
    public static void main(String[] args) throws IOException {
        long start=System.currentTimeMillis();
        String str1="D:\\迅雷下载\\jdk-11_windows-x64_bin.exe";
        String str2="D:\\迅雷下载\\jdk-11_windows-x64_bin_01.exe";
        FileInputStream fis = new FileInputStream(str1);
        FileOutputStream fos = new FileOutputStream(str2);
        byte[] bytes = new byte[1024];
        int ten=0;
        while ((ten=fis.read(bytes))!=-1){
            fos.write(bytes,0,ten);
        }
        fos.close();
        fis.close();
        long end=System.currentTimeMillis();
        System.out.println("共耗时"+(end-start));
    }
}

import java.io.*;
 
public class demo02 {
    public static void main(String[] args) throws IOException {
        long start=System.currentTimeMillis();
        String str1="D:\\迅雷下载\\jdk-11_windows-x64_bin.exe";
        String str2="D:\\迅雷下载\\jdk-11_windows-x64_bin_02.exe";
        FileInputStream fis = new FileInputStream(str1);
        FileOutputStream fos = new FileOutputStream(str2);
        BufferedInputStream bis = new BufferedInputStream(fis);
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        byte[] bytes = new byte[1024];
        int ten=0;
        while ((ten=bis.read(bytes))!=-1){
            bos.write(bytes,0,ten);
        }
        bos.close();
        bis.close();
        long end=System.currentTimeMillis();
        System.out.println("共耗时"+(end-start));
    }
}