java通过file批量修改文件夹内的文件名称

package com.core.test;import java.io.File;/** * Created by hgg on 2017/10/10. */public class testFile {    public static void main(String[] args) {        updateFileName();    }    public static void updateFileName() {        File file = new File("D:/tmp/head");        File fs[] = file.listFiles();        int seq = 1;        for (int i=0;i<fs.length;i++){            //新文件放入head_new文件夹中（并从1开始编号）            File newFile = new File("D:/tmp/head_new/pin_user_head_"+(seq++)+".jpg");            fs[i].renameTo(newFile);        }    }}