java批量修改本地文件名

package test;import java.io.File;public class Many_Fix {public static void main(String[] args) {File folder = new File("E:\\day01");//获取该目录下所有文件的File数组File[] fileArray = folder.listFiles();for(File f : fileArray){//System.out.println(f);String name = f.getName();int index = name.indexOf("_");String newName = name.substring(index+1, name.length());//System.out.println(newName);File newFile = new File(folder,newName);f.renameTo(newFile);}}}