java批量修改文件名的实现方法

import java.io.*; 
 
class filesRename 
{ 
  public static void main(String[] args) throws IOException 
  { 
    String str1 = new String("这里是需要删除的文件名前缀"); 
    int sublen = str1.length(); 
     
    String dir = "f:\\java1"; 
    File f = new File(dir); 
    File[] f1 = f.listFiles(); 
     
    for(File r :f1) 
    { 
      String strsub = r.getName(); 
      String newName = strsub.substring(sublen); 
       
      File newDir = new File(dir+"\\"+newName);  ; 
       
      sop("rename::"+newDir+"__________"+r.renameTo(newDir)); 
    } 
     
  } 
  public static void sop(Object obj) 
  { 
    System.out.println(obj); 
  } 
}