Java 做"更改名程式"

import java.io.*;public class ReplaceNameManager{    private String replacedText;    private String replaceWithText;        public ReplaceNameManager(String fileName, String replacedText, String replaceWithText) {        super(fileName);        this.replacedText = replacedText;        this. replaceWithText=  replaceWithText;    }        public void rename(File f) {        if(replacedText == null)            return;                    String filename = f.getName();        String replaceWithThis = "";        if( replaceWithText != null)            replaceWithThis = replaceWithText;             String newname = f.getParent() + File.separatorChar +              filename.replaceAll( replacedText, replaceWithThis);                f.renameTo(new File(newname));          }}