Input data를 통한 파일 이름/확장자 변경

FileRename.java

package com.tistory.seungdols.file.rename;

        import java.io.File;
        import java.util.Scanner;

/**
 * @PROJECT effectiveJava
 * @PACKAGE com.tistory.seungdols.File.rename
 * @WRITTER Administrator
 * @DATE 2015-09-21
 * @HISTORY
 * @DISCRIPT
 */
public class FileRename {

    /**
     * data field
     */
    String fileNewName;
    String fileOriginName;
    String path;
    String extOrigin;
    String extNew;

    File originFile;
    File newFile;

    /**
     * Contructor
     */
    public FileRename() {

    }



    /**
     * extract fileName and ext
     * @param originalName
     */
    public void extractName(String originalName)
    {

        extOrigin            = originalName.substring(originalName.lastIndexOf("."));
        System.out.println(extOrigin);
    }

    /**
     * call a extractName method
     * set a new name of File
     */
    public void newFileName()
    {
        extractName(fileOriginName);
        fileNewName = fileNewName + extNew;
        System.out.println("newFileName : " + fileNewName);
    }

    /**
     * Rename method
     * call inputDataForRename()
     * call newFileName()
     * execute rename
     */
    public void renameFileOne(){
        inputDataForRename(1);
        newFileName();
        originFile = new File(path+fileOriginName);
        newFile    = new File(path+fileNewName);
        System.out.println("renameFileOne : " + path+fileOriginName);
        System.out.println("renameFileOne : " + path+fileNewName);
        if(originFile == null)
        {
            System.out.println("originfile is null");
        }
        if(newFile == null)
        {
            System.out.println("newFile is null");
        }
        if(originFile.renameTo(newFile))
        {
            System.out.println("Rename Successful");
        }else{
            System.out.println("Rename Failed");
        }

    }

    /**
     * (Only file) Rename All in Directory
     */
    public void renameAllFileInDirectory()
    {
        inputDataForRename(2);
        int number = 0;
        File fPath = new File(path);//해당 경로의 파일
        File[] list = fPath.listFiles();//get file list
        for (File file : list){
            if(file.isFile())//Is file? true
            {
                //get file name
                fileOriginName = file.getName();
//                System.out.println("file : " + file.getName());
                //set new name of file
                StringBuilder sb = new StringBuilder(path);
                sb.append(fileNewName).append(number).append(extNew);
                File origin = new File(path+fileOriginName);
                File newFileName = new File(sb.toString());
                if(origin.renameTo(newFileName))
                {
                    System.out.println("change name of file");
                    number++;
                }

            }

        }

    }

    public void inputDataForRename(int FLAG)
    {
        Scanner scan = new Scanner(System.in);
        switch (FLAG)
        {
            case 1:
                System.out.println("path of file  : ");
                path            = scan.nextLine();
                System.out.println("Origin Name of file  : ");
                fileOriginName  = scan.nextLine();
                System.out.println("New name of file  : ");
                fileNewName     = scan.nextLine();
                System.out.println("newExt of file  : ");
                extNew          = scan.nextLine();
                break;
            case 2:

                System.out.println("path of directory  : ");
                path            = scan.nextLine();
                System.out.println("New name of file  : ");
                fileNewName     = scan.nextLine();
                System.out.println("newExt of file  : ");
                extNew          = scan.nextLine();
                break;
        }

    }
}