прупупу

package files;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

public class Files
{
    public static String root_dir = "/Users/kolinsol/Desktop/_temp_downloads";
    public static void main(String[] args)
    {
        File root_folder = new File(root_dir);
        dsCheck(root_dir);
        filrNamesList(root_folder);
        System.out.println(dirSize(root_folder));
        ArrayList<File> files = new ArrayList<>(Arrays.asList(root_folder.listFiles()));
        String[] file_names = fileNamesToString(root_folder.listFiles());
        for (String file_name : file_names)
        {
            System.out.println(file_name);
        }
        fileRenamer(root_folder.listFiles(),file_names);
    }

    public static void dsCheck(String path)
    {
        try
        {
            File ds_store = new File (path+"/.DS_Store");
            if (ds_store.exists())
            {
                ds_store.delete();
                System.out.println("ds_store deleted.");
            }
            else
            {
                System.out.println("no ds_store.");
            }
        }
        catch (NullPointerException e)
        {
            System.out.println("wrong filename.");
        }
    }

    public static void filrNamesList(File dir)
    {
        try
        {
            for (File child:dir.listFiles())
                System.out.println(child.toString());
        }
        catch (NullPointerException e)
        {
            System.out.println("the folder is empty.");
        }
    }

    public static int dirSize (File dir)
    {
        return dir.listFiles().length;
    }

    public static String[] fileNamesToString(File[] files)
    {
        String[] file_names = new String[files.length];
        for (int i=0; i<file_names.length;i++)
        {
            file_names[i]=files[i].toString();
            file_names[i] = file_names[i].replaceAll(root_dir+"/", "");
            file_names[i] = file_names[i].replace("[www.MP3Fiber.com]","");
            file_names[i] = file_names[i].replace("_", " ");
            file_names[i] = file_names[i].toLowerCase();
            file_names[i] = file_names[i].replace("prod", " p/ ");
            file_names[i] = file_names[i].replace("feat", " w/ ");
            file_names[i] = file_names[i].replace("production", " p/ ");
            file_names[i] = file_names[i].replace("featuring", " w/ ");
            file_names[i] = file_names[i].replace("ft", " w/ ");
            file_names[i] = file_names[i].replace("  ", " ");
        }
        return(file_names);
    }

    public static void fileRenamer(File[] files, String[] file_names)
    {
        if(files.length==file_names.length)
        {
            for(int i=0; i<files.length;i++)
                files[i].renameTo(new File(root_dir+"/"+file_names[i]));
        }
        else
        {
            System.out.println("wrong nuber of files.");
        }
    }
}