Texture rename

package fr.minecraftforgefrance.texturerenaming;

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

public class Main
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        File workDir = new File(sc.next());
        for(File file : workDir.listFiles())
        {
            String newName = file.getName();
            newName = newName.replace("_", "");
            char[] name = newName.toCharArray();
            for(int i = 0; i < name.length; i++)
            {
                if(Character.isUpperCase(name[i]))
                {
                    if(i == 0)
                    {
                        newName = newName.replace(name[i], Character.toLowerCase(name[i]));
                    }
                    else
                    {
                        newName = newName.replace(String.valueOf(name[i]), "_" + Character.toLowerCase(name[i]));
                    }
                }
            }
            System.out.println(newName);
            file.renameTo(new File(workDir, newName));
        }
        sc.close();
    }
}