A simple programme that finds all the file extensions of the files in a directory and recursively in its subdirectories

GetExtensions.java

package main;

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

public class GetExtensions 
{

	private static int fileCounter;
	private static LinkedList<String> Extensions;
	
	public static void main(String[] args) 
	{
		fileCounter = 0;
		Extensions = new LinkedList<String>();	
		Scanner read = new Scanner(System.in);
		
		System.out.print("Directory: ");
		String dirText = read.next();
		
		AddToFileList(dirText);
		
		java.util.Collections.sort(Extensions);
		int extCounter = Extensions.size();
		while(!Extensions.isEmpty())
		{
			System.out.println(Extensions.pop());
		}
		System.out.println("Total: " + extCounter + " extensions in " + fileCounter + " files.");
		
		
		
	}

	private static void AddToFileList(String dirText) 
	{
		File dir = new File(dirText);		
		if (dir.isFile())
		{
			String[] pieces = dirText.split("[.]");
			if(pieces.length>1)
			{
				String currentExtension = pieces[pieces.length-1].toLowerCase();
				if(!Extensions.contains(currentExtension))
				{
					Extensions.add(currentExtension);
				}
			}
			fileCounter++;
			
		}
		else
		{
			String[] ToAdd = dir.list();			
			for(int i=0;i<ToAdd.length;i++)
			{
				AddToFileList(dirText + "\\" + ToAdd[i]);
			}
		}
		
	}
	
}