import java.io.*;					
import java.util.*;

// Count the number of files in a directory and all of its subdirectories recursively

public class DirectorySize {

	public static void main(String[] args) {
		System.out.print("Enter directory name: ");				
		Scanner input=new Scanner(System.in);
		String dir=input.nextLine();
		System.out.println(getSize(new File(dir)) + " files");			// dir is the String of the directory name, use new File(dir) to open this location and pass this File to getSize
	}
	
	public static int getSize(File f)
	{
		int size=0;
		if(f.isDirectory()){											// if f is a directory, collect all of its files and subdirectories and do this method recursively
			File[] files=f.listFiles();
			for(int i=0;files!=null&&i<files.length;i++)
				size+=getSize(files[i]);								// sum up all of the files (we are adding 1 per file, not the file's physical size) 
		}
		else size++;													// if a stand-alone file, add 1
		return size;
	}
}