I would like to show all file extensions in a specific folder and give the total for each extension using `DirectoryStream`.

Now I'm only showing all the files in that folder, but how do I get their extensions only instead?
I should also get the extensions of these files and count the total for each extension in that folder (see output below).

```
public static void main (String [] args) throws IOException {

    Path path = Paths.get(System.getProperty("user.dir"));

    if (Files.isDirectory(path)){
        DirectoryStream<Path> directoryStream = Files.newDirectoryStream(path);

        for (Path p: directoryStream){
            System.out.println(p.getFileName());
        }
    } else {
        System.out.printf("Path was not found.");
    }
}

```

The output should look like this.
I suppose the best way to get this output is using lambdas?

```
FILETYPE    TOTAL
------------------
CLASS    |  5
TXT      |  10
JAVA     |  30
EXE      |  27

```