What does the following code snippet do$?$

Screenshot $2023-09-18185825.$png

It creates a new directory named $"$c:$\backslash$temp$"$ on the file system.

It creates a new text file named "dir" in the $"$c:$\backslash$temp$"$ directory.

It initializes a file object named "dir" with the directory path $"$c:$\backslash$temp$."$

It is not valid Java code and will result in a compilation error.