Check if a path represents a file or a folder

Question

I need a valid method to check if a String represents a path for file or a directory. What are valid directory names in Android? As it comes out, folder names c

Answer 1

To check if a string represents a path or a file programatically, you should use API methods such as isFile(), isDirectory().

How does system understand whether there's a file or a folder?

I guess, the file and folder entries are kept in a data structure and it's managed by the file system.