Question

I have a String array with the list of files (files and folders) of a path:

File directory = new File(path);
String[] fileNames = directory.list();

When I try to read the file content:

for (int i = 0; i < fileNames.length; i++) {
    try {
        BufferedReader br = new BufferedReader(new InputStreamReader(
           new FileInputStream(path + "\\" + fileNames[i]), "UTF-8"));

If the file is a folder I get a FileNotFoundException.
How can I know before if a file name belongs to a folder. Perhaps by the size of the file?

Answer 1

You can use File#isDirectory method to test whether a file is a directory.

File file = new File("test");
System.out.println(file.isDirectory());

Or, you can use File#listFiles method instead. It only returns the files inside the directory. That way, you won’t have to check whether your file is a directory or not.

File directory = new File(path);
String[] fileNames = directory.listFiles();