Deleting Empty directory in java

Scenario:

Path: /users/country/CAN/DateFolder1 more directories /users/country/CAN/DateFolder2 /users/country/CAN/DateFolder3

DateFolder1 and DateFolder2 are empty.

I want to delete datefolder when they are empty, but i can’t mention the datefolder name exclusively

using below, i am able to delete directory till the path i mention, but need logic to search. for inner directories only after the specified path.

FileSystemUtils.deleteRecursively(Paths.get(“/Users/country/CAN/”));

Answer

To delete empty folders inside /users/country/CAN without recurcy:

File dataFolder = new File("/users/country/CAN");
File[] dataFolderContent = dataFolder.listFiles();
if (dataFolderContent != null && dataFolderContent.length > 0) {
    for (File item : dataFolderContent) {
        if (item.isDirectory()) {
            File[] itemContent = item.listFiles();
            if (itemContent != null && itemContent.length == 0) {
                item.delete();
            }
        }
    }
}

Update. For example root folder is /users/country and we need to remove all empty folders at a certain depth from root. In case from your comment depth=2. I used most simple IO as task is simple. If you want NIO you can find about Files.walk(Path path, int depth).

public void deleteEmpty(File folder, int depth) {
    if (folder.isDirectory()) {
        if (depth == 0) {
            String[] folderContent = folder.list();
            if (folderContent != null && folderContent.length == 0) {
                folder.delete();
            }
        } else {
            depth--;
            File[] listFiles = folder.listFiles();
            if (listFiles != null && listFiles.length > 0) {
                for (File file : listFiles) {
                    deleteEmpty(file, depth);
                }
            }
        }
    }
}

Update 2. Example with NIO.

final int targetDepth = 2;
final Path path = Paths.get("/users/country");
try (Stream<Path> walk = Files.walk(path, targetDepth)) {
    walk.filter(Files::isDirectory).forEach(folderPath -> {
        if ((folderPath.getNameCount() - path.getNameCount()) == targetDepth) {
            File folder = folderPath.toFile();
            String[] list = folder.list();
            if (list != null && list.length == 0) {
                folder.delete();
            }
        }
    });
}

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