How to check if a file exists within a subdirectory of a directory in Java?

Question

This is my current code:

File f = new File(folder, fileName);
if (!f.exists()) {
    log.warn("Unable to find file");
} 
else{
    f.delete();
}

My problem is that this will always be true in the current context since I have two subfolders that have been generated and hashed. So let's assume I have a leading directory called "data storage" with two sub-directories with randomly hashed names. The file is within the two subdirectories. Is there an easy way to check if my file is within an entire directory, including sub-directories?

Thanks!

Does this answer your question? [Check if file is in (sub)directory](https://stackoverflow.com/questions/18227634/check-if-file-is-in-subdirectory) — Kemal Abdic, Sep 09 '22 at 09:04
Try to avoid the old cumbersome file api (`File`). It got replaced by NIO (`Files`, `Path`). Its easier to use, has better error messages and less irritating behavior. — Zabuzard, Sep 09 '22 at 09:05
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score 2 · Answer 1 · answered Sep 09 '22 at 09:09

2

You could use Files.walk()

Path folderPath = folder.toPath();
boolean containsFile = Files.walk(folderPath)
                              .anyMatch(p -> p.getFileName().toString().equals(fileName));

answered Sep 09 '22 at 09:09

René Link

48,224
13
108
140

score 0 · Answer 2 · answered Sep 09 '22 at 09:38

0

Use this

File f = new File("yourfilepath/filename.ext");
if(f.exists()){
    System.out.println("success");
}
else{
    System.out.println("fail");
}

answered Sep 09 '22 at 09:38

Naveen Roy

85
12

How to check if a file exists within a subdirectory of a directory in Java?

2 Answers2