How to use Java 8 `Files.find` method?

Question

I am trying to write an app to use Files.find method in it.

Below program works perfectly :

package ehsan;

/* I have removed imports for code brevity */

public class Main {
    public static void main(String[] args) throws IOException {
        Path p = Paths.get("/home/ehsan");
        final int maxDepth = 10;
        Stream<Path> matches = Files.find(p,maxDepth,(path, basicFileAttributes) -> String.valueOf(path).endsWith(".txt"));
        matches.map(path -> path.getFileName()).forEach(System.out::println);
    }
}

This works fine and gives me a list of files ending with .txt ( aka text files ) :

hello.txt
...

But below program does not show anything :

package ehsan;

public class Main {
    public static void main(String[] args) throws IOException {
        Path p = Paths.get("/home/ehsan");
        final int maxDepth = 10;
        Stream<Path> matches = Files.find(p,maxDepth,(path, basicFileAttributes) -> path.getFileName().equals("workspace"));
        matches.map(path -> path.getFileName()).forEach(System.out::println);
    }
}

But it does not show anything :(

Here is my home folder hiearchy (ls result) :

blog          Projects
Desktop       Public
Documents     Templates
Downloads     The.Purge.Election.Year.2016.HC.1080p.HDrip.ShAaNiG.mkv
IdeaProjects          The.Purge.Election.Year.2016.HC.1080p.HDrip.ShAaNiG.mkv.aria2
Music         Videos
Pictures      workspace

So whats going wrong with path.getFileName().equals("workspace")?

Solution 1

Path.getFilename() does not return a String, but a Path object, do this:

getFilename().toString().equals("workspace")

Solution 2

Use the following and look at the console. Maybe none of your files contains workspace in it

Files.find(p,maxDepth,(path, basicFileAttributes) -> {
    if (String.valueOf(path).equals("workspace")) {
        System.out.println("FOUND : " + path);
        return true;
    }
    System.out.println("\tNOT VALID : " + path);
    return false;
});

Comments

[Admin]

Thanks, Isn't it funny that getFileName() does not actually return file name ! ?

[Admin]

As shown in my Home directory hiearchy, I HAVE a workspace folder :)

[Admin]

Thanks, It was very useful and user friendly :)

[Yassin Hajaj]

@ehsan Youre welcome, I do not know if it is sarcasm but I wasn't being non friendly at all don't worry :) Hope it helped