Java - File - mkdirs doesn't make dirs

Question

new File(filePath, "/classes/").mkdirs();

filePath is a directory and it exists. classes is a new directory, that should be created

I believe that mkdirs thinks that classes is a file and doesn't do anything, but when I execute

new File(filePath, "/tyhdtyurtu/classes/").mkdirs();

/tyhdtyurtu/classes/ it's created! How to fix this thing? How to create all needed dirs?

UPD: Inside this folder I also have classes.jar file and when I try to create /classes/ dir it fails. But when I try to create, for example, classes1, it works. Why?

UPD2:

System.out.println(new File(apkName, "classes").exists());
System.out.println(new File(apkName, "classes").mkdirs());
System.out.println(new File(apkName, "classes").exists());
System.out.println(new File(apkName, "classes").isDirectory());
System.out.println(new File(apkName, "classes").getAbsolutePath());

Output:

false
true
true
true
C:\Users\Admin\Videos\App\classes

When I copy the link from output to explorer, I see error message that explorer cannot find this path. And if I'm able to create ANY folder except of this, I don't think I have no any permissions

you don't need the leading and trailing slashes. Does removing them fix anything? — JP Moresmau, Jul 24 '15 at 15:03
Do you know if any exceptions are being thrown? Did a file named "classes" already exist? What if you just use "/tysdjksdfsk" instead of a two-level path? — Ellen Spertus, Jul 24 '15 at 15:05
do you have an existing file named `classes` in the directory denoted by `filepath`? — wero, Jul 24 '15 at 15:10
@wero, Yes, I can. But when I run mkdirs (returns true) and exists (true too), but I cannot access that neither from explorer nor java. — ivan, Jul 24 '15 at 15:17
File.mkdirs() returns a boolean indicating success. You should always be evaluating the return value of this method call and take appropriate actions. — Mark W, Jul 24 '15 at 15:21
Possible duplicate: http://stackoverflow.com/questions/8257765/mkdirs-not-working-in-windows-7 — Kelly S. French, Jul 24 '15 at 15:30
did you run chkdsk just in case of errors in the filesystem? — wero, Jul 24 '15 at 16:27

score 1 · Answer 1 · answered Jul 24 '15 at 15:17

1

You need to check 2 things

1. you have write permissions
2. the directory exists or not

you can refer to the following link

http://www.ekiras.com/2015/06/how-to-create-nested-folders-in-java.html

answered Jul 24 '15 at 15:17

Ekansh Rastogi

2,418
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score 1 · Answer 2 · answered Jul 24 '15 at 15:28

1

Check return value to know whether the dir was created
Use Apache Utils FileUtils.html#forceMkdir(java.io.File) to create directory with all parents if parents do not exist

answered Jul 24 '15 at 15:28

Pavel Bernshtam

4,232
8
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score 0 · Answer 3 · answered Jul 24 '15 at 15:09

0

You should code as the followings:

 new File(filePath, "classes").mkdirs();
 new File(filePath, "tyhdtyurtu/classes").mkdirs();

answered Jul 24 '15 at 15:09

user3359139

430
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Java - File - mkdirs doesn't make dirs

3 Answers3