In Java: create unique random filename in a directory

Question

How do I create a random unique filename in a directory (of my choice)?

Note: I don’t want this file in the system temp path but rather in the directory I specify

And did you look in the File class, perhaps at a method named createTempFile? — President James K. Polk, Jan 13 '10 at 03:02
@JamesKPolk I did, and then I ended up here because I did not find any method in the `File` class that does that; certainly not `createTempFile`; that would be OK if I wanted to create the file, which is not what this question asks, regardless of whether the OP wants that or not. — SantiBailors, Dec 01 '16 at 08:55

score 14 · Accepted Answer · edited Apr 22 '23 at 07:08

14

File.createTempFile() allows you to specify a directory so:

File uniqueFile = File.createTempFile("post", ".html", new File("/var/www/doc"));

edited Apr 22 '23 at 07:08

Koedlt

answered Jan 13 '10 at 03:05

cletus

score -8 · Answer 2 · answered Jan 13 '10 at 03:06

-8

You want the File.createTempFile(String, String, File) overload.

Which you would have seen immediately had you bothered to look at the documentation.

answered Jan 13 '10 at 03:06

Anon.

2 Answers2