# How can I know whether a file path is absolute or not?

**URL:** <https://www.ruby-forum.com/t/how-can-i-know-whether-a-file-path-is-absolute-or-not/145119>\
**Category:** Ruby\
**Created:** [August 6, 2008, 6:55am UTC](https://www.ruby-forum.com/t/how-can-i-know-whether-a-file-path-is-absolute-or-not/145119 "2008-08-06T06:55:33Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kyung\_won\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/47e85d/32.png) [@Kyung\_won\_C](https://www.ruby-forum.com/u/Kyung_won_C)\
**Post date:** [August 6, 2008, 6:55am UTC](https://www.ruby-forum.com/t/how-can-i-know-whether-a-file-path-is-absolute-or-not/145119/1 "2008-08-06T06:55:33Z")

</div>

In Java Language

java.io.File

isAbsolute()

…

I cannot find in ruby lib…

---

<div class="post-metadata">

**Author:** ![Kyung\_won\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/47e85d/32.png) [@Kyung\_won\_C](https://www.ruby-forum.com/u/Kyung_won_C)\
**Post date:** [August 6, 2008, 7:08am UTC](https://www.ruby-forum.com/t/how-can-i-know-whether-a-file-path-is-absolute-or-not/145119/2 "2008-08-06T07:08:35Z")

</div>

You’re probably looking for the absolute? method of the Pathname class.

---

<div class="post-metadata">

**Author:** ![Kyung\_won\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/47e85d/32.png) [@Kyung\_won\_C](https://www.ruby-forum.com/u/Kyung_won_C)\
**Post date:** [August 8, 2008, 1:10am UTC](https://www.ruby-forum.com/t/how-can-i-know-whether-a-file-path-is-absolute-or-not/145119/3 "2008-08-08T01:10:12Z")

</div>

On Wed Aug 6 13:53:56 2008, Kyung won Cheon wrote:

> In Java Language
> 
> java.io.File
> 
> isAbsolute()
> 
> …
> 
> I cannot find in ruby lib…

Pathname#absolute?[1]

[1]  
[http://www.ruby-doc.org/stdlib/libdoc/pathname/rdoc/classes/Pathname.html#M001766](http://www.ruby-doc.org/stdlib/libdoc/pathname/rdoc/classes/Pathname.html#M001766)