FULL PRODUCT VERSION :
java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux Xavier 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
On a Linux system, one cannot create relative Path objects.

There are 3 ways to do so:
- Path#relativize(Path otherPath)
- Path#subPath(int startIndex, int endIndex)
- Path#getName(int nameIndex)

Attempting to use either of these three ways to create a relative path will return a completely unexpected path. Instead of returning a relative path, a path to the present working directory plus the relative path is returned.

For example, "a/b".relativize("a/b/c/d") should return "c/d". However, it returns "path/to/working/directory/a/b/c/d"

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create an absolute path (e.g. "/home/user/directory")
2. Create another absolute path based on the first (e.g. "/home/user/directory/file.txt")
3. Create a relative path using either of the three methods: #relativize, #subPath, #getName
4. Print `relativePath.toAbsolutePath().toString()`

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The included source code should print:

Printing [relative file]
Relative path: absoluteFile.txt
Absolute Path: /home/user/absoluteFile.txt
Printing [subPath file]
Relative path: absoluteFile.txt
Absolute Path: /home/user/absoluteFile.txt
Printing [namePath]
Relative path: absoluteFile.txt
Absolute Path: /home/user/absoluteFile.txt
ACTUAL -
The included source code actually prints:

Printing [relative file]
Relative path: absoluteFile.txt
Absolute Path: /home/user/path/to/working/directory/absoluteFile.txt
Printing [subPath file]
Relative path: absoluteFile.txt
Absolute Path: /home/user/path/to/working/directory/absoluteFile.txt
Printing [namePath]
Relative path: absoluteFile.txt
Absolute Path: /home/user/path/to/working/directory/absoluteFile.txt

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
    public static void main(String args[]) {
        String userHome = System.getProperty("user.home");
        Path absoluteBase = Paths.get(userHome);
        Path absoluteFile = Paths.get(userHome, "absoluteFile.txt");

        Path relativeFile = absoluteBase.relativize(absoluteFile);
        Path subPathFile = absoluteFile.subpath(absoluteFile.getNameCount() - 1, absoluteFile.getNameCount());
        Path namePathFile = absoluteFile.getName(absoluteBase.getNameCount());

        printRelativeAndAbsoluteStrings(relativeFile, "relative file");
        printRelativeAndAbsoluteStrings(subPathFile, "subPath file");
        printRelativeAndAbsoluteStrings(namePathFile, "namePath file");
    }

    public static void printRelativeAndAbsoluteStrings(Path path, String name) {
        System.out.println("Printing " + name);
        System.out.println("\tRelative path: " + path.toString());
        System.out.println("\tAbsolute Path: " + path.toAbsolutePath().toString());
    }
---------- END SOURCE ----------