CODEWITHSUNDEEP
java
Subbu
Subbu

Reputation: 83

Java File System: UNC path is missing sharename

I have a situation to access a shared folders. Following is a sample java program.

import java.nio.file.*;

/**
 * Test
 */
public class Test
{
  public static void main(String[] args)
  {
    String strPath = "//WG0202";
    Path path = FileSystems.getDefault().getPath(strPath).getRoot();
    if (path != null)
    {
      System.out.println(path.toFile().exists());
    }
  }
}

Let us assume as below - Computer name: WG0202

A folder shared in this computer is: TestFolder

So if I give the path as: //WG0202/TetFolder

Then it works fine.

But if I give the path as: //WG0202

Then it is failing with the below exception -

Exception in thread "main" java.nio.file.InvalidPathException: UNC path is missing sharename: //WG0202
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:118)
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
    at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
    at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)

Upvotes: 2

Views: 15513

Answers (2)

Frode
Frode

Reputation: 399

An UNC path is indeed made out of a host and a share. You are trying to use UNC without a share, as your exception states.

To clarify:

//WG0202/TestFolder

is a valid UNC path:

//WG0202/

is not.

Cheers

Upvotes: 4

Anirban Nag 'tintinmj'
Anirban Nag 'tintinmj'

Reputation: 5762

From Official Javadoc of File

User interfaces and operating systems use system-dependent pathname strings to name files and directories. This class presents an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:

  1. An optional system-dependent prefix string, such as a disk-drive specifier, "/"for the UNIX root directory, or "\\\\" for a Microsoft Windows UNC pathname, and

  2. A sequence of zero or more string names.

The first name in an abstract pathname may be a directory name or, in the case of Microsoft Windows UNC pathnames, a hostname. Each subsequent name in an abstract pathname denotes a directory; the last name may denote either a directory or a file. The empty abstract pathname has no prefix and an empty name sequence.

Upvotes: 1

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