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    <p>You found a bug in the implementation/documentation of the zipfs.The documentation of the Path.get methods states:</p> <pre><code>* @throws FileSystemNotFoundException * The file system, identified by the URI, does not exist and * cannot be created automatically </code></pre> <p>edit: In the case of FileSystems that need closing it might be better to require the programmer to call newFileSystem so that he can close it. The documentation should better read "if it should not be created" automatically.</p> <p>ZipFs never tries to create a new filessystem. A failed get() is not caught but passed to be caller before an attempted newFileSystem call. See in the source:</p> <pre><code>public Path getPath(URI uri) { String spec = uri.getSchemeSpecificPart(); int sep = spec.indexOf("!/"); if (sep == -1) throw new IllegalArgumentException("URI: " + uri + " does not contain path info ex. jar:file:/c:/foo.zip!/BAR"); return getFileSystem(uri).getPath(spec.substring(sep + 1)); } </code></pre> <p>In other words:</p> <pre><code>Paths.get() </code></pre> <p>should be enough for all FileSystems based on nio2. With the zipfs design.</p> <pre><code>Path path; try { path = Paths.get( uri ); } catch ( FileSystemNotFoundException exp ) { try( FileSystem fs = FileSystems.newFileSystem( uri, Collections.EMPTY_MAP )) {; path = Paths.get( uri ); ... use path ... } } </code></pre> <p>Is the short form of your workaround.</p> <p>Note: The nio documentation states that the getFileSystem must use/return the FileSystems created by the matching newFileSystem.</p>
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    1. PONIO2: how to generically map a URI to a Path?
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    1. COI too was wondering if this were a bug, but I think explicitly creating the file system using `FileSystems.newFileSystem` makes sense. Creating a new zipfs means _opening_ the underlying zip file, a file that must eventually be closed. This is why `FileSystem` implements `Closeable`. So the reason `Paths.get(uri)` does not automatically open a zipfs is because the designers wanted the opening and closing of the zipfs `FileSystem` object to be explicitly done by the programmer. At least, that's my conjecture. :) That's why I used try-with-resources in my sample code above.
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    2. CO@cambecc I changed my answer. The difference is between 'should be opened automatically' and 'can be opened automatically'. A
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    3. CO@cambecc If you rely on the oracle documented behaviour of getFileSystem to return only and exactly the previously openen FileSystems form newFileSystem you can write the code as in the changed answer. This only leaves a strange feeling about closing a FileSystem that is in use at a different place / thread.
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