Stack Overflow for Teams is a private, secure spot for you and The fact that a URI can identify a resources by both name and location has lead to a lot of the confusion in my opinion. I don't think there is any sort of ironclad rule about when something has to be a URI vs a URL. Note that File doesn't need to point to something local, just something that the host platform understands in the context of file access, e.g. For starters, URI stands for uniform resource identifier and URL stands for uniform resource locator.
As I understand them, you could categorize them as following: It would be easier if they would be merged into one class - they are really confusing :D, (I just took a look at the documentation - look at docs.oracle.com). The difference between URI and URL may be a bit confusing, but the following section will guide you through both the above topics and try to increase your understanding regarding the difference between URI and URL. If these are features you need, then File or Path provide them. What's the difference between a method and a function? What's the logic behind dividing rental price of capital and wage rate by price level? What's the simplest way to print a Java array? An abstract, generic piece of data that can be located and read. My answer is something I wrote for my own benefit, trying to explain the difference from a layman's perspective. URL uses a network protocol e.g. Remember in Java a File object does not really represents "a file" but the location (the full name, with path) of a file. URLs: An URL is a definite location on the internt (just a normal webaddress like - stackoverflow.com). URI vs URL vs URN? A URN may be used to talk about a resource without implying its location or how to access it. @kibibyte: I would expect the call to be blocking, to have an asynchronous implementation of hashcode and equals now that would be very unsettling.
URL is a susbset of URI with URL usually representing resources accessible over http. Every URL is a URI; Every URN is a URI; URI and URL are NOT interchangeable – a URL is a URI, but a URI is not always a URL; URLs always contain an access mechanism.
URL on the other hand is really a resource locator and offers you features to actually read the resource via registered URLStreamHandlers. URIs: Ever URL is an URI. What is this oddly shaped hinged device with indentations? Bash arithmetic outputs result in decimal, Ubuntu 20.4 unable to locate a package which can be listed by pressing tab for autocomplete. URL vs. URI vs. URN, What’s the difference / examples. URNs are a type of URI, just like URLs. Can lightning occur in stars like the Sun? ;). Where File necessarily points to a "file" as understood by the host platform, Path is more generic: it represents a file (resource) in an arbitrary file system. The File class represents a resource that is reachable through the platform's native file system. As such, a URL is a non-persistent type of the URI. Also be aware that that URL#getFile is unrelated to java.io.File. Comparison Chart; Definition; Key Differences; Conclusion The "abstract representation" part is quoted from the API docs. Since a URL identifies a resource using one of the URI schemes, it is a subset of URI. Difference Between Identifier and Variable, Difference Between GET and POST Method in HTML, Difference Between Keyword and Identifier, Difference Between Logical and Physical Address in Operating System, Difference Between Preemptive and Non-Preemptive Scheduling in OS, Difference Between Synchronous and Asynchronous Transmission, Difference Between Paging and Segmentation in OS, Difference Between Internal and External fragmentation, Difference Between while and do-while Loop, Difference Between Pure ALOHA and Slotted ALOHA, Difference Between Recursion and Iteration, Difference Between Go-Back-N and Selective Repeat Protocol. Files, URIs, and URLs conflicting in Java, The Overflow #44: Machine learning in production. For example, in the International Standard Book Number (ISBN) system, ISBN 0-486-27557-4 identifies a specific edition of Shakespeare's play Romeo and Juliet. Lastly - and most importantly - why do I need File object; why isn't a Resource (URL) enough? What's the difference between a Resource, URI, URL, Path and File in Java? Temperature change in Earth atmosphere models? From the JRE point of view, it's just a term. with very limited rights/privileges/security clearance, Java makes a clear (theoretical) difference between a file (something on the local file system) and a resource (something it needs to read). If you mount a ZIP file as a file system in your OS, then File will read its contained entries just fine. The difference between URI and URL is conceptual and mostly academic, but URI is better defined in a formal sense, and covers a wider range of use cases. URLs can lead to file-system resources and you can construct URL for every file system resource by using file:// protocol (hence File <-> URL relation). A URI may refer to a web page, a book, or a document. I would note that this code is unlikely to work as intended. In short, the main difference between a URI and a URL is that the former acts as a resource identify either by location name or both, while the latter acts as the location. URI is used to define an item's identity. http, https etc to retrieve resource from its location.
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