![]() ![]() When it returns false, the file either doesn't exist or the current user doesn't possess the read permission on the file. Similarly, the isDirectory()method returns true if the given path is an existing directory: assertTrue(tempDirectory.isDirectory()) įinally, the canRead()method returns true if the file is readable: assertTrue(tempFile.canRead()) ĪssertFalse(new File("/root/.bashrc").canRead()) The isFile() method, however, returns true if the given path is an existing file: assertTrue(tempFile.isFile()) Therefore, as long as it does exist, it'll return true. Path tempDirectoryPath = Files.createTempDirectory("baeldung-exists-io") įile tempFile = new File(tempFilePath.toString()) įile tempDirectory = new File(tempDirectoryPath.toString()) Īs shown above, the exists() method doesn't care if it's a file or directory. If the file or directory does exist already, it'll return true: Path tempFilePath = Files.createTempFile("baeldung", "exist-io") However, to make sure if a file or directory exists in Java legacy IO world, we can call the exists()method on Fileinstances: assertFalse(new File("invalid").exists()) If we're using Java 7 or a newer version of Java, it's highly recommended to use the modern Java NIO APIs for these sorts of requirements. It's even possible to not follow the symbolic links by passing an appropriate LinkOptionas the second argument: assertTrue(Files.exists(symbolicLink, LinkOption.NOFOLLOW_LINKS)) īecause the link itself exists, the Files.exists(Path) method returns true. Also, we can check if a Path is a symbolic link using the Files.isSymbolicLink(Path)method: Since the link target doesn't exist anymore, following the link won't lead to anything, and Files.exists(Path) will return false. Now if we delete the target of the link, the Files.exists(Path) will return false: leteIfExists(target) Path symbolicLink = Files.createSymbolicLink(symbol, target) Path symbol = Paths.get("test-link-" + ThreadLocalRandom.current().nextInt()) How can I check if other paths are relative to it ( given that I am going to concatenate 'anotherPath' onto 'path' ) For example: String anotherPath '' // relative true // will result in a full path of '/some/path' String anotherPath '/some/more' // relative true // will result in a full. If file A has a symbolic link to file B, then the Files.exists(A) method returns true if and only if the file B exists already: Path target = Files.createTempFile("baeldung", "target") If I have a path: String path '/some/path'. By default, the Files.exists(Path) method follows the symbolic links. ![]()
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