Directory stream with Java 8 lambda
Short snippet how to leave 100 newest text files in directory and delete others with help of Java 8 lambda.
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String pattern = "**.txt"; int fileCapacity = 100; Path path = Paths.get("your/directory/"); PathMatcher ldfMatcher = FileSystems.getDefault().getPathMatcher("glob:" + pattern); try (DirectoryStream files = Files.newDirectoryStream(path)) { StreamSupport.stream(files.spliterator(), false) // sequential stream .filter(file -> Files.isRegularFile(file) && ldfMatcher.matches(file)) .sorted((Path o1, Path o2) -> { try { return Files.getLastModifiedTime(o2).compareTo(Files.getLastModifiedTime(o1)); } catch (IOException ex) { // exception handling... } }) .skip(fileCapacity) .forEach(file -> { try { Files.delete(file); } catch (IOException ex) { // exception handling... } }); } catch (IOException ex) { // exception handling... } |
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