Java | 7 [updated]

For parallel processing (divide and conquer).

WatchService watcher = FileSystems.getDefault().newWatchService(); Path dir = Paths.get("/tmp"); dir.register(watcher, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE); WatchKey key = watcher.take(); for (WatchEvent<?> event : key.pollEvents()) System.out.println("Event: " + event.kind() + " on " + event.context()); java 7

// Before Java 7 BufferedReader br = null; try br = new BufferedReader(new FileReader("file.txt")); br.readLine(); catch (IOException e) e.printStackTrace(); finally { if (br != null) try br.close(); catch (IOException e) {} } // Java 7 try (BufferedReader br = new BufferedReader(new FileReader("file.txt"))) br.readLine(); catch (IOException e) e.printStackTrace(); For parallel processing (divide and conquer)

1. Language Changes (Project Coin) Try-with-Resources (AutoCloseable) Automatically closes resources implementing AutoCloseable . class MyRecursiveTask extends RecursiveTask&lt

class MyRecursiveTask extends RecursiveTask<Long> private long workload; MyRecursiveTask(long w) workload = w; protected Long compute() if (workload < 2) return workload; MyRecursiveTask subtask = new MyRecursiveTask(workload - 1); subtask.fork(); return workload + subtask.join();

Path path = Paths.get("/home/user/data.txt"); // Create/delete Files.createDirectories(path.getParent()); Files.deleteIfExists(path); // Copy Files.copy(Paths.get("source.txt"), Paths.get("dest.txt"), StandardCopyOption.REPLACE_EXISTING); // Read all lines (small files) List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8); // Walk a directory try (DirectoryStream<Path> stream = Files.newDirectoryStream(Paths.get("/home"))) for (Path entry : stream) System.out.println(entry.getFileName());

// br automatically closed try // some code catch (SQLException | IOException e) // single block logger.log(e); throw new MyAppException(e);