Java 7 new features

Java 7 new features

• 1.
  Java 7 NewFeatures
• 2.
  Diamond Operator Map<String, List<Offer>>offers = new HashMap<>();
• 3.
  Strings in switchstatements String status = offer.getStatus(); switch(status) { case NEW: newOffer(offer); Case Label break; case PENDING: toString() pendingOffer(offer); break; default: break; }
• 4.
  Automatic Resource Management Automatic close Multiple Resources try(FileOutputStream fos = new FileOutputStream(“movies.txt”); DataOutputStream dos = new DataOutputStream(fos)) { dos.writeUTF(“Java 7 New Features”) } catch (IOException e) { ... } Implements java.lang.AutoCloseable try-with-resources statement
• 5.
  Numeric literals with underscore int thousand = 1_000; int million = 1_000_000;
• 6.
  Binary literals int two = 0b10; int forty = 0b101_000;
• 7.
  Improved exception handling try{ methodThatThrowsThreeExceptions(); } catch (ExceptionOne | ExceptionTwo | ExceptionThree e) { ... } Multi-catch block
• 8.
  NIO 2.0 ● Working with Path: Path, Paths, FileSystem, FileSystems, ... ● File change notifications: WatchService, WatchKey
• 9.
  Fork and JoinFramework ● ForkJoinPool int numberOfProcessors = Runtime.getRunTime().availableProcessors(); ● RecursiveAction ForkJoinPool pool = new (void compute()) ForkJoinPool(numberOfProcessors) … ● RecursiveTask<V> public class BigProblemTask extends (V compute()) RecursiveAction { @Override protected void compute() { // your problem invocation goes here } } … pool.invoke(task);