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Showing content from https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html below:

Iterable (Java Platform SE 8 )

• Type Parameters:

  T - the type of elements returned by the iterator

  All Known Subinterfaces:

  BeanContext, BeanContextServices, BlockingDeque<E>, BlockingQueue<E>, Collection<E>, Deque<E>, DirectoryStream<T>, List<E>, NavigableSet<E>, Path, Queue<E>, SecureDirectoryStream<T>, Set<E>, SortedSet<E>, TransferQueue<E>

  All Known Implementing Classes:

  AbstractCollection, AbstractList, AbstractQueue, AbstractSequentialList, AbstractSet, ArrayBlockingQueue, ArrayDeque, ArrayList, AttributeList, BatchUpdateException, BeanContextServicesSupport, BeanContextSupport, ConcurrentHashMap.KeySetView, ConcurrentLinkedDeque, ConcurrentLinkedQueue, ConcurrentSkipListSet, CopyOnWriteArrayList, CopyOnWriteArraySet, DataTruncation, DelayQueue, EnumSet, HashSet, JobStateReasons, LinkedBlockingDeque, LinkedBlockingQueue, LinkedHashSet, LinkedList, LinkedTransferQueue, PriorityBlockingQueue, PriorityQueue, RoleList, RoleUnresolvedList, RowSetWarning, SerialException, ServiceLoader, SQLClientInfoException, SQLDataException, SQLException, SQLFeatureNotSupportedException, SQLIntegrityConstraintViolationException, SQLInvalidAuthorizationSpecException, SQLNonTransientConnectionException, SQLNonTransientException, SQLRecoverableException, SQLSyntaxErrorException, SQLTimeoutException, SQLTransactionRollbackException, SQLTransientConnectionException, SQLTransientException, SQLWarning, Stack, SyncFactoryException, SynchronousQueue, SyncProviderException, TreeSet, Vector

  
  

  public interface Iterable<T>

  Implementing this interface allows an object to be the target of the "for-each loop" statement. See

  For-each Loop

  Since:

  1.5

  See The Java™ Language Specification:

  14.14.2 The enhanced for statement

• • Method Detail
    • iterator

      Iterator<T> iterator()

      Returns an iterator over elements of type T.

      Returns:

      an Iterator.

    • forEach

      default void forEach(Consumer<? super T> action)

      Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of iteration (if an iteration order is specified). Exceptions thrown by the action are relayed to the caller.

      Implementation Requirements:

      The default implementation behaves as if:

      
           for (T t : this)
               action.accept(t);
       

      Parameters:

      action - The action to be performed for each element

      Throws:

      NullPointerException - if the specified action is null

      Since:

      1.8

    • spliterator

      default Spliterator<T> spliterator()

      Creates a

      Spliterator

      over the elements described by this

      Iterable

      .

      Implementation Requirements:

      The default implementation creates an early-binding spliterator from the iterable's Iterator. The spliterator inherits the fail-fast properties of the iterable's iterator.

      Implementation Note:

      The default implementation should usually be overridden. The spliterator returned by the default implementation has poor splitting capabilities, is unsized, and does not report any spliterator characteristics. Implementing classes can nearly always provide a better implementation.

      Returns:

      a Spliterator over the elements described by this Iterable.

      Since:

      1.8

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