Method getFirst

output/java_guava/1.4.17/Iterables.java:812–815

Returns the first element in iterable or defaultValue if the iterable is empty. The Iterators analog to this method is Iterators#getNext. If no default value is desired (and the caller instead wants a NoSuchElementException to be thrown), it is recommende

(Iterable<? extends T> iterable, @Nullable T defaultValue)

   */

  @Nullable
  public static <T> T getFirst(Iterable<? extends T> iterable, @Nullable T defaultValue) {
    return Iterators.getNext(iterable.iterator(), defaultValue);
  }

  /**
   * Returns the last element of {@code iterable}. If {@code iterable} is a {@link List} with