Method size

output/java_guava/1.4.18/Iterators.java:202–209

Returns the number of elements remaining in iterator. The iterator will be left exhausted: its hasNext() method will return false.

(Iterator<?> iterator)

  public static int size(Iterator<?> iterator) {
    long count = 0L;
    while (iterator.hasNext()) {
      iterator.next();
      count++;
    }
    return Ints.saturatedCast(count);
  }

  /**
   * Returns {@code true} if {@code iterator} contains {@code element}.