Method contains

classpath/java/util/ArrayDeque.java:232–247

(Object element)

  }

  @Override
  public boolean contains(Object element) {
    Iterator<T> it = iterator();
    while (it.hasNext()) {
      T next = it.next();
      if (next == null) {
        if (element == null) {
          return true;
        }
      } else if (next.equals(element)) {
        return true;
      }
    }
    
    return false;
  }

  @Override
  public boolean containsAll(Collection<?> c) {