Method addAll

classpath/java/util/ArrayDeque.java:158–172

(Collection<? extends T> c)

  }

  @Override
  public boolean addAll(Collection<? extends T> c) {
    if (c == null || c.isEmpty()) {
      return false;
    }
    
    ensureCapacity(size() + c.size());
    
    Iterator<? extends T> it = c.iterator();
    while (it.hasNext()) {
      add(it.next());
    }
    
    return true;
  }

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