Method containsAll

classpath/java/util/TreeMap.java:235–248

(Collection<?> c)

    }

    public boolean containsAll(Collection<?> c) {
      if (c == null) {
        throw new NullPointerException("collection is null");
      }
      
      Iterator<?> it = c.iterator();
      while (it.hasNext()) {
        if (! contains(it.next())) {
          return false;
        }
      }
      
      return true;
    }

    public boolean add(V value) {
      throw new UnsupportedOperationException();