Method remove

lib/java/util/TreeMap.java:854–863

(Object object)

        }

        @Override
        public boolean remove(Object object) {
            if (contains(object)) {
                Map.Entry<K, V> entry = (Map.Entry<K, V>) object;
                K key = entry.getKey();
                subMap.remove(key);
                return true;
            }
            return false;
        }
    }

    static class SubMapKeySet <K,V> extends AbstractSet<K> implements Set<K> {