analyze the theoretical execution time for get and put method.

@Override public void put (Key key, Value value) { } if (key == null) throw new NullPointerException(); if (value!=null) { Association a = getAssociation (key); if (a!=null) { a.value = value; } else { a = new Association (key, value, firstAssociation); firstAssociation = a; numberOfAssociations++; } } else { } delete(key);