JÃ nkÃ ping was actually 3 towns that grew into one large town . JÃ nkÃ ping is situated by the southern end of Sweden 's second largest lake , VÃ ttern . The original town JÃ nkÃ ping has grown together with Huskvarna and Norrahammar forming a contiguous urban area , since 1971 wholly within the same municipality .