this my first post here, i hope you can help me
my question is :
i have two Arraylist one for rooms (for example) and the other for house, when i want to add a room to specific house i need to find that house in the houselist first, then i need to have internal list inside houselist to add the room to that house (house1[room1,room2,room3],house2[room1]). but i don't know how to implement a list inside a list? any idea?
thanks in advance