java - how to return HashSet from a method? -

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i struggling how recall data stored in hashmap , hashset , method return values stored in them , size data?

public hashset <room>  getoccupiedrooms(){     return occupiedrooms.size(); }

and not compile not sure. , wound return data stored.

cheers

you need iterate on hashset, check every room if it's occupied , add room diffferent hashset.

public hashset<room>  getoccupiedrooms(){ hashset<room> tempset = new hashset<room>(); // iterate start // if room occupied, add room tempset // iterate end // return tempset

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