Deep copy HashSet

HashSet<Integer> set = new HashSet<Integer>();
HashSet<Integer> set2 = new HashSet<Integer>();
set2.addAll(set);

or

HashSet<Integer> set = new HashSet<Integer>();
HashSet<Integer> set2 = new HashSet<Integer>(set);

Deep copy HashMap

HashMap<Integer, Integer> map = new HashMap<>();
HashMap<Integer, Integer> map2 = new HashMap<>();
map2.putAll(map);

or

HashMap<Integer, Integer> map = new HashMap<>();
HashMap<Integer, Integer> map2 = new HashMap<>(map);

Anyway, Good luck, Richardo! -- 09/27/2016