Question

How do I pick a random element from a set? I’m particularly interested in picking a random element from a HashSet or a LinkedHashSet, in Java.

Answer 1

int size = myHashSet.size(); int item = new Random().nextInt(size); // In real life, the Random object should be rather more shared than this int i = 0; for(Object obj : myhashSet) {     if (i == item)         return obj;     i++; }