在Java中获取一个集的Powerset
{1, 2, 3}
{{}, {2}, {3}, {2, 3}, {1, 2}, {1, 3}, {1, 2, 3}, {1}}
Set
Set<Integer> mySet = new HashSet<Integer>();mySet.add(1);mySet.add(2);mySet.add(3);Set<Set<Integer>> powerSet = getPowerset(mySet);
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