How to remove duplicates from List?
(a) HashSet listToSet = new HashSet(duplicateList);
(b) HashSet listToSet = duplicateList.toSet();
(c) HashSet listToSet = Collections.convertToSet(duplicateList);
(d) HashSet listToSet = duplicateList.getSet();
The question was asked in an international level competition.
This is a very interesting question from Data Structures-List in portion java.util – The Collections Framework of Java
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