Have you used the Set collection in your Java projects?

Yes, the Set collection in Java is used to store unique elements without a specific order. In projects, I used HashSet for fast search and removal of duplicates, as well as TreeSet when sorting of elements is needed. For example, to get unique values from a list:

List<String> list = Arrays.asList("apple", "banana", "apple", "orange");
Set<String> uniqueFruits = new HashSet<>(list);
System.out.println(uniqueFruits); // [banana, orange, apple]