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JavaIntermediate#streams
JavaBeginner#streams
What is the difference between Collectors.toList() and Collectors.toSet()?
toList() collects stream elements into a List preserving encounter order and duplicates. toSet() collects into a Set, removing duplicates and with no guaranteed order (unless a specific Set supplier is used).
Example
Stream.of(1,2,2,3).collect(Collectors.toList()); // [1,2,2,3] Stream.of(1,2,2,3).collect(Collectors.toSet()); // [1,2,3] order not guaranteed