sort to put areas with most units on top

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Language: Java

Posted by: Jenya Mia

Added: Mar 19, 2019 12:36 PM

Tags: map streams

Map<String<Set<String>> unitsByZone = new LinkedHashMap<>();
Comparator<Set<String>> comparator = Comparator.comparing(Set::size, Comparator.reverseOrder());
unitsByZone = unitsByZone.entrySet().stream().sorted(Map.Entry.comparingByValue(comparator))
.collect(Collectors.toMap(Map.Entry::getKey,
Map.Entry::getValue,
(e1, e2) -> e1, LinkedHashMap::new));