Maps: sort entries by value with a stream

Map.Entry.comparingByValue gives a ready-made comparator, and LinkedHashMap preserves the order the stream produced.

Code

Map<String, Integer> sales = new HashMap<>();
sales.put("north", 300);
sales.put("south", 900);
sales.put("east", 150);

LinkedHashMap<String, Integer> topFirst = sales.entrySet().stream()
        .sorted(Map.Entry.<String, Integer>comparingByValue().reversed())
        .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
                (a, b) -> a, LinkedHashMap::new));

topFirst.forEach((region, amount) -> System.out.println(region + " " + amount));

Output

south 900
north 300
east 150

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Published 2026-07-30