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Sorting AtomicLongMap by value

I am using guava AtomicLongMap to count the number of phrases in a document.

AtomicLongMap frequentPhrases = AtomicLongMap.create();
frequentPhrases.getAndIncrement(phrase.trim());

Everything works like a charm, but I can't find a way to sort this card by the number of occurrences.

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1 answer


You can save records to List

, and then sort them by record value in reverse order:



List<Map.Entry<Object, Long>> sorted = 
    new ArrayList<>(frequentPhrases.asMap().entrySet());
Collections.sort(sorted, Collections.reverseOrder(Map.Entry.comparingByValue()));

for (Map.Entry<Object, Long> entry : sorted) {
    System.out.println(entry); // Or something more useful
}
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