Java stream reduce to map

by

Thanks @HadiJ for answer

Map<String,Integer> result = Arrays.stream(str)
    .reduce(new HashMap<>(), (hashMap, e) -> {
        hashMap.merge(e, 1, Integer::sum);
        return hashMap;
    },
    (m, m2) -> {
        m.putAll(m2);
        return m;
    }
);

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