Sort map by value using lambdas and streams

Question

I\'m new to Java 8, not sure how to use streams and it\'s methods to sort. If I have map as below, how to sort this map by value to take only top 10 entries using Java 8.

Answer 1

If you want sort by integer or float value of value object

Map map = new HashMap<>();
map.put("g",new Person(5, "EE", 51, Person.SEX.FEMALE, "A"));
map.put("a",new Person(4, "DD", 25, Person.SEX.MALE, "D"));
map.put("e",new Person(3, "CC", 44, Person.SEX.FEMALE,"B"));

You can use,

Map sortedNewMap = map.entrySet().stream().sorted((e1,e2)->
        Integer.compare(e1.getValue().getAge(), e2.getValue().getAge()))
        .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
                (e1, e2) -> e1, LinkedHashMap::new));