package java8;

import java.util.Comparator;

import java.util.List;

import java.util.Map;

import java.util.TreeSet;

import java.util.stream.Stream;

import static java.util.stream.Collectors.*;

public class CollectorLesson {

public static void main(String[] args) {

Stream.of("one", "two").collect(toCollection(TreeSet::new));

Stream.of("one", "two").collect(maxBy(Comparator.comparing(x -> x)));

Stream.of(1, 2).collect(averagingInt(x -> x));

Map<Boolean, List<Integer>> map = Stream.of(1, 2, 3, 4).collect(partitioningBy(x -> x >2));

Map<Integer, List<Integer>> map2 = Stream.of(1, 2, 1, 4).collect(groupingBy(x -> x));

String result = Stream.of("one", "two", "three").collect(joining(",", "{", "}"));

System.out.println(result);

Map<Integer, Long> map3 = Stream.of(1, 2, 1, 4).collect(groupingBy(x -> x, counting()));

System.out.println(map3.get(1));

Map<Integer, List<Integer>> collect = Stream.of(1, 2, 1, 4).collect(groupingBy(x -> x, mapping(x -> x, toList())));

}

}