Group by in Java 8 using streams and lambdas

Application.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Application {

    public static void main(String[] args) {

        List<String> l = new ArrayList(Arrays.asList("one", "two", "three"));
        Map<Integer, Long> result = l.stream()
                .collect(Collectors.groupingBy((String str) -> str.length(), Collectors.counting()));

        System.out.print(result);
        //{3=2, 5=1}
    }
}