Find Duplicates using Stream API

import java.util.Arrays;

import java.util.List;

import java.util.Map;

import java.util.function.Function;

import java.util.stream.Collectors;

import java.util.stream.Stream;

class Main {

public static void main(String[] args) {

String arr[] = {"abcd", "java", "dcba", "ajav", "xyz", "epam", "pame", "aepm"};

Map<String, Long> occurrences = Stream.of(arr)

.map(s -> s.split(""))

.map(stringArray -> {

Arrays.sort(stringArray);

return stringArray;

})

.map(stringArray -> String.join("", stringArray))

.collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));

System.out.println("Ocurrences found:" + occurrences);

}

}