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);
    }
}