cellulant_test.java

package dev.cellulant.test;


import java.util.*;

public class Main {
    public static String[] uniqueNames(String[] names1, String[] names2) {
        ArrayList<String> firstNameList = new ArrayList<>();
        ArrayList<String> secondNameList = new ArrayList<>();

        firstNameList.addAll(Arrays.asList(names1));
        secondNameList.addAll(Arrays.asList(names2));

        Set<String> set =  new LinkedHashSet<>(firstNameList);
        set.addAll(secondNameList);

        List<String> combinedNamesList = new ArrayList<>(set);
        List<String> listTwoCopy = new ArrayList<>(secondNameList);
        listTwoCopy.removeAll(firstNameList);
        firstNameList.addAll(listTwoCopy);

        String[] parsedArray = new String[firstNameList.size()];
        parsedArray = firstNameList.toArray(parsedArray);
        return parsedArray;
    }

    public static void main(String[] args) {
        String[] names1 = new String[]{"Ava", "Emma", "Olivia"};
        String[] names2 = new String[]{"Olivia", "Sophia", "Emma"};
        System.out.println(String.join(", ", Main.uniqueNames(names1, names2))); // should print Ava, Emma, Olivia, Sophia
    }
}