Java merge arrays and remove duplicate elements

/**
 * @author lautturi.com
 * Java example: how to merge two arrays and remove duplicates in java
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		
		int[] arr1 = {1, 3, 5, 2, 4};
		int[] arr2 = { 1,4,2,7,5,16,12,8,13,28 };
		Set<Integer> set = new TreeSet<>();

        for (int i = 0; i < arr1.length; i++) {
            set.add(arr1[i]);
        }

        for (int i = 0; i < arr2.length; i++) {
            set.add(arr2[i]);
        }

        System.out.println(set);    
		
	}
}

output:

[1, 2, 3, 4, 5, 7, 8, 12, 13, 16, 28]