Java tutorial
import java.util.Arrays; import java.util.HashSet; import java.util.Set; public class Main { public static void main(String[] a) { String elements[] = { "A", "B", "C", "D", "E" }; HashSet<String> set = new HashSet<String>(Arrays.asList(elements)); elements = new String[] { "E", "F" }; set.addAll(Arrays.asList(elements)); System.out.println(set); } }