Java tutorial
import java.util.Arrays; import java.util.LinkedHashSet; public class Main { public static void main(String[] args) { LinkedHashSet linkedHashSet = new LinkedHashSet(10); linkedHashSet.add("1"); linkedHashSet.add("2"); linkedHashSet.add("java2s.com"); Object[] objArray = linkedHashSet.toArray(); System.out.println(Arrays.toString(objArray)); } }