new LinkedHashSet()
import java.util.LinkedHashSet; import java.util.Set; public class Main { public static Set fill(Set a, int size) { for (int i = 0; i < size; i++) a.add(new Integer(i)); return a; } public static void test(Set a) { fill(a, 10); System.out.println(a); } public static void main(String[] args) { test(new LinkedHashSet()); } }