Calling the clone() method of a HashSet creates a shallow copy of that HashSet.
(the elements of the set aren't duplicated. Both sets will refer to the same elements.
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class MainClass {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set set = new HashSet(Arrays.asList(elements));
Set set2 = ((Set) ((HashSet) set).clone());
System.out.println(set2);
}
}
[D, A, C, B, E]