Copying and Cloning Sets: public Object clone() : HashSet « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. HashSet

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]