Copy all elements of Java HashSet to an Object Array

Declare a HashSet and add elements −

Set<Integer> hs = new HashSet<Integer>();
hs.add(15);
hs.add(71);
hs.add(82);
hs.add(89);
hs.add(91);
hs.add(93);
hs.add(97);
hs.add(99);

To copy all the elements, use the toArray() method −

Object[] obArr = hs.toArray();

The following is an example to copy all elements to HashSet to an object array −

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      Set<Integer> hs = new HashSet<Integer>();
      hs.add(15);
      hs.add(71);
      hs.add(82);
      hs.add(89);
      hs.add(91);
      hs.add(93);
      hs.add(97);
      hs.add(99);
      System.out.println("Elements in set = "+hs);
      System.out.println("Copying all elements...");
      Object[] obArr = hs.toArray();
      for (Object ob : obArr)
      System.out.println(ob);
   }
}

Output

Elements in set = [97, 82, 99, 71, 89, 91, 93, 15]
Copying all elements...
97
82
99
71
89
91
93
15

Karthikeya Boyini

Published on 10-Jan-2019 09:33:01

• Related Questions & Answers
• Copy all elements of Java LinkedHashSet to an Object Array
• Copy all elements of ArrayList to an Object Array in Java
• Copy all elements in Java TreeSet to an Object Array
• Convert elements in a HashSet to an array in Java
• Python program to copy all elements of one array into another array
• Remove all elements from a HashSet in Java
• Create an object array from elements of LinkedList in Java
• Add elements to HashSet in Java
• Iterate through elements of HashSet in Java
• Add all the elements from a collection to the HashSet in Java
• Iterate over the elements of HashSet in Java
• Copy all the elements from one set to another in Java
• Convert array to HashSet in Java
• Remove all elements from a HashSet in C#
• How to copy a specific section of an array in Java?