The toArray() method of Java HashSet is used to form an array of the same elements as that of the HashSet. Basically, it copies all the element from a HashSet to a new array.
Syntax:
Object[] arr = HashSet.toArray()
Parameters: The method does not take any parameters.
Return Value: The method returns an array containing the elements similar to the HashSet.
Below programs illustrate the HashSet.toArray() method:
Program 1:
// Java code to illustrate toArray()  import java.util.*;  public class HashSetDemo {    public static void main(String args[])    {        // Creating an empty HashSet        HashSet<String>            abs_col = new HashSet<String>();          // Use add() method to add        // elements into the HashSet        abs_col.add("Welcome");        abs_col.add("To");        abs_col.add("Geeks");        abs_col.add("For");        abs_col.add("Geeks");          // Displaying the HashSet        System.out.println("The HashSet: "                           + abs_col);          // Creating the array and using toArray()        Object[] arr = abs_col.toArray();          System.out.println("The array is:");        for (int j = 0; j < arr.length; j++)            System.out.println(arr[j]);    }} |
Output:
The HashSet: [Geeks, For, Welcome, To] The array is: Geeks For Welcome To
Program 2:
// Java code to illustrate toArray()  import java.util.*;  public class HashSetDemo {    public static void main(String args[])    {        // Creating an empty HashSet        HashSet<Integer>            abs_col = new HashSet<Integer>();          // Use add() method to add        // elements into the HashSet        abs_col.add(10);        abs_col.add(15);        abs_col.add(30);        abs_col.add(20);        abs_col.add(5);        abs_col.add(25);          // Displaying the HashSet        System.out.println("The HashSet: "                           + abs_col);          // Creating the array and using toArray()        Object[] arr = abs_col.toArray();          System.out.println("The array is:");        for (int j = 0; j < arr.length; j++)            System.out.println(arr[j]);    }} |
Output:
The HashSet: [20, 5, 25, 10, 30, 15] The array is: 20 5 25 10 30 15
