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