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
