The toArray() method of Java SortedSet is used to form an array of the same elements as that of the SortedSet. Basically, it copies all the element from a SortedSet to a new array.
Syntax:
Object[] toArray()
Parameters: The method does not take any parameters.
Return Value: The method returns an array containing the elements similar to the SortedSet.
Note: The toArray() method in SortedSet is inherited from the Set interface in Java.
Below programs illustrate the SortedSet.toArray() method:
Program 1:
// Java code to illustrate toArray() import java.util.*; public class SortedSetDemo { public static void main(String args[]) { // Creating an empty SortedSet SortedSet<String> abs_col = new TreeSet<String>(); // Use add() method to add // elements into the SortedSet abs_col.add("Welcome"); abs_col.add("To"); abs_col.add("Geeks"); abs_col.add("For"); abs_col.add("Geeks"); // Displaying the Set System.out.println("The SortedSet: " + 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 SortedSet: [For, Geeks, To, Welcome] The array is: For Geeks To Welcome
Program 2:
// Java code to illustrate toArray() import java.util.*; public class SetDemo { public static void main(String args[]) { // Creating an empty SortedSet SortedSet<Integer> abs_col = new TreeSet<Integer>(); // Use add() method to add // elements into the SortedSet 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 SortedSet System.out.println("The SortedSet: " + 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 SortedSet: [5, 10, 15, 20, 25, 30] The array is: 5 10 15 20 25 30
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#toArray()
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