SortedSet toArray() method in Java with Examples (original) (raw)

Last Updated : 30 Sep, 2019

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 `

// 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 `

// Java code to illustrate toArray()

import java.util.*;

public class SetDemo { public static void main(String args[]) { // Creating an empty SortedSet SortedSet abs_col = new TreeSet();

    // 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()