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SortedSet toArray() method in Java with Examples

  • 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:

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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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