ArrayDeque toArray() Method in Java (original) (raw)

Last Updated : 10 Dec, 2018

The java.util.ArrayDeque.toArray() method is used to form an array of the same elements as that of the Deque. Basically, the method copies all the element from this deque to a new array.Syntax:

Object[] arr = Array_Deque.toArray()

Parameters: The method does not take any parameters.Return Value: The method returns an array containing the elements present in the ArrayDeque. Below programs illustrate the java.util.ArrayDeque.toArray() method.Program 1:

Java `

// Java code to illustrate toArray() import java.util.*;

public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque de_que = new ArrayDeque();

    // Use add() method to add elements into the Deque
    de_que.add("Welcome");
    de_que.add("To");
    de_que.add("Geeks");
    de_que.add("For");
    de_que.add("Geeks");

    // Displaying the ArrayDeque
    System.out.println("The ArrayDeque: " + de_que);

    // Creating the array and using toArray()
    Object[] arr = de_que.toArray();

    System.out.println("The array is:");
    for (int j = 0; j < arr.length; j++)
        System.out.println(arr[j]);
}

}

`

Output:

The ArrayDeque: [Welcome, To, Geeks, For, Geeks] The array is: Welcome To Geeks For Geeks

Program 2:

Java `

// Java code to illustrate toArray() import java.util.*;

public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque de_que = new ArrayDeque();

    // Use add() method to add elements into the Deque
    de_que.add(10);
    de_que.add(15);
    de_que.add(30);
    de_que.add(20);
    de_que.add(5);
    de_que.add(25);

    // Displaying the ArrayDeque
    System.out.println("The ArrayDeque: " + de_que);

    // Creating the array and using toArray()
    Object[] arr = de_que.toArray();

    System.out.println("The array is:");
    for (int j = 0; j < arr.length; j++)
        System.out.println(arr[j]);
}

}

`

Output:

The ArrayDeque: [10, 15, 30, 20, 5, 25] The array is: 10 15 30 20 5 25