Stack toArray() method in Java with Example

Last Updated : 24 Dec, 2018

The toArray() method of Stack class in Java is used to form an array of the same elements as that of the Stack. Basically, it copies all the element from a Stack to a new array.

Syntax:

Object[] arr = Stack.toArray()

Parameters: The method does not take any parameters.

Return Value: The method returns an array containing the elements similar to the Stack.

Below programs illustrate the Stack.toArray() method:

Program 1:

   // Java code to illustrate toArray() 
  
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<String> stack = new Stack<String>(); 
  
        // Use add() method to add elements into the Stack 
        stack.add("Welcome"); 
        stack.add("To"); 
        stack.add("Geeks"); 
        stack.add("For"); 
        stack.add("Geeks"); 
  
        // Displaying the Stack 
        System.out.println("The Stack: " + stack); 
  
        // Creating the array and using toArray() 
        Object[] arr = stack.toArray(); 
  
        System.out.println("The array is:"); 
        for (int j = 0; j < arr.length; j++) 
            System.out.println(arr[j]); 
    } 
} 
 
  

Output:

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

Program 2:

   // Java code to illustrate toArray() 
  
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<Integer> stack = new Stack<Integer>(); 
  
        // Use add() method to add elements into the Stack 
        stack.add(10); 
        stack.add(15); 
        stack.add(30); 
        stack.add(20); 
        stack.add(5); 
        stack.add(25); 
  
        // Displaying the Stack 
        System.out.println("The Stack: " + stack); 
  
        // Creating the array and using toArray() 
        Object[] arr = stack.toArray(); 
  
        System.out.println("The array is:"); 
        for (int j = 0; j < arr.length; j++) 
            System.out.println(arr[j]); 
    } 
} 
 
  

Output:

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

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