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