Stack firstElement() method in Java with Example

The Java.util.Stack.firstElement() method in Java is used to retrieve or fetch the first element of the Stack. It returns the element present at the 0^th index of the Stack

Syntax:

Stack.firstElement()

Parameters: The method does not take any parameter.

Return Value: The method returns the first element present in the Stack.

Below programs illustrate the Java.util.Stack.firstElement() method:

Program 1:

// Java code to illustrate firstElement()
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("4");
        stack.add("Geeks");

        // Displaying the Stack
        System.out.println("Stack: " + stack);

        // Displaying the first element
        System.out.println("The first element is: "
                           + stack.firstElement());
    }
}

Output:

Stack: [Welcome, To, Geeks, 4, Geeks]
The first element is: Welcome

Program 2:

// Java code to illustrate firstElement()
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);

        // Displaying the Stack
        System.out.println("Stack: " + stack);

        // Displaying the first element
        System.out.println("The first element is: "
                           + stack.firstElement());
    }
}

Output:

Stack: [10, 15, 30, 20, 5]
The first element is: 10