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 0th 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
