Last Updated : 11 Jul, 2025
The java.util.vector.firstElement() method in Java is used to retrieve or fetch the first element of the Vector. It returns the element present at the 0th index of the vector
Syntax:
Vector.firstElement()
Parameters: The method does not take any parameter.
Return Value: The method returns the first element present in the Vector. Below programs illustrate the Java.util.Vector.firstElement() method:
Program 1:
Java
// Java code to illustrate firstElement()
import java.util.*;
public class VectorDemo {
public static void main(String args[])
{
// Creating an empty Vector
Vector<String> vec_tor = new Vector<String>();
// Use add() method to add elements into the Vector
vec_tor.add("Welcome");
vec_tor.add("To");
vec_tor.add("Geeks");
vec_tor.add("4");
vec_tor.add("Geeks");
// Displaying the Vector
System.out.println("Vector: " + vec_tor);
// Displaying the first element
System.out.println("The first element is: "
+ vec_tor.firstElement());
}
}
Output:
Vector: [Welcome, To, Geeks, 4, Geeks] The first element is: Welcome
Program 2:
Java
// Java code to illustrate firstElement()
import java.util.*;
public class VectorDemo {
public static void main(String args[])
{
// Creating an empty Vector
Vector<Integer> vec_tor = new Vector<Integer>();
// Use add() method to add elements into the Vector
vec_tor.add(10);
vec_tor.add(15);
vec_tor.add(30);
vec_tor.add(20);
vec_tor.add(5);
// Displaying the Vector
System.out.println("Vector: " + vec_tor);
// Displaying the first element
System.out.println("The first element is: "
+ vec_tor.firstElement());
}
}
Output:
Vector: [10, 15, 30, 20, 5] The first element is: 10
Time complexity: O(1).
Auxiliary Space: O(n). // n is the size of the vector.
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