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Java Vector firstElement() Method with Example

Vector Class firstElement() method: Here, we are going to learn about the firstElement() method of Vector Class with its syntax and example.
Submitted by Preeti Jain, on March 17, 2020

Vector Class firstElement() method

• firstElement() method is available in java.util package.
• firstElement() method is used to retrieves the first element of this Vector.
• firstElement() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• firstElement() method may throw an exception at the time of returning the first element.
  NoSuchElementException: This exception may throw when this Vector is blank.

Syntax:

    public Element firstElement();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is Element, it returns the first element of this Vector.

Example:

// Java program to demonstrate the example 
// of Element firstElement() method 
// of Vector 

import java.util.*;

public class FirstElementOfVector {
    public static void main(String[] args) {
        // Instantiates a Vector object  with
        // initial capacity of "10"
        Vector < String > v = new Vector < String > (10);

        // By using add() method is to add the
        // elements in this v
        v.add("C");
        v.add("C++");
        v.add("JAVA");

        // Display Vector
        System.out.println("v: " + v);

        // By using firstElement() method is to
        // return the first element exists
        // in this vector v
        Object ele = v.firstElement();

        // Display returned element
        System.out.println("v.firstElement(): " + ele);
    }
}

Output

v: [C, C++, JAVA]
v.firstElement(): C