Vector firstElement() Method in Java Last Updated : 24 May, 2023 Comments Improve Suggest changes Like Article Like Report 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. Comment More infoAdvertise with us Next Article Vector firstElement() Method in Java K kundankumarjha Follow Improve Article Tags : Misc Java Java-Collections Java - util package Java-Functions Java-Vector +2 More Practice Tags : JavaJava-CollectionsMisc Similar Reads Vector get() Method in Java The java.util.vector.get() method is used to fetch or retrieve an element at a specific index from a Vector. Syntax: Vector.get(int index) Parameters: This method accepts a mandatory parameter index which is of integer data type. It specifies the position or index of the element to be fetched from t 2 min read Vector addAll() Method in Java In Java, the addAll() method is used to add all elements from a specified Collection to the current Vector. 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