boolean add(Object element): This method appends the specified element to the end of this vector.
Syntax:
boolean add(Object element)
Parameters: This function accepts a single parameter element as shown in the above syntax. The element specified by this parameter is appended to end of the vector. Return Value: This method returns True after successful execution, else False. Below program illustrates the working of java.util.Vector.add(Object element) method:
Example:
Java
// Java code to illustrate boolean add(Object element)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 in the vector vec_tor.add("Geeks"); vec_tor.add("for"); vec_tor.add("Geeks"); vec_tor.add("10"); vec_tor.add("20"); // Output the present vector System.out.println("The vector is: " + vec_tor); // Adding new elements to the end vec_tor.add("Last"); vec_tor.add("Element"); // Printing the new vector System.out.println("The new Vector is: " + vec_tor); }} |
The vector is: [Geeks, for, Geeks, 10, 20] The new Vector is: [Geeks, for, Geeks, 10, 20, Last, Element]
Time complexity: O(n). // n is the size of the vector.
Auxiliary Space: O(n).
void add(int index, Object element): This method inserts an element at a specified index in the vector. It shifts the element currently at that position (if any) and any subsequent elements to the right (will change their indices by adding one).
Syntax:
void add(int index, Object element)
- Parameters: This method accepts two parameters as described below.
- index: The index at which the specified element is to be inserted.
- element: The element which is needed to be inserted.
