Java Vector - add() Method

The java.util.Vector.add() method is used to insert the specified element at specified index in the vector. The method shifts the current element at the specified position (if any) and any subsequent elements to the right by adding one to their indices. Addition of new element results into increasing the vector size by one.

Syntax

public void add(int index, E element)

Here, E is the type of element maintained by the container.

Parameters

Return Value

void type.

Exception

Throws IndexOutOfBoundsException, if the index is out of range i.e., (index < 0 || index > size()).

Example:

In the example below, the java.util.Vector.add() method is used to insert new element at specified position in the vector.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a vector
    Vector<Integer> MyVector = new Vector<Integer>();

    //populating vector
    MyVector.addElement(10);
    MyVector.addElement(20);
    MyVector.addElement(30);

    //inserting new element in the vector
    MyVector.add(1,100);
    System.out.println("MyVector contains: " + MyVector); 

    //inserting new element in the vector
    MyVector.add(0,500);
    System.out.println("MyVector contains: " + MyVector);    
  }
}

The output of the above code will be:

MyVector contains: [10, 100, 20, 30]
MyVector contains: [500, 10, 100, 20, 30]