In this example we shall show you how to add an element to a specified index of a Vector. The Vector API provides both add(E e) and add(int index, E element) methods, to add an element either at the end of the Vector or at a specified index of a Vector. To add an element to a specified index of a Vector one should perform the following steps:
- Create a new Vector.
- Populate the vector with elements, with
add(E e)API method of Vector. - Invoke
add(int index, E element)API method of Vector, to add an element at the specified index of the Vector,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.Vector;
public class AddElementToSpecifiedIndexVector {
public static void main(String[] args) {
// Create a Vector and populate it with elements
Vector vector = new Vector();
vector.add("element_1");
vector.add("element_2");
vector.add("element_3");
/*
To add an element at the specified index of Vector use
void add(int index, Object obj) method. This method does
NOT overwrite the element previously at the specified index
in the vector rather it shifts the existing elements to right
side increasing the vector size by 1.
*/
vector.add(1,"new_element");
System.out.println("Elements in Vector : ");
for(int i=0; i < vector.size(); i++)
System.out.println(vector.get(i));
}
}
Output:
Elements in Vector :
element_1
new_element
element_2
element_3
This was an example of how to add an element to a specified index of a Vector in Java.
