Changing the Value of an Element in Vector in Java

This example shows how to modify or replace elements in Vector using the set(int index, Object o) of the Vector.

public E set(int index, Object o): replaces the element of the specific position in Vector with the new element o.

import java.util.Vector; 

public class replaceElementVector {

 public static void main(String[] args) {
 Vector< String> vct = new Vector< String> (); 
 //add elements
 vct.add("e1"); 
 vct.add("e2"); 
 vct.add("e3"); 
 vct.add("e4"); 
 
 System.out.println("Before:"); 
 for(String e:vct)
 System.out.println(e); 

 //replace the value of the element at index 2 with e31
 vct.set(2, "e31"); 
 
 System.out.println("\nAfter updated:"); 
 for(String e:vct)
 System.out.println(e); 
 }
}

Runtime:

Before:
e1
e2
e3
e4

After updated:
e1
e2
e31
e4