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About Byron Kiourtzoglou

Byron Kiourtzoglou
Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Replace Vector elements using index example

With this example we are going to demonstrate how to replace Vector elements using index. The Vector API provides methods for such operations. In short, to replace elements in a Vector using index you should:

  • Create a new Vector.
  • Populate the vector with elements, with add(E e) API method of Vector.
  • Invoke set(int index, E element) API method of Vector, with parameters the element to be replaced and its index. The method replaces the element in the specified index with the given element.
  • We can use get(int index) API method to get the elements of the Vector and check if the element that was replaced exists in the Vector.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.core;
 
import java.util.Vector;
 
public class ReplaceElementVectorIndex {
 
  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");
 
    /*

Use Object set(int index, Object obj) operation to replace an element at 

the specified index of Vector. It returns the element previously at 

the specified position.
    */
    vector.set(1,"element_4");
 
    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
element_4
element_3

 
This was an example of how to replace Vector elements using index in Java.

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