Collections

Create ArrayList from Enumeration example

In this example we shall show you how to create an ArrayList from an Enumeration. We will use a Vector to get the Enumeration from. To create an ArrayList from an Enumeration one should perform the following steps:

  • Create a new Vector.
  • Populate the vector with elements, with the add(E e) API method of the Vector.
  • Invoke the elements() API method of the Vector to get the Enumeration of the Vector’s elements.
  • Invoke the list(Enumeration e) API method of the Collections. It returns an ArrayList containing the elements returned by the specified Enumeration,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;
 
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Vector;
 
public class EnumerationToArrayList {
 
  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_3");
    vector.add("element_4");
    vector.add("element_2");
    vector.add("element_5");
 
    System.out.println("Vector elements : " + vector);

    Enumeration elementsEnumeration = vector.elements();

    // static ArrayList list(Enumeration e) returns an ArrayList containing the elements returned by the specified Enumeration
    ArrayList arrayList = Collections.list(elementsEnumeration);
 
    System.out.println("Arraylist elements : " + arrayList);
 
  }
}

Output:

Vector elements : [element_1, element_3, element_4, element_2, element_5]
Arraylist elements : [element_1, element_3, element_4, element_2, element_5]

 
This was an example of how to create an ArrayList from an Enumeration in Java.

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.
Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Back to top button