Convert Array to Vector in Java Example

This example shows how to convert an array to a Vector object in Java. This example also shows how to convert an array to a vector object using the asList method, addAll method, and Apache Common library.

How to convert an array to a Vector object in Java?

There are several ways using which we can convert an array to a vector object in Java as given below.

1. Using the addAll method of the Collections class

The Collections addAll method adds all the specified elements to the specified collection object.

1	public static <T> boolean addAll(Collection<? super T> c, T... elements)

We can use this method to add all array elements to the vector object as given below.

import java.util.Collections;

import java.util.Vector;

public class ConvertArrayToVector {

public static void main(String[] args) {

String[] strColors = {"white", "orange", "black"};

//create new vector object of the same type

Vector<String> vColors = new Vector<String>();

* Use the addAll method of the Collections to add

* all array elements to the vector object

Collections.addAll(vColors, strColors);

System.out.println("Vector contains: " + vColors);

}

Output

1	Vector contains: [white, orange, black]

2. Using the asList method of the Arrays class

The Vector class provides a constructor that accepts a collection object.

1	public Vector(Collection<? extends E> collection)

This constructor creates a new vector object containing all the elements of the specified collection object. We will convert the array to a List object first to utilize this constructor using the asList method of the Arrays class.

The below given example shows how to convert a String array to a vector object using this approach.

String[] strColors = {"white", "orange", "black"};

//convert array to list

List<String> list = Arrays.asList(strColors);

//create new vector from the list elements

Vector<String> vColors = new Vector<String>( list );

System.out.println("Vector contains: " + vColors);

Output

1	Vector contains: [white, orange, black]

3. Using the Apache Commons library

If you are using the Apache Commons library, you can use the addAll method of the CollectionUtils class to add array elements to a vector object as given below.