Array to Collection

In this example we are converting values of an array into collection.

Array to Collection

In this example we are converting values of an array into collection.

List interface is a member of the Java Collection Framework and extends Collection interface. List interface is an ordered collection which follows insertion order, typically allow duplicate elements. The List interface provides a special iterator, called ListIterator for insertion, replacement and bi-directional access.
The Arrays class contains various methods for manipulating arrays (e.g. sorting and searching etc.) and extends the Object class. The Iterator class allows access to the elements of a collection.

Methods used:
hasNext(): This method is used to get more elements. If the element at the next position is found then returns true otherwise throws an exception.

next(): This method returns the next element in the iteration.

asList(Object[] a): This method acts as a bridge between array and collection. This method converts array into Arrays by internally using Colletion.toArray() method .

The code of the program is given below:


import java.util.Arrays;

import java.util.List;

import java.util.Iterator;

 

public class ArraysToCollection{

  public static void main(String[] args){

  String[] array = {"Java", "Struts", "JSP", "J2EE"};

  List list = Arrays.asList(array);

  Iterator iterator = list.iterator();

  System.out.println("\nThe values into Array");

  while (iterator.hasNext()){

   System.out.println((String) iterator.next());

 }

 }

}

The output of the program is given below:

C:\rajesh\kodejava>javac ArraysToCollection.java

C:\rajesh\kodejava>java ArraysToCollection

The values into Array
Java
Struts
JSP
J2EE

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Array to Collection

Array to Collection

Array to Collection

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