Friday, 17 October 2014

Java : Collection Framework : ArrayList (Add or Replace element using ListIterator)



Click here to watch in Youtube : https://www.youtube.com/watch?v=RZixLlfJzxs

ArrayListExample.java
import java.util.ArrayList;
import java.util.ListIterator;

/*
 * Example of add(E e) and set(E e) methods of ListIterator
 */
public class ArrayListExample
{

    public static void main( String[] args )
    {
        ArrayList<String> arrayList = new ArrayList<String>();
        arrayList.add("Ram");
        arrayList.add("Dave");
        arrayList.add("Peter");
        arrayList.add("Julia");
        arrayList.add("Akram");

        System.out.println("arrayList : " + arrayList + "\n");

        ListIterator<String> listIterator = arrayList.listIterator();

        /*
         * Using ListIterator move the cursor in forward direction and add
         * element and replace element.
         */

        while( listIterator.hasNext() )
        {

            int indexPosition = listIterator.nextIndex();
            if( indexPosition == 2 )
            {
                /*
                 * Inserts the specified element into the list
                 */
                listIterator.add("Virat");
            }
            String name = listIterator.next();
            if( name.equalsIgnoreCase("Ram") )
            {
                /*
                 * Replaces the last element returned by next() or previous()
                 * with the specified element
                 */
                listIterator.set("Stephan");
            }

        }

        System.out.println("List : " + arrayList + "\n");

    }

}

Output
arrayList : [Ram, Dave, Peter, Julia, Akram]

List : [Stephan, Dave, Virat, Peter, Julia, Akram]


To Download ArrayListDemoListIteratorAddSet Project Click the below link

https://sites.google.com/site/javaee4321/java-collections/ArrayListDemoListIteratorAddSet.zip?attredirects=0&d=1

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
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