Java : Collection Framework : LinkedList (Peek methods)

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

LinkedListExample.java

import java.util.LinkedList;

/*
 * Example of peek(),peekFirst() and peekLast() methods
 */
public class LinkedListExample
{

    public static void main( String[] args )
    {
        LinkedList<Integer> linkedList = new LinkedList<Integer>();
        linkedList.add(200);
        linkedList.add(300);
        linkedList.add(10000);
        linkedList.add(5000);
        linkedList.add(2000);

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

        /*
         * Retrieves, but does not remove, the head (first element) of this
         * list.
         */
        Integer value = linkedList.peek();
        System.out.println("peek : " + value);

        /*
         * Retrieves, but does not remove, the first element of this list, or
         * returns null if this list is empty.
         */
        value = linkedList.peekFirst();
        System.out.println("peekFirst : " + value);

        /*
         * Retrieves, but does not remove, the last element of this list, or
         * returns null if this list is empty.
         */
        value = linkedList.peekLast();
        System.out.println("peekLast : " + value);

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

    }
}

Output

linkedList : [200, 300, 10000, 5000, 2000]

peek : 200
peekFirst : 200
peekLast : 2000

linkedList : [200, 300, 10000, 5000, 2000]

To Download LinkedListDemoPeek Project Click the below link

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

See also:

All JavaEE Viedos Playlist

All JavaEE Viedos

Servlets Tutorial

All Design Patterns Links

JDBC Tutorial