Tuesday, 11 November 2014

Java : Collection Framework : Queue (How to add elements)


Click here to watch in Youtube : https://www.youtube.com/watch?v=1cAUMT4vZew

QueueExample.java
import java.util.LinkedList;
import java.util.Queue;

/*
 *  Example of add(E e) and offer(E e) methods.
 */
public class QueueExample
{

    public static void main( String[] args )
    {
        Queue<Integer> queue = new LinkedList<Integer>();
        queue.add(200);
        queue.add(300);
        queue.add(400);
        queue.add(500);

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

        /*
         * Inserts the specified element into this queue if it is possible to do
         * so immediately without violating capacity restrictions, returning
         * true upon success and throwing an IllegalStateException if no space
         * is currently available.
         */
        boolean isAdded = queue.add(600);

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

        /*
         * Inserts the specified element into this queue if it is possible to do
         * so immediately without violating capacity restrictions. When using a
         * capacity-restricted queue, this method is generally preferable to
         * add(E), which can fail to insert an element only by throwing an
         * exception.
         */
        isAdded = queue.offer(700);
        System.out.println("isAdded : " + isAdded);
        System.out.println("queue : " + queue + "\n");

    }
}

Output
queue : [200, 300, 400, 500]

isAdded : true
queue : [200, 300, 400, 500, 600]

isAdded : true
queue : [200, 300, 400, 500, 600, 700]

To Download QueueDemoAddOffer Project Click the below link

https://sites.google.com/site/javaee4321/java-collections/QueueDemoAddOffer.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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