Java : Collection Framework : TreeSet (PollFirst)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=HEmsS64fRCc&list=UUhwKlOVR041tngjerWxVccw

TreeSetExample.java

import java.util.TreeSet;

/*
 * Example of pollFirst() method.
 */
public class TreeSetExample
{
    public static void main( String[] args )
    {

        TreeSet<Integer> treeSet = new TreeSet<Integer>();

        treeSet.add(40);
        treeSet.add(20);
        treeSet.add(30);
        treeSet.add(10);
        treeSet.add(50);

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

        /*
         * Retrieves and removes the first (lowest) element, or returns null if
         * this set is empty.
         */

        Integer value = treeSet.pollFirst();
        System.out.println("value : " + value);

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

    }
}

Output

treeSet : [10, 20, 30, 40, 50]

value : 10
treeSet : [20, 30, 40, 50]

To Download TreeSetDemoPollFirst Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/TreeSetDemoPollFirst.zip?attredirects=0&d=1

See also:

All JavaEE Viedos Playlist

All JavaEE Viedos

Servlets Tutorial

All Design Patterns Links

JDBC Tutorial