TreeMap Collection Example in Java

Presently I am learning collections framework in Java in this sample program I will show you how to use TreeMap. The code is very simple and easy to understand.

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My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.

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Sample Program Output

Program Listing

Main.java

package javaapplication1;

import java.util.*;

/**

 *

 * @author : Mr. Jake R. Pomperada, MAED-IT

 * Date : May 3, 2018

 * Thurdsay

 * Barangay Alijis, Bacolod City Negros Occidental Philippines

 * jakerpomperada@yahoo.com and jakerpomperada@gmail.com

 *

 */

public class Main {

    

    public static void main(String[] args) {

       System.out.println("\n\n");

       System.out.println("TreeMap Collection Example in Java");

       System.out.print("\n");

       

      TreeMap <Integer,String>  set = new TreeMap <Integer,String>();

       

       set.put(1,"Jake R. Pomperada");

       set.put(2,"Ma. Junallie F. Pomperada");

       set.put(3,"Jacob Samuel F. Pomperada");

       set.put(4,"Julianna Rae F. Pomperada");

       set.put(5,"Lydia R. Pomperada");

       set.put(6,"Virgilio V. Pomperada");

       

       

       for (Map.Entry m:set.entrySet()) {

           System.out.println(m.getKey() + " " + m.getValue());

       }

       System.out.print("\n\n");

       System.out.println("End of Program");

       System.out.print("\n\n");

    }

       

}