Retrieve a set of Map.Entry elements from a HashMap in Java

Create a HashMap and add elements to it −

HashMap hm = new HashMap();
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
hm.put("Backpack", new Integer(1200));

The following is the code snippet to retrieve a set of Map.Entry elements −

Set s = hm.entrySet();
Iterator iter = s.iterator();
System.out.println("\nKey\tValue");
while (iter.hasNext()) {
   Map.Entry e = (Map.Entry) iter.next();
   System.out.println(e.getKey() + " " + e.getValue());
}

The following is an example to retrieve a set of Map.Entry elements from a HashMap −

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      // Create hash map
      HashMap hm = new HashMap();
      hm.put("Wallet", new Integer(700));
      hm.put("Belt", new Integer(600));
      hm.put("Backpack", new Integer(1200));
      System.out.println("Map = "+hm);
      Set s = hm.entrySet();
      Iterator iter = s.iterator();
      System.out.println("\nKey\tValue");
      while (iter.hasNext()) {
         Map.Entry e = (Map.Entry) iter.next();
         System.out.println(e.getKey() + " " + e.getValue());
      }
   }
}

Output

Map = {Backpack=1200, Belt=600, Wallet=700}

KeyValue
Backpack 1200
Belt 600
Wallet 700

Samual Sam

Published on 16-Jan-2019 07:10:02