Display HashMap elements in Java

Create a HashMap −

HashMap hm = new HashMap();

Add elements to the HashMap that we will be displaying afterward −

hm.put("Maths", new Integer(98)); hm.put("Science", new Integer(90)); hm.put("English", new Integer(97)); hm.put("Physics", new Integer(91));

Now, to display the HashMap elements, use Iterator. The following is an example to display HashMap elements −

Example

 Live Demo

import java.util.*; public class Demo { public static void main(String args[]) { // Create a hash map HashMap hm = new HashMap(); // Put elements to the map hm.put("Maths", new Integer(98)); hm.put("Science", new Integer(90)); hm.put("English", new Integer(97)); hm.put("Physics", new Integer(91)); hm.put("Chemistry", new Integer(93)); // Get a set of the entries Set set = hm.entrySet(); // Get an iterator Iterator i = set.iterator(); // Display elements while(i.hasNext()) { Map.Entry me = (Map.Entry)i.next(); System.out.print(me.getKey() + ": "); System.out.println(me.getValue()); } System.out.println(); System.out.println("Elements: "+hm); } }

Output

Maths: 98 English: 97 Chemistry: 93 Science: 90 Physics: 91 Elements: {Maths=98, English=97, Chemistry=93, Science=90, Physics=91}