Check two HashMap for equality in Java

To check whether two HashMap are equal or not, use the equals() method.

Let us first create the first HashMap −

// Create hash map 1
HashMap hm1 = new HashMap();
hm1.put("Shirts", new Integer(700));
hm1.put("Trousers", new Integer(600));
hm1.put("Jeans", new Integer(1200));
hm1.put("Android TV", new Integer(450));
hm1.put("Air Purifiers", new Integer(300));
hm1.put("Food Processors", new Integer(950));

Let us now create the second HashMap −

HashMap hm2 = new HashMap();
hm2.put("Shirts", new Integer(700));
hm2.put("Trousers", new Integer(600));
hm2.put("Jeans", new Integer(1200));
hm2.put("Android TV", new Integer(450));
hm2.put("Air Purifiers", new Integer(300));
hm2.put("Food Processors", new Integer(950));

To check whether both the HashMap are equal or not, use the equals() method like this −

hm1.equals(hm2)

The following is an example to check two HashMap for equality −

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      // Create hash map 1
      HashMap hm1 = new HashMap();
      hm1.put("Shirts", new Integer(700));
      hm1.put("Trousers", new Integer(600));
      hm1.put("Jeans", new Integer(1200));
      hm1.put("Android TV", new Integer(450));
      hm1.put("Air Purifiers", new Integer(300));
      hm1.put("Food Processors", new Integer(950));
      System.out.println("Map 1 = "+hm1);
      // Create hash map 2
      HashMap hm2 = new HashMap();
      hm2.put("Shirts", new Integer(700));
      hm2.put("Trousers", new Integer(600));
      hm2.put("Jeans", new Integer(1200));
      hm2.put("Android TV", new Integer(450));
      hm2.put("Air Purifiers", new Integer(300));
      hm2.put("Food Processors", new Integer(950));
      System.out.println("Map 2 = "+hm2);
      System.out.println("Map 1 is equal to Map 2? "+hm1.equals(hm2));
   }
}

Output

Map 1 = {Shirts=700, Food Processors=950, Air Purifiers=300, Jeans=1200, Android TV=450, Trousers=600}
Map 2 = {Shirts=700, Food Processors=950, Air Purifiers=300, Jeans=1200, Android TV=450, Trousers=600}
Map 1 is equal to Map 2? true