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Java AbstractMap hashCode() Method
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Java AbstractMap equals() Method

Last Updated : 20 Jan, 2025
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The equals() method of the Java AbstractMap class is used to check equality between two maps. It compares the key-value pair in the current map with the key-value pair of the specified map.

Syntax of AbstarctMap equals() Method

public boolean equals(Object o)

  • Parameter: The Object to be compared with the current map.
  • Return Type: Return "true" if the specified object is equal to the current map, otherwise return "false".

Example: This example demonstrates how the equals() method checks for equality between different HashMap instances based on their key-value mapping.

Java 
// Java code to demonstrate the working of equals() import java.util.AbstractMap; import java.util.HashMap; import java.util.Map;  public class Geeks {     public static void main(String[] args)     {             // Creating three HashMap instances         Map<String, Integer> hm1 = new HashMap<>();         hm1.put("Geek1", 1);         hm1.put("Geek2", 2);         hm1.put("Geek3", 3);          Map<String, Integer> hm2 = new HashMap<>();         hm2.put("Geek3", 3);         hm2.put("Geek2", 2);         hm2.put("Geek1", 1);          Map<String, Integer> hm3 = new HashMap<>();         hm3.put("Geek1", 1);         hm3.put("Geek2", 2);         hm3.put("Geek4", 4);          System.out.println("First HashMap: " + hm1);         System.out.println("Second HashMap: " + hm2);         System.out.println("Third HashMap: " + hm3);                // Checking equality between the maps         System.out.println("Is hm1 equal to hm2? " + hm1.equals(hm2));         System.out.println("Is hm1 equal to hm3? " + hm1.equals(hm3));       } }

Output
First HashMap: {Geek3=3, Geek2=2, Geek1=1} Second HashMap: {Geek3=3, Geek2=2, Geek1=1} Third HashMap: {Geek4=4, Geek2=2, Geek1=1} Is hm1 equal to hm2? true Is hm1 equal to hm3? false

Next Article
Java AbstractMap hashCode() Method
author
chinmoy lenka
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Article Tags :
  • Misc
  • Java
  • Java-Collections
  • Java - util package
  • Java-HashMap
  • Java-AbstractMap
Practice Tags :
  • Java
  • Java-Collections
  • Misc

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