Java EnumMap hashCode() method

The hashCode() method of Java EnumMap class is used to get the hashcode value of the EnumMap.This method returns an integer whose value is the sum of the hash codes of each entry in the map.

Syntax

Parameters

Returns

This method returns the hash code value for this map.

Exception

Example 1

import java.util.*;  
public class EnumMapHashCodeExample1 {  
   // create an enum  
  public enum Tutorial{
  CSS, Python, PHP, Java, Javascript
  }; 
  public static void main(String[] args) {
  //create and populate enum
  EnumMap<Tutorial,String>  map = 
	            new EnumMap<Tutorial,String> (Tutorial.class); 

  map.put(Tutorial.CSS, "1");
  map.put(Tutorial.Python, "2");
  map.put(Tutorial.PHP,"3");
  map.put(Tutorial.Java, "4");
  //print the hash code value of the map
  System.out.println("Hash code value of the map: "+map.hashCode()); 	
  //clear the map
  map.clear();	      
  // print the hash code value of the map again 
   System.out.println("Hash code value after clearing the map: "+map.hashCode());	      
   }
}

Test it Now

Output:

Hash code value of  the map: -450357866
Hash code value after clearing the map: 0

Example 2

import java.util.*;  
public class EnumMapHashCodeExample2 {      
  // create an enum  
  public enum Days {  
  Monday, Tuesday, Wednesday, Thursday  
  };  
  public static void main(String[] args) {  
  //create and populate enum map  
  EnumMap<Days, String> map= new EnumMap<Days, String>(Days.class);  
	   
  map.put(Days.Monday,"1");  
  map.put(Days.Tuesday,"2");  
  map.put(Days.Wednesday,"3");     
  //print hash code value of the map
  System.out.println("Hash code value of the map: "+map.hashCode()); 	
  //clear the map
  map.clear();	      
  // print hash code value of the map again 
  System.out.println("Hash code value after clearing the map: "+map.hashCode());	
  }
}

Test it Now

Output:

Hash code value of the map: -1315471824
Hash code value after clearing the map: 0

Next TopicJava EnumMap

← prev next →

Help Others, Please Share

Javatpoint Services

JavaTpoint offers too many high quality services. Mail us on [email protected], to get more information about given services.

Website Designing
Website Development
Java Development
PHP Development
WordPress
Graphic Designing
Logo
Digital Marketing
On Page and Off Page SEO
PPC
Content Development
Corporate Training
Classroom and Online Training
Data Entry

Training For College Campus

JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Please mail your requirement at [email protected].
Duration: 1 week to 2 week

^{Like/Subscribe us for latest updates or newsletter}

Java EnumMap Class