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());	      
   }
}

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());	
  }
}

Output:

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

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Java EnumMap hashCode() method

Syntax

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Exception

Example 1

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Java EnumMap hashCode() method

Syntax

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Example 1

Example 2

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