Java EnumMap equals() method

The equals() method of Java EnumMap class is used to compare two maps for equality. This method basically compares the passed object with this EnumMap object.

Syntax

Parameters

o - the object to be compared for equality with this map.

Returns

This method returns true if the specified object is equal to this map.

Exception

Example 1

import java.util.*;
public class EnumMapEqualsExample1 {
   // create an enum  
    public enum Tutorial {
   CSS, Python, PHP, Java, Javascript
   };
   public static void main(String[] args) {
   //create and populate enum map1 and map2  
      EnumMap<Tutorial, String>  map1 =
              new EnumMap<Tutorial, String> (Tutorial.class);
      EnumMap<Tutorial, String>  map2 =
              new EnumMap<Tutorial, String> (Tutorial.class);

      map1.put(Tutorial.CSS, "1");
      map1.put(Tutorial.Python, "2");
      map1.put(Tutorial.PHP, "3");
      map1.put(Tutorial.Java, "4");
      
      map2.put(Tutorial.CSS, "1");
      map2.put(Tutorial.Python, "2");
      map2.put(Tutorial.PHP, "3");
      map2.put(Tutorial.Java, "4");
      // print map1 and map2  
      System.out.println("Map1:"+map1);
      System.out.println("Map2:"+map2);
      // check equality   
      boolean equal = map1.equals(map2);
      System.out.println("Map1 and Map 2 are equal: "+equal);
      map2.put(Tutorial.Javascript, "5");
      // check equality again  
      equal = map1.equals(map2);
      System.out.println("Map1 and Map 2 are equal: "+equal);
   }
}

Test it Now

Output:

Map1:{CSS=1, Python=2, PHP=3, Java=4}
Map2:{CSS=1, Python=2, PHP=3, Java=4}
Map1 and Map 2 are equal: true
Map1 and Map 2 are equal: false

Example 2

import java.util.*;  
public class EnumMapEqualsExample2 {  
   // create an enum  
   public enum Days {  
   Monday, Tuesday, Wednesday, Thursday  
   };  
   public static void main(String[] args) {  
   //create and populate enum map  
   EnumMap<Days, String> map1= new EnumMap<Days, String>(Days.class);  
   EnumMap<Days, String> map2= new EnumMap<Days, String>(Days.class);  

   map1.put(Days.Monday,"1");  
   map1.put(Days.Tuesday,"2");  
   map1.put(Days.Wednesday,"3");  
   

   map2.put(Days.Monday,"1");  
   map2.put(Days.Tuesday,"2");  
   map2.put(Days.Wednesday,"3");  
   
  // print map1 and map2  
   System.out.println("Map1:"+map1);
   System.out.println("Map2:"+map2);
   // check equality   
   boolean equal = map1.equals(map2);
   System.out.println("Map1 and Map 2 are equal: "+equal);
   map2.put(Days.Thursday,"4");  
   // check equality again  
   equal = map1.equals(map2);
   System.out.println("Map1 and Map 2 are equal: "+equal);
   }    
}  

Test it Now

Output:

Map1:{Monday=1, Tuesday=2, Wednesday=3}
Map2:{Monday=1, Tuesday=2, Wednesday=3}
Map1 and Map 2 are equal: true
Map1 and Map 2 are equal: false

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Java EnumMap Class