Java.util.EnumMap.equals() Method

Description

The java.util.EnumMap.equals(Object o) method compares the specified object with this map for equality.Both objects must be maps.

Declaration

Following is the declaration for java.util.EnumMap.equals() method

public boolean equals(Object o)

Parameters

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

Return Value

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

Exception

• NA

Example

The following example shows the usage of java.util.EnumMap.equals() method.

package com.tutorialspoint;

import java.util.*;

public class EnumMapDemo {

   // create an enum
   public enum Numbers {

      ONE, TWO, THREE, FOUR, FIVE
   };

   public static void main(String[] args) {
      EnumMap<Numbers, String> map1 =
              new EnumMap<Numbers, String>(Numbers.class);

      EnumMap<Numbers, String> map2 =
              new EnumMap<Numbers, String>(Numbers.class);

      // associate values in map1
      map1.put(Numbers.ONE, "1");
      map1.put(Numbers.TWO, "2");
      map1.put(Numbers.THREE, "3");
      map1.put(Numbers.FOUR, "4");

      // associate values in map2
      map2.put(Numbers.ONE, "1");
      map2.put(Numbers.TWO, "2");
      map2.put(Numbers.THREE, "3");
      map2.put(Numbers.FOUR, "4");

      // print the maps
      System.out.println("map1:" + map1);
      System.out.println("map2:" + map2);

      // check for equality between maps
      boolean equal = map1.equals(map2);

      // print the result
      System.out.println("Map1 and map 2 are equal:" + equal);

      // add one more value in map2
      map2.put(Numbers.FIVE, "5");

      // check for equality between maps
      equal = map1.equals(map2);

      // print the result
      System.out.println("Map1 and map 2 are equal:" + equal);

   }
}

Let us compile and run the above program, this will produce the following result:

map1:{ONE=1, TWO=2, THREE=3, FOUR=4}
map2:{ONE=1, TWO=2, THREE=3, FOUR=4}
Map1 and map 2 are equal:true
Map1 and map 2 are equal:false