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Java EnumMap equals() Method with Example

EnumMap Class equals() method: Here, we are going to learn about the equals() method of EnumMap Class with its syntax and example.
Submitted by Preeti Jain, on February 10, 2020

EnumMap Class equals() method

• equals() method is available in java.util package.
• equals() method is used to check whether this map compares with the given object is the same or not.
• equals() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• equals() method does not throw an exception at the time of checking the equality of objects.

Syntax:

    public boolean equals(Object obj);

Parameter(s):

• Object obj – represents the object to be compared with this enum map.

Return value:

The return type of this method is boolean, it returns true when both the compared objects are same otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean equals(Object obj) method of EnumMap

import java.util.*;

public class EqualsOfEnumMap {
    public enum Colors {
        RED,
        BLUE,
        PINK,
        YELLOW
    };

    public static void main(String[] args) {
        // We are creating two EnumMap object
        EnumMap < Colors, String > em =
            new EnumMap < Colors, String > (Colors.class);

        EnumMap < Colors, String > comp_em =
            new EnumMap < Colors, String > (Colors.class);

        // By using put() method is to
        // add the linked values in an
        // EnumMap (em)
        em.put(Colors.RED, "1");
        em.put(Colors.BLUE, "2");
        em.put(Colors.PINK, "3");
        em.put(Colors.YELLOW, "4");

        // By using put() method is to
        // add the linked values in an
        // EnumMap (comp_em)
        comp_em.put(Colors.RED, "5");
        comp_em.put(Colors.BLUE, "6");
        comp_em.put(Colors.PINK, "7");
        comp_em.put(Colors.YELLOW, "4");


        // Display Both EnumMap
        System.out.println("EnumMap (em) :" + em);
        System.out.println("EnumMap (comp_em):" + comp_em);

        // By using equals() method isto
        // whether this EnumMap (em) is same
        // as the given or compared EnumMap (comp_em)

        boolean status = em.equals(comp_em);

        // Display status of EnumMap
        System.out.println("em.equals(comp_em): " + status);
    }
}

Output

EnumMap (em) :{RED=1, BLUE=2, PINK=3, YELLOW=4}
EnumMap (comp_em):{RED=5, BLUE=6, PINK=7, YELLOW=4}
em.equals(comp_em): false