Home » Java programming language

Java EnumMap entrySet() Method with Example

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

EnumMap Class entrySet() method

• entrySet() method is available in java.util package.
• entrySet() method is used to get a set view of the mappings that exist in this enum map.
• entrySet() 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.
• entrySet() method does not throw an exception at the time of returning mappings in the set view.

Syntax:

    public Set entrySet();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is Set, it returns mapping of this enum map is to be viewed in a set.

Example:

// Java program to demonstrate the example 
// of Set entrySet() method of EnumMap

import java.util.*;

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

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

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

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

        // By using entrySet() method isto
        // represent the EnumMap to be viewed
        // in a Set object

        Set s = em.entrySet();

        // Display set view of EnumMap
        System.out.println("em.entrySet(): " + s);
    }
}

Output

EnumMap :{RED=1, BLUE=2, PINK=3, YELLOW=4}
em.entrySet(): [RED=1, BLUE=2, PINK=3, YELLOW=4]