EnumMap clear() Method in Java with Examples

Last Updated : 11 Jul, 2018

The Java.util.EnumMap.clear() method in Java is used to remove all the mappings from the map. The method does not delete the map instead it just clears the map of the mappings. Syntax:

enum_map.clear()

Parameters: This method does not accept any argument. Return Values: This method does not return any value. Below programs illustrate the working of Java.util.EnumMap.clear() method: Program 1:

Java

// Java program to demonstrate clear() method
import java.util.*;

// An enum of geeksforgeeks ranking across
// Worldwide & in India is created
public enum gfg {
    Global,
    India
}
;

class Enum_map {
    public static void main(String[] args)
    {

        EnumMap<gfg, Integer> mp = new EnumMap<gfg, Integer>(gfg.class);

        // Values are associated in mp
        mp.put(gfg.Global, 800);
        mp.put(gfg.India, 72);

        // Values in mp before removing
        System.out.println("Values in map before removing " + mp);

        // Removing the values from mp
        mp.clear();

        // Values in mp after removing
        System.out.println("Values in map after removing " + mp);
    }
}

Output:

Values in map before removing {Global=800, India=72}
Values in map after removing {}

Program 2:

Java

// Java program to demonstrate clear() method
import java.util.*;

// An enum of fruits price is created
public enum Price_of_Fruits {
    Orange,
    Apple,
    Banana,
    Pomegranate,
    Guava

}
;

class Enum_map {
    public static void main(String[] args)
    {

        EnumMap<Price_of_Fruits, Integer> mp = new EnumMap<Price_of_Fruits, Integer>(Price_of_Fruits.class);

        // Values are associated in mp
        mp.put(Price_of_Fruits.Orange, 30);
        mp.put(Price_of_Fruits.Apple, 50);
        mp.put(Price_of_Fruits.Banana, 40);
        mp.put(Price_of_Fruits.Pomegranate, 120);
        mp.put(Price_of_Fruits.Guava, 20);

        // Values in mp before removing
        System.out.println("Values in map before removing " + mp);

        // Removing the values from mp
        mp.clear();

        // Values in mp after removing
        System.out.println("Values in map after removing " + mp);
    }
}

Output:

Values in map before removing {Orange=30, Apple=50, Banana=40, 
                                    Pomegranate=120, Guava=20}
Values in map after removing {}