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 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); } } |
Values in map before removing {Global=800, India=72}
Values in map after removing {}
Program 2:
// 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); } } |
Values in map before removing {Orange=30, Apple=50, Banana=40,
Pomegranate=120, Guava=20}
Values in map after removing {}
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