Java Exercises

Java Collection, HashMap Exercises: Remove all the mappings from a map

Java Collection, HashMap Exercises: Exercise-4 with Solution

Write a Java program to remove all the mappings from a map.

Sample Solution:-

Java Code:

import java.util.*;  
public class Example4 {  
   public static void main(String args[]) {
  HashMap <Integer,String> hash_map = new HashMap <Integer,String> ();
  hash_map.put(1, "Red");
  hash_map.put(2, "Green");
  hash_map.put(3, "Black");
  hash_map.put(4, "White");
  hash_map.put(5, "Blue");
  // print the map
  System.out.println("The Original linked map: " + hash_map);
  // Removing all the elements from the linked map
  System.out.println("The New map: " + hash_map);

Sample Output:

The Original linked map: {1=Red, 2=Green, 3=Black, 4=White, 5=Blue}    
The New map: {}

Java Code Editor:

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