Print the content of hashMap object

DrRakha

Display the content of hashMap, check if contains a key, print its size, remove its content and finally check it if empty

Code:

import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Set;

public class ArraysWork {

    public static void main(String[] arr) {

        /* Create object of HashMap */

        HashMap<String, String> hashMap = new HashMap<String, String>();

        /* Add entries to hashMap (Keys,Values) */
        hashMap.put("A", "Apple");
        hashMap.put("B", "Book");
        hashMap.put("C", "Car");
        hashMap.put("D", "Dog");
        hashMap.put("E", "Elephant");
        hashMap.put("F", "Flower");

        // Print the content of the hashMap
        Set<Entry<String,String>> hashSet=hashMap.entrySet();
        for(Entry entry:hashSet ) {

            System.out.println("Key="+entry.getKey()+", Value="+entry.getValue());
        }
        System.out.println("-----------------------------");
        // Print the size of hashMap
         System.out.println("HashMap size="+hashMap.size());

        // Checking and searching
        if(hashMap.containsKey("X")) {
             System.out.println("HashMap has a key X");
        }else{
             System.out.println("HashMap hasn't a key X");
        }

         // Remove the content of the hashMap
         hashMap.clear();

         // Check if the hashMap empty
         if(hashMap.isEmpty())
         {
             System.out.println("The hashMap is empty");
         }


    }
}
 

The output is :

Code:

Key=D, Value=Dog
Key=E, Value=Elephant
Key=F, Value=Flower
Key=A, Value=Apple
Key=B, Value=Book
Key=C, Value=Car
-----------------------------
HashMap size=6
HashMap hasn't a key X
The hashMap is empty

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Print the content of hashMap object

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