Dictionary_ClassWork

import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;

public class Rechnik {
    public static void main(String[] args) {
        Dictionary<Integer, String> MyDictionary = new Hashtable<>();

        MyDictionary.put(1, "Apple");
        MyDictionary.put(2, "Bannana");
        MyDictionary.put(3, "Orange");
        MyDictionary.put(4, "Avocado");

        /*
        MyDictionary.put(AP, "Apple");
        MyDictionary.put(BA, "Bannana");
        MyDictionary.put(OR, "Orange");
        MyDictionary.put(AV, "Avocado");
        */


        System.out.println("\nSize of my dict: " + MyDictionary.size());

        System.out.println("Value at key = 1: " + MyDictionary.get(1));
        System.out.println("Value at key = 2: " + MyDictionary.get(2));
        System.out.println("Value at key = 3: " + MyDictionary.get(3));
        System.out.println("Value at key = 4: " + MyDictionary.get(4));

        System.out.println("Before removing elements" + MyDictionary);

        System.out.println("By for-cycle: ");
        for (int i = 1; i <= MyDictionary.size(); i++) {
            System.out.println("MyDict element: " + MyDictionary.get(i));
        }

        System.out.println("By enumeration-keys: ");
        for (Enumeration items = MyDictionary.keys(); items.hasMoreElements();) {
            System.out.println("Key in Dictionary: " + items.nextElement());
        }

        System.out.println("By enumeration-values: ");
        for (Enumeration items = MyDictionary.elements(); items.hasMoreElements();) {
            System.out.println("Value in Dictionary: " + items.nextElement());
        }

        System.out.println("\nIs my dictionary empty? : " + MyDictionary.isEmpty() + "\n");

        MyDictionary.remove(1);
        MyDictionary.remove(2);

        MyDictionary.remove("BA");
        MyDictionary.remove("AV");

        System.out.println("Cheking if the removed value exists(By Integer key): " + MyDictionary.get(1));
        System.out.println("Cheking if the removed value exists(By Integer key): " + MyDictionary.get(2));

        System.out.println("Cheking if the removed value exists(By String key): " + MyDictionary.get("BA"));
        System.out.println("Cheking if the removed value exists(By String key): " + MyDictionary.get("AV"));
        System.out.println("Cheking if the removed value exists(By String key): " + MyDictionary.get("AP"));


        System.out.println("After removing elements: " + MyDictionary);

        System.out.println("\nSize of my dict: " + MyDictionary.size());
    }
}