Title 17 in class

import java.util.HashMap;
import java.util.Map;

public class hashm {
    public static void main(String[] args) {
        //  Dictionary<Integer, String> MyDictionary    = new Hashtable<Integer, String>(16);   // HASH-TABLE /DICTIONARY/
        HashMap<String, Double> MyDictionary = new HashMap<>(10); // HASH-MAP /DICTIONARY/
        // key : value

        MyDictionary.put("Pesho",  3.00);
        MyDictionary.put("Gosho",  4.50);
        MyDictionary.put("Nakov",  5.50);
        MyDictionary.put("Vesko",  3.50);
        MyDictionary.put("Tsanev", 4.50);
        MyDictionary.put("Nerdy",  6.00);


        System.out.println("HashMap Size : " + MyDictionary.size());
        //System.out.println("HashMap Initial Capacity : " + MyDictionary);

        // GET
        Double tsanevMark = MyDictionary.get("Tsanev");
        System.out.printf("Tsanev's mark: %.2f %n", tsanevMark);
        // Formatted print (output will be the same as above)
        //System.out.println(MessageFormat.format("Tsanev''s mark: {0,number,#.##}", tsanevMark));// Same as above


        //REMOVE
        MyDictionary.remove("Tsanev");
        System.out.println("Tsanev removed.");



        // CONTAINS KEY -
        System.out.printf("Is Tsanev in the hash table: %b %n", MyDictionary.containsKey("Tsanev"));

        // CONTAINS VALUE
        System.out.printf("Is Tsanev in the hash table: %b %n", MyDictionary.containsValue(6.00));



        MyDictionary.put("Nerdy", 3.25);
        System.out.println("Nerdy's mark changed.");


        System.out.println("Students and marks (чрез for-each)");

        // FOR-EACH-CYCLE ::::::::::::::::: HASH-MAP
        // PRINT KEYS AND VALUES BY ENTRYSET() METHOD..................................
        for (Map.Entry<String, Double> items : MyDictionary.entrySet()) {

            System.out.printf("Student %s has %.2f%n", items.getKey(), items.getValue());
        }
        System.out.println("Students and marks (чрез println) : " + MyDictionary);


        /*
        // FOR-EACH-CYCLE ::::::::::::::::: HASH-TABLE
        // PRINT KEYS BY ENUMERATOR USING .KEYS() METHOD...................................................
        // IS NOT IMPLEMENTED IN HASH-MAP

        System.out.println("By Enumeration - KEYS :");
        for (Enumeration<Integer> items = MyDictionary.keys(); items.hasMoreElements();)
        {
            System.out.println("KEYS in Dictionary : " + items.nextElement());
        }
        System.out.println();
        */

        System.out.printf("There are %d students.%n", MyDictionary.size());
        MyDictionary.clear();
        System.out.println("Students hashmap cleared.");
        System.out.printf("Is hash table empty: %b%n", MyDictionary.isEmpty());



        /*
        // ////////////////////////////////////////////////////////////////////////////////////////

        System.out.println( "MyDictionary entrySet : " + MyDictionary.entrySet() );

        System.out.println( "MyDictionary hashCode : " + MyDictionary.hashCode() );

        System.out.println( "MyDictionary getClass : " + MyDictionary.getClass() );
        */

    }
    }