import java.util.*;

public class JavaMapAndDictionary {
    public static void main(String[] args) {
        // Map Example
        double[] mapGPA = new double[] { 4.0, 3.0, 2.0, 1.0, 0.0 };
        char[] mapLetter = new char[] { 'A', 'B', 'C', 'D', 'F' };
        Map<Character, Double> map = new HashMap<Character, Double>();

        for (int i = 0; i < mapGPA.length; i++) {
            map.put(mapLetter[i], mapGPA[i]); // Insert key/value into map
        }

        for (Character key : map.keySet()) {
            System.out.println(key + " " + map.get(key));
        }

        // END: Map Example
        System.out.println();
        // Dictionary Example
        double[] dictGPA = new double[] { 4.0, 3.0, 2.0, 1.0, 0.0 };
        char[] dictLetter = new char[] { 'A', 'B', 'C', 'D', 'F' };
        Dictionary<Character, Double> dictionary = new Hashtable<Character, Double>();

        for (int i = 0; i < dictGPA.length; i++) {
            dictionary.put(dictLetter[i], dictGPA[i]); // Insert key/value into map
        }

        for (Enumeration<Character> keys = dictionary.keys(); keys.hasMoreElements(); ) {
            char keyVal = keys.nextElement();
            System.out.println(keyVal + " " + dictionary.get(keyVal));
        }
        // END: Dictionary Example
    }
}