Question

Create a class Superheros

member: Map heroMap //key = name, value = weapon (or get creative)

member: Set< String> powerSet //superpowers

*** initialize your map & set – preferably in constructor ***

/* One liner to ‘put’ the key, value pair you’re passing in.. */

Method: void putEntryInMap (String key, String value) {}

/* Another 1 liner – well maybe 2. (1) ‘get’ the value from the map with the key (2) capture that value and return it (to your testHarness) */

Method: String getEntryFromMap (String key) {}

/* Another 1/2 liner (1) ‘remove’ the value from the map with the key (2) check if you have actually removed your value from your map by printing the results of heroMap.hasKey(key) */

Method: void removeEntryFromMap (String key){}

/* For all the marbles… you need to: Get the keyset from your map. This will give you a set of all the keys in the map. With your keyset, iterate over each element in your set & in the loop ‘get’ the value for that key from your map & print it. (Note you will need to create a local Set variable in this method). */

Method void displayAllMapEntries(){}

/* add an element to your set */

Method void addToSet(String name){}

/* remove an element from your set */

Method void removeFromSet(String name){}

/* iterate over the elements in your set and print each */

Method void printSet(){}

In your testHarness:

- create a Superhero instance ( make sure your map & set are initialized in your Superhero ctor ) - invoke one of your Superhero methods to ‘put’ a few entries ( 4 or more ) in your map.

- invoke one of your Superhero methods to ‘display’ your cat entries - invoke one of your Superhero methods ‘get’ an entry

- capture the value returned in your harness & print it out. - invoke one of your Superhero methods ‘remove’ an entry - invoke one of your Superhero methods to ‘display’ each entry (do not just print the map)

- invoke one of your Superhero methods to ‘add’ a few entries into your set

Make sure you add a couple duplicate names!

- invoke one of your Superhero methods to ‘display’ your set (do not just print the set) - invoke one of your Superhero methods to ‘remove’ an entry from your set - invoke one of your Superhero methods to ‘display’ your updated set (do not just print the set)

Answer 1

import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;

public class Superheros {
        private HashMap<String,String> heroMap;
        private HashSet<String> powerSet;
        public Superheros() {
                super();
                this.heroMap=new HashMap<>();
                this.powerSet=new HashSet<>();
        }
        
        public void putEntryInMap(String key,String value) {
                heroMap.put(key, value);
        }
        
        public String getEntryFromMap(String key){
                return heroMap.get(key);
        }
        
        public void removeEntryFromMap(String key) {
                heroMap.remove(key);
        }
        
        public void displayAllMapEntries() {
                Set<String> keySet=heroMap.keySet();
                for (String hero : keySet) {
                        String weapon=heroMap.get(hero);
                        System.out.println(hero+" uses "+weapon+" weapon");
                }
        }
        
        public void addToSet(String name) {
                powerSet.add(name);
        }
        
        public void removeFromSet(String name) {
                powerSet.remove(name);
        }
        
        public void printSet() {
                int i=0;
                for (String power : powerSet) {
                        System.out.println(++i+"th Superpower of Avengers is "+power);
                }
        }
}

class TestHarness{
        public static void main(String[] args) {
                Superheros superheros=new Superheros();
                superheros.putEntryInMap("IronMan", "MK42");
                superheros.putEntryInMap("CaptainAmerica", "Shield");
                superheros.putEntryInMap("Thor", "Hammer");
                superheros.putEntryInMap("Antman", "PymParticle");
                superheros.putEntryInMap("DrStrange", "TimeStone");
                superheros.displayAllMapEntries();
                String entry="DrStrange";
                System.out.println(entry+" uses "+superheros.getEntryFromMap(entry));
                System.out.println("Updated Map of super heroes and their weapons:");
                superheros.removeEntryFromMap(entry);
                superheros.displayAllMapEntries();
                superheros.addToSet("Fly");
                superheros.addToSet("Summon Thunder");
                superheros.addToSet("Fight");
                superheros.addToSet("Web Shooter");
                superheros.addToSet("Stamina");
                superheros.addToSet("Jump Through Dimensions");
                superheros.addToSet("Fly");
                superheros.addToSet("Fly");
                superheros.addToSet("Web Shooter");
                superheros.printSet();
                superheros.removeFromSet("Stamina");
                System.out.println("Updated Set of super powers:");
                superheros.printSet();
                
        }
}