src/main/java/org/zipcoder/store/Cart.java

@@ -12,4 +12,20 @@ public class Cart {
     public long getId(){
         return this.id;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Cart)) return false;
+        Cart cart = (Cart) o;
+        return getId() == cart.getId();
+    }
+
+    @Override
+    public int hashCode() {
+
+        return Objects.hash(getId());
+    }
+
+
 }

src/main/java/org/zipcoder/store/ListMap.java

@@ -9,40 +9,60 @@ public class ListMap implements MyMap {
 
     @Override
     public int size() {
-        return -1;
+        return entries.size();
     }
 
     @Override
-    public boolean isEmptry() {
-        return false;
-    }
+    public boolean isEmptry() { return entries.isEmpty(); }
 
     @Override
     public Cart get(User key) {
         // find the cart associate with the key
-        return null;
+        Cart rightCart = null;
+        for (Entry entry : entries) {
+            if (entry.getKey() == key) {
+                rightCart = entry.getValue();
+            }
+        }
+        return rightCart;
     }
 
     @Override
     public void put(User key, Cart value) {
         // add the key, value entry to the entries list
+        Entry entry = new Entry(key, value);
+        entries.add(entry);
     }
 
 
     @Override
     public List<User> getKeys() {
         // get all the keys in the map
-        return null;
+        List<User> keys = new ArrayList<>();
+        entries.forEach(entry -> keys.add(entry.getKey()));
+//        for (Entry entry : entries) {
+//            keys.add(entry.getKey());
+//        }
+        return keys;
     }
 
     @Override
     public List<Cart> getValues() {
         // get all the values in the map
-        return null;
+        List<Cart> values = new ArrayList<>();
+        entries.forEach(entry -> values.add(entry.getValue()));
+        return values;
     }
 
     @Override
     public Cart remove(User key) {
-        return null;
+        Cart rightValue = null;
+        for (Entry entry : entries) {
+            if (entry.getKey() == key) {
+                rightValue = entry.getValue();
+                entries.remove(entry);
+            }
+        }
+        return rightValue;
     }
 }

src/main/java/org/zipcoder/store/MyHashMap.java

@@ -8,10 +8,12 @@ public class MyHashMap implements MyMap{
 
     // instance field that can only be set once. It is different for every Object
     private final List<Entry>[] entries;
+    private int size;
 
     public MyHashMap(){
+    // creates an array of length 15
         entries = new List[BUCKET_SIZE];
-
+    // populates array with 15 ArrayLists
         for(int i = 0; i < BUCKET_SIZE; i++) {
             entries[i] = new ArrayList<>();
         }
@@ -19,37 +21,66 @@ public class MyHashMap implements MyMap{
 
     @Override
     public int size() {
-        return -1;
+        for (int i = 0; i < entries.length; i++) {
+            size += entries[i].size();
+        }
+        return size;
     }
 
     @Override
     public boolean isEmptry() {
-        return false;
+        return size == 0;
     }
 
     @Override
     public Cart get(User key) {
-        return null;
+        Cart rightCart = null;
+        for (List<Entry> e : entries) {
+            for (Entry entry : e) {
+                if(entry.getKey().equals(key) || entry.getKey().getName().equals(key.getName())) {
+                    rightCart = entry.getValue();
+                }
+            }
+        }
+        return rightCart;
     }
 
     @Override
     public void put(User key, Cart value) {
-
+        Entry entry = new Entry(key, value);
+        entries[this.size++].add(entry);
+        //this.size++;
     }
 
     @Override
     public List<User> getKeys() {
-        return null;
+        List<User> keyList = new ArrayList<>();
+        List<List<Entry>> lambdaList = new ArrayList<>(Arrays.asList(entries));
+
+        lambdaList.forEach(entries1 -> entries1.forEach(entry -> keyList.add(entry.getKey())));
+        return keyList;
     }
 
     @Override
     public List<Cart> getValues() {
-        return null;
+        List<Cart> valueList = new ArrayList<>();
+        List<List<Entry>> lambdaList = new ArrayList<>(Arrays.asList(entries));
+
+        lambdaList.forEach(entries1 -> entries1.forEach(entry -> valueList.add(entry.getValue())));
+        return valueList;
     }
 
     @Override
     public Cart remove(User key) {
-        return null;
+        Cart rightCart = null;
+        for (List<Entry> list : entries) {
+            for (Entry entry : list) {
+                if (entry.getKey() == key) {
+                    rightCart = entry.getValue();
+                }
+            }
+        }
+        return rightCart;
     }
 
     private int bucketIndex(User key){

src/main/java/org/zipcoder/store/User.java

@@ -37,4 +37,21 @@ public class User {
     public void setName(String name) {
         this.name = name;
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        boolean isEqual = false;
+        if (this.getClass() == obj.getClass()) {
+            //obj = new User();
+            if (this.getId() == ((User) obj).getId() && this.getName() == ((User) obj).getName()) {
+                isEqual = true;
+            }
+        }
+        return isEqual;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.getId(), this.getName());
+    }
 }