squid:S2293 - The diamond operator should be used

caching/src/main/java/com/iluwatar/caching/DbManager.java

@@ -37,7 +37,7 @@ public class DbManager {
    */
   public static void createVirtualDb() {
     useMongoDB = false;
-    virtualDB = new HashMap<String, UserAccount>();
+    virtualDB = new HashMap<>();
   }
 
   /**

caching/src/main/java/com/iluwatar/caching/LruCache.java

@@ -27,7 +27,7 @@ public class LruCache {
   }
 
   int capacity;
-  HashMap<String, Node> cache = new HashMap<String, Node>();
+  HashMap<String, Node> cache = new HashMap<>();
   Node head = null;
   Node end = null;
 
@@ -140,7 +140,7 @@ public class LruCache {
    * Returns cache data in list form.
    */
   public ArrayList<UserAccount> getCacheDataInListForm() {
-    ArrayList<UserAccount> listOfCacheData = new ArrayList<UserAccount>();
+    ArrayList<UserAccount> listOfCacheData = new ArrayList<>();
     Node temp = head;
     while (temp != null) {
       listOfCacheData.add(temp.userAccount);