diff --git a/dao/src/main/java/com/iluwatar/dao/App.java b/dao/src/main/java/com/iluwatar/dao/App.java
index c8dd5629d..78406208a 100644
--- a/dao/src/main/java/com/iluwatar/dao/App.java
+++ b/dao/src/main/java/com/iluwatar/dao/App.java
@@ -128,10 +128,6 @@ public class App {
     final Customer customer1 = new Customer(1, "Adam", "Adamson");
     final Customer customer2 = new Customer(2, "Bob", "Bobson");
     final Customer customer3 = new Customer(3, "Carl", "Carlson");
-    final List<Customer> customers = new ArrayList<>();
-    customers.add(customer1);
-    customers.add(customer2);
-    customers.add(customer3);
-    return customers;
+    return List.of(customer1, customer2, customer3);
   }
 }
diff --git a/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java b/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java
index 08d5440b9..e6b670a6d 100644
--- a/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java
+++ b/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java
@@ -26,7 +26,6 @@ package com.iluwatar.doubledispatch;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -59,11 +58,11 @@ public class App {
    */
   public static void main(String[] args) {
     // initialize game objects and print their status
-    List<GameObject> objects = new ArrayList<>();
-    objects.add(new FlamingAsteroid(0, 0, 5, 5));
-    objects.add(new SpaceStationMir(1, 1, 2, 2));
-    objects.add(new Meteoroid(10, 10, 15, 15));
-    objects.add(new SpaceStationIss(12, 12, 14, 14));
+    List<GameObject> objects = List.of(
+            new FlamingAsteroid(0, 0, 5, 5),
+            new SpaceStationMir(1, 1, 2, 2),
+            new Meteoroid(10, 10, 15, 15),
+            new SpaceStationIss(12, 12, 14, 14));
     objects.stream().forEach(o -> LOGGER.info(o.toString()));
     LOGGER.info("");
 
diff --git a/facade/README.md b/facade/README.md
index 505ceee39..d6c64500c 100644
--- a/facade/README.md
+++ b/facade/README.md
@@ -146,10 +146,10 @@ public class DwarvenGoldmineFacade {
   private final List<DwarvenMineWorker> workers;
 
   public DwarvenGoldmineFacade() {
-    workers = new ArrayList<>();
-    workers.add(new DwarvenGoldDigger());
-    workers.add(new DwarvenCartOperator());
-    workers.add(new DwarvenTunnelDigger());
+      workers = List.of(
+            new DwarvenGoldDigger(),
+            new DwarvenCartOperator(),
+            new DwarvenTunnelDigger());
   }
 
   public void startNewDay() {
diff --git a/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java b/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java
index e7062f334..b49d46e93 100644
--- a/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java
+++ b/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java
@@ -23,7 +23,6 @@
 
 package com.iluwatar.facade;
 
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
@@ -43,10 +42,10 @@ public class DwarvenGoldmineFacade {
    * Constructor
    */
   public DwarvenGoldmineFacade() {
-    workers = new ArrayList<>();
-    workers.add(new DwarvenGoldDigger());
-    workers.add(new DwarvenCartOperator());
-    workers.add(new DwarvenTunnelDigger());
+    workers = List.of(
+            new DwarvenGoldDigger(),
+            new DwarvenCartOperator(),
+            new DwarvenTunnelDigger());
   }
 
   public void startNewDay() {
diff --git a/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java b/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java
index c139e25b4..78f01474f 100644
--- a/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java
+++ b/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java
@@ -26,7 +26,6 @@ package com.iluwatar.flyweight;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
@@ -46,29 +45,24 @@ public class AlchemistShop {
    * Constructor
    */
   public AlchemistShop() {
-    topShelf = new ArrayList<>();
-    bottomShelf = new ArrayList<>();
-    fillShelves();
-  }
-
-  private void fillShelves() {
-
     PotionFactory factory = new PotionFactory();
-
-    topShelf.add(factory.createPotion(PotionType.INVISIBILITY));
-    topShelf.add(factory.createPotion(PotionType.INVISIBILITY));
-    topShelf.add(factory.createPotion(PotionType.STRENGTH));
-    topShelf.add(factory.createPotion(PotionType.HEALING));
-    topShelf.add(factory.createPotion(PotionType.INVISIBILITY));
-    topShelf.add(factory.createPotion(PotionType.STRENGTH));
-    topShelf.add(factory.createPotion(PotionType.HEALING));
-    topShelf.add(factory.createPotion(PotionType.HEALING));
-
-    bottomShelf.add(factory.createPotion(PotionType.POISON));
-    bottomShelf.add(factory.createPotion(PotionType.POISON));
-    bottomShelf.add(factory.createPotion(PotionType.POISON));
-    bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER));
-    bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER));
+    topShelf = List.of(
+            factory.createPotion(PotionType.INVISIBILITY),
+            factory.createPotion(PotionType.INVISIBILITY),
+            factory.createPotion(PotionType.STRENGTH),
+            factory.createPotion(PotionType.HEALING),
+            factory.createPotion(PotionType.INVISIBILITY),
+            factory.createPotion(PotionType.STRENGTH),
+            factory.createPotion(PotionType.HEALING),
+            factory.createPotion(PotionType.HEALING)
+    );
+    bottomShelf = List.of(
+            factory.createPotion(PotionType.POISON),
+            factory.createPotion(PotionType.POISON),
+            factory.createPotion(PotionType.POISON),
+            factory.createPotion(PotionType.HOLY_WATER),
+            factory.createPotion(PotionType.HOLY_WATER)
+    );
   }
 
   /**