diff --git a/builder/src/main/java/com/iluwatar/builder/Hero.java b/builder/src/main/java/com/iluwatar/builder/Hero.java
index ecc6ec711719..1d15ac2f0a18 100644
--- a/builder/src/main/java/com/iluwatar/builder/Hero.java
+++ b/builder/src/main/java/com/iluwatar/builder/Hero.java
@@ -25,48 +25,13 @@
 package com.iluwatar.builder;
 
 /**
- * Hero, the class with many parameters.
+ * Hero,the record class.
  */
-public final class Hero {
 
-  private final Profession profession;
-  private final String name;
-  private final HairType hairType;
-  private final HairColor hairColor;
-  private final Armor armor;
-  private final Weapon weapon;
+public record Hero(Profession profession, String name, HairType hairType, HairColor hairColor, Armor armor, Weapon weapon) {
 
   private Hero(Builder builder) {
-    this.profession = builder.profession;
-    this.name = builder.name;
-    this.hairColor = builder.hairColor;
-    this.hairType = builder.hairType;
-    this.weapon = builder.weapon;
-    this.armor = builder.armor;
-  }
-
-  public Profession getProfession() {
-    return profession;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  public HairType getHairType() {
-    return hairType;
-  }
-
-  public HairColor getHairColor() {
-    return hairColor;
-  }
-
-  public Armor getArmor() {
-    return armor;
-  }
-
-  public Weapon getWeapon() {
-    return weapon;
+    this(builder.profession, builder.name, builder.hairType, builder.hairColor, builder.armor, builder.weapon);
   }
 
   @Override
diff --git a/builder/src/test/java/com/iluwatar/builder/HeroTest.java b/builder/src/test/java/com/iluwatar/builder/HeroTest.java
index 27f7fb931dab..fe70d1547b88 100644
--- a/builder/src/test/java/com/iluwatar/builder/HeroTest.java
+++ b/builder/src/test/java/com/iluwatar/builder/HeroTest.java
@@ -69,12 +69,12 @@ void testBuildHero() {
 
     assertNotNull(hero);
     assertNotNull(hero.toString());
-    assertEquals(Profession.WARRIOR, hero.getProfession());
-    assertEquals(heroName, hero.getName());
-    assertEquals(Armor.CHAIN_MAIL, hero.getArmor());
-    assertEquals(Weapon.SWORD, hero.getWeapon());
-    assertEquals(HairType.LONG_CURLY, hero.getHairType());
-    assertEquals(HairColor.BLOND, hero.getHairColor());
+    assertEquals(Profession.WARRIOR, hero.profession());
+    assertEquals(heroName, hero.name());
+    assertEquals(Armor.CHAIN_MAIL, hero.armor());
+    assertEquals(Weapon.SWORD, hero.weapon());
+    assertEquals(HairType.LONG_CURLY, hero.hairType());
+    assertEquals(HairColor.BLOND, hero.hairColor());
 
   }
 
diff --git a/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/TargetTest.java b/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/TargetTest.java
index dcecb27300d4..dd4e09b84166 100644
--- a/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/TargetTest.java
+++ b/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/TargetTest.java
@@ -1,5 +1,5 @@
 /*
- * This project is licensed under the MIT license. Module intercepting-filter is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
  *
  * The MIT License
  * Copyright © 2014-2022 Ilkka Seppälä
diff --git a/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/FileSelectorJframeTest.java b/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/FileSelectorJframeTest.java
index bad021dc1c80..da5788c8d6cc 100644
--- a/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/FileSelectorJframeTest.java
+++ b/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/FileSelectorJframeTest.java
@@ -1,5 +1,5 @@
 /*
- * This project is licensed under the MIT license. Module model-view-presenter is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
  *
  * The MIT License
  * Copyright © 2014-2022 Ilkka Seppälä
diff --git a/monad/src/main/java/com/iluwatar/monad/App.java b/monad/src/main/java/com/iluwatar/monad/App.java
index 680bf8c9e3e4..7ee04f1b8c31 100644
--- a/monad/src/main/java/com/iluwatar/monad/App.java
+++ b/monad/src/main/java/com/iluwatar/monad/App.java
@@ -54,10 +54,10 @@ public class App {
    */
   public static void main(String[] args) {
     var user = new User("user", 24, Sex.FEMALE, "foobar.com");
-    LOGGER.info(Validator.of(user).validate(User::getName, Objects::nonNull, "name is null")
-        .validate(User::getName, name -> !name.isEmpty(), "name is empty")
-        .validate(User::getEmail, email -> !email.contains("@"), "email doesn't contains '@'")
-        .validate(User::getAge, age -> age > 20 && age < 30, "age isn't between...").get()
+    LOGGER.info(Validator.of(user).validate(User::name, Objects::nonNull, "name is null")
+        .validate(User::name, name -> !name.isEmpty(), "name is empty")
+        .validate(User::email, email -> !email.contains("@"), "email doesn't contains '@'")
+        .validate(User::age, age -> age > 20 && age < 30, "age isn't between...").get()
         .toString());
   }
 }
diff --git a/monad/src/main/java/com/iluwatar/monad/User.java b/monad/src/main/java/com/iluwatar/monad/User.java
index d6647d03209f..089279a8db59 100644
--- a/monad/src/main/java/com/iluwatar/monad/User.java
+++ b/monad/src/main/java/com/iluwatar/monad/User.java
@@ -25,43 +25,13 @@
 package com.iluwatar.monad;
 
 /**
- * User Definition.
+ * Record class.
+ *
+ * @param name  - name
+ * @param age   - age
+ * @param sex   - sex
+ * @param email - email address
  */
-public class User {
-
-  private final String name;
-  private final int age;
-  private final Sex sex;
-  private final String email;
-
-  /**
-   * Constructor.
-   *
-   * @param name  - name
-   * @param age   - age
-   * @param sex   - sex
-   * @param email - email address
-   */
-  public User(String name, int age, Sex sex, String email) {
-    this.name = name;
-    this.age = age;
-    this.sex = sex;
-    this.email = email;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  public int getAge() {
-    return age;
-  }
-
-  public Sex getSex() {
-    return sex;
-  }
-
-  public String getEmail() {
-    return email;
-  }
+public record User(String name, int age, Sex sex, String email) {
 }
+
diff --git a/monad/src/test/java/com/iluwatar/monad/MonadTest.java b/monad/src/test/java/com/iluwatar/monad/MonadTest.java
index 44d587b087ed..1eed42b12bc4 100644
--- a/monad/src/test/java/com/iluwatar/monad/MonadTest.java
+++ b/monad/src/test/java/com/iluwatar/monad/MonadTest.java
@@ -41,7 +41,7 @@ void testForInvalidName() {
     assertThrows(
         IllegalStateException.class,
         () -> Validator.of(tom)
-            .validate(User::getName, Objects::nonNull, "name cannot be null")
+            .validate(User::name, Objects::nonNull, "name cannot be null")
             .get()
     );
   }
@@ -52,8 +52,8 @@ void testForInvalidAge() {
     assertThrows(
         IllegalStateException.class,
         () -> Validator.of(john)
-            .validate(User::getName, Objects::nonNull, "name cannot be null")
-            .validate(User::getAge, age -> age > 21, "user is underage")
+            .validate(User::name, Objects::nonNull, "name cannot be null")
+            .validate(User::age, age -> age > 21, "user is underage")
             .get()
     );
   }
@@ -62,10 +62,10 @@ void testForInvalidAge() {
   void testForValid() {
     var sarah = new User("Sarah", 42, Sex.FEMALE, "sarah@det.org");
     var validated = Validator.of(sarah)
-        .validate(User::getName, Objects::nonNull, "name cannot be null")
-        .validate(User::getAge, age -> age > 21, "user is underage")
-        .validate(User::getSex, sex -> sex == Sex.FEMALE, "user is not female")
-        .validate(User::getEmail, email -> email.contains("@"), "email does not contain @ sign")
+        .validate(User::name, Objects::nonNull, "name cannot be null")
+        .validate(User::age, age -> age > 21, "user is underage")
+        .validate(User::sex, sex -> sex == Sex.FEMALE, "user is not female")
+        .validate(User::email, email -> email.contains("@"), "email does not contain @ sign")
         .get();
     assertSame(validated, sarah);
   }
diff --git a/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java b/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java
index c35f4afb9edf..9dd4ccf2c9db 100644
--- a/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java
+++ b/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java
@@ -29,27 +29,9 @@
 /**
  * Implementation for binary tree's normal nodes.
  */
-@Slf4j
-public class NodeImpl implements Node {
-
-  private final String name;
-  private final Node left;
-  private final Node right;
-
-  /**
-   * Constructor.
-   */
-  public NodeImpl(String name, Node left, Node right) {
-    this.name = name;
-    this.left = left;
-    this.right = right;
-  }
-
-  @Override
-  public int getTreeSize() {
-    return 1 + left.getTreeSize() + right.getTreeSize();
-  }
 
+@Slf4j
+public record NodeImpl(String name, Node left, Node right) implements Node {
   @Override
   public Node getLeft() {
     return left;
@@ -64,7 +46,10 @@ public Node getRight() {
   public String getName() {
     return name;
   }
-
+  @Override
+  public int getTreeSize() {
+    return 1 + left.getTreeSize() + right.getTreeSize();
+  }
   @Override
   public void walk() {
     LOGGER.info(name);
diff --git a/partial-response/src/main/java/com/iluwatar/partialresponse/Video.java b/partial-response/src/main/java/com/iluwatar/partialresponse/Video.java
index 98322c4fab0d..5c71f9bb37d3 100644
--- a/partial-response/src/main/java/com/iluwatar/partialresponse/Video.java
+++ b/partial-response/src/main/java/com/iluwatar/partialresponse/Video.java
@@ -26,34 +26,10 @@
 
 /**
  * {@link Video} is a entity to serve from server.It contains all video related information.
+ * Video is a record class.
  */
-public class Video {
-  private final Integer id;
-  private final String title;
-  private final Integer length;
-  private final String description;
-  private final String director;
-  private final String language;
-
-  /**
-   * Constructor.
-   *
-   * @param id       video unique id
-   * @param title    video title
-   * @param len      video length in minutes
-   * @param desc     video description by publisher
-   * @param director video director name
-   * @param lang     video language {private, public}
-   */
-  public Video(Integer id, String title, Integer len, String desc, String director, String lang) {
-    this.id = id;
-    this.title = title;
-    this.length = len;
-    this.description = desc;
-    this.director = director;
-    this.language = lang;
-  }
 
+public record Video(Integer id, String title, Integer length, String description, String director, String language) {
   /**
    * ToString.
    *
@@ -62,12 +38,12 @@ public Video(Integer id, String title, Integer len, String desc, String director
   @Override
   public String toString() {
     return "{"
-        + "\"id\": " + id + ","
-        + "\"title\": \"" + title + "\","
-        + "\"length\": " + length + ","
-        + "\"description\": \"" + description + "\","
-        + "\"director\": \"" + director + "\","
-        + "\"language\": \"" + language + "\","
-        + "}";
+            + "\"id\": " + id + ","
+            + "\"title\": \"" + title + "\","
+            + "\"length\": " + length + ","
+            + "\"description\": \"" + description + "\","
+            + "\"director\": \"" + director + "\","
+            + "\"language\": \"" + language + "\","
+            + "}";
   }
 }
diff --git a/partial-response/src/main/java/com/iluwatar/partialresponse/VideoResource.java b/partial-response/src/main/java/com/iluwatar/partialresponse/VideoResource.java
index 9289857bede4..84dd35a3e0d8 100644
--- a/partial-response/src/main/java/com/iluwatar/partialresponse/VideoResource.java
+++ b/partial-response/src/main/java/com/iluwatar/partialresponse/VideoResource.java
@@ -27,24 +27,14 @@
 import java.util.Map;
 
 /**
- * The resource class which serves video information. This class act as server in the demo. Which
+ * The resource record class which serves video information. This class act as server in the demo. Which
  * has all video details.
+ *
+ * @param fieldJsonMapper map object to json.
+ * @param videos          initialize resource with existing videos. Act as database.
  */
-public class VideoResource {
-  private final FieldJsonMapper fieldJsonMapper;
-  private final Map<Integer, Video> videos;
-
-  /**
-   * Constructor.
-   *
-   * @param fieldJsonMapper map object to json.
-   * @param videos          initialize resource with existing videos. Act as database.
-   */
-  public VideoResource(FieldJsonMapper fieldJsonMapper, Map<Integer, Video> videos) {
-    this.fieldJsonMapper = fieldJsonMapper;
-    this.videos = videos;
-  }
 
+public record VideoResource(FieldJsonMapper fieldJsonMapper, Map<Integer, Video> videos) {
   /**
    * Get Details.
    *
diff --git a/private-class-data/src/main/java/com/iluwatar/privateclassdata/ImmutableStew.java b/private-class-data/src/main/java/com/iluwatar/privateclassdata/ImmutableStew.java
index 34d0875c254d..e13577911eb5 100644
--- a/private-class-data/src/main/java/com/iluwatar/privateclassdata/ImmutableStew.java
+++ b/private-class-data/src/main/java/com/iluwatar/privateclassdata/ImmutableStew.java
@@ -44,6 +44,6 @@ public ImmutableStew(int numPotatoes, int numCarrots, int numMeat, int numPepper
   public void mix() {
     LOGGER
         .info("Mixing the immutable stew we find: {} potatoes, {} carrots, {} meat and {} peppers",
-            data.getNumPotatoes(), data.getNumCarrots(), data.getNumMeat(), data.getNumPeppers());
+            data.numPotatoes(), data.numCarrots(), data.numMeat(), data.numPeppers());
   }
 }
diff --git a/private-class-data/src/main/java/com/iluwatar/privateclassdata/StewData.java b/private-class-data/src/main/java/com/iluwatar/privateclassdata/StewData.java
index e3900f175ba7..a973fde6d5de 100644
--- a/private-class-data/src/main/java/com/iluwatar/privateclassdata/StewData.java
+++ b/private-class-data/src/main/java/com/iluwatar/privateclassdata/StewData.java
@@ -27,36 +27,6 @@
 /**
  * Stew ingredients.
  */
-public class StewData {
 
-  private final int numPotatoes;
-  private final int numCarrots;
-  private final int numMeat;
-  private final int numPeppers;
-
-  /**
-   * Constructor.
-   */
-  public StewData(int numPotatoes, int numCarrots, int numMeat, int numPeppers) {
-    this.numPotatoes = numPotatoes;
-    this.numCarrots = numCarrots;
-    this.numMeat = numMeat;
-    this.numPeppers = numPeppers;
-  }
-
-  public int getNumPotatoes() {
-    return numPotatoes;
-  }
-
-  public int getNumCarrots() {
-    return numCarrots;
-  }
-
-  public int getNumMeat() {
-    return numMeat;
-  }
-
-  public int getNumPeppers() {
-    return numPeppers;
-  }
+public record StewData(int numPotatoes, int numCarrots, int numMeat, int numPeppers) {
 }
diff --git a/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Consumer.java b/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Consumer.java
index e3879214c1c1..1d26f2b4a5fa 100644
--- a/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Consumer.java
+++ b/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Consumer.java
@@ -47,7 +47,7 @@ public Consumer(String name, ItemQueue queue) {
   public void consume() throws InterruptedException {
     var item = queue.take();
     LOGGER.info("Consumer [{}] consume item [{}] produced by [{}]", name,
-        item.getId(), item.getProducer());
+        item.id(), item.producer());
 
   }
 }
diff --git a/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java b/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java
index e7b79bdfde6e..51353ee7a785 100644
--- a/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java
+++ b/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java
@@ -27,25 +27,5 @@
 /**
  * Class take part of an {@link Producer}-{@link Consumer} exchange.
  */
-public class Item {
-
-  private final String producer;
-
-  private final int id;
-
-  public Item(String producer, int id) {
-    this.id = id;
-    this.producer = producer;
-  }
-
-  public int getId() {
-
-    return id;
-  }
-
-  public String getProducer() {
-
-    return producer;
-  }
-
+public record Item(String producer, int id) {
 }
diff --git a/registry/src/main/java/com/iluwatar/registry/Customer.java b/registry/src/main/java/com/iluwatar/registry/Customer.java
index b544ed63bab2..75dd42a5f027 100644
--- a/registry/src/main/java/com/iluwatar/registry/Customer.java
+++ b/registry/src/main/java/com/iluwatar/registry/Customer.java
@@ -27,23 +27,7 @@
 /**
  * Customer entity used in registry pattern example.
  */
-public class Customer {
-
-  private final String id;
-  private final String name;
-
-  public Customer(String id, String name) {
-    this.id = id;
-    this.name = name;
-  }
-
-  public String getId() {
-    return id;
-  }
-
-  public String getName() {
-    return name;
-  }
+public record Customer(String id, String name) {
 
   @Override
   public String toString() {
diff --git a/registry/src/main/java/com/iluwatar/registry/CustomerRegistry.java b/registry/src/main/java/com/iluwatar/registry/CustomerRegistry.java
index f1e8bbf217d4..14039ca8b5a7 100644
--- a/registry/src/main/java/com/iluwatar/registry/CustomerRegistry.java
+++ b/registry/src/main/java/com/iluwatar/registry/CustomerRegistry.java
@@ -45,7 +45,7 @@ private CustomerRegistry() {
   }
 
   public Customer addCustomer(Customer customer) {
-    return customerMap.put(customer.getId(), customer);
+    return customerMap.put(customer.id(), customer);
   }
 
   public Customer getCustomer(String id) {
diff --git a/registry/src/test/java/com/iluwatar/registry/CustomerRegistryTest.java b/registry/src/test/java/com/iluwatar/registry/CustomerRegistryTest.java
index c39c03654f4d..af0697c458c9 100644
--- a/registry/src/test/java/com/iluwatar/registry/CustomerRegistryTest.java
+++ b/registry/src/test/java/com/iluwatar/registry/CustomerRegistryTest.java
@@ -50,13 +50,13 @@ void shouldBeAbleToAddAndQueryCustomerObjectFromRegistry() {
 
     Customer customerWithId1 = customerRegistry.getCustomer("1");
     assertNotNull(customerWithId1);
-    assertEquals("1", customerWithId1.getId());
-    assertEquals("john", customerWithId1.getName());
+    assertEquals("1", customerWithId1.id());
+    assertEquals("john", customerWithId1.name());
 
     Customer customerWithId2 = customerRegistry.getCustomer("2");
     assertNotNull(customerWithId2);
-    assertEquals("2", customerWithId2.getId());
-    assertEquals("julia", customerWithId2.getName());
+    assertEquals("2", customerWithId2.id());
+    assertEquals("julia", customerWithId2.name());
   }
 
   @Test
diff --git a/retry/src/main/java/com/iluwatar/retry/FindCustomer.java b/retry/src/main/java/com/iluwatar/retry/FindCustomer.java
index b11af29b242e..815cdcb3acd3 100644
--- a/retry/src/main/java/com/iluwatar/retry/FindCustomer.java
+++ b/retry/src/main/java/com/iluwatar/retry/FindCustomer.java
@@ -37,21 +37,11 @@
  *
  * @author George Aristy (george.aristy@gmail.com)
  */
-public final class FindCustomer implements BusinessOperation<String> {
-  private final String customerId;
-  private final Deque<BusinessException> errors;
 
-  /**
-   * Ctor.
-   *
-   * @param customerId the final result of the remote operation
-   * @param errors     the errors to throw before returning {@code customerId}
-   */
+public record FindCustomer(String customerId, Deque<BusinessException> errors) implements BusinessOperation<String> {
   public FindCustomer(String customerId, BusinessException... errors) {
-    this.customerId = customerId;
-    this.errors = new ArrayDeque<>(List.of(errors));
+    this(customerId, new ArrayDeque<>(List.of(errors)));
   }
-
   @Override
   public String perform() throws BusinessException {
     if (!this.errors.isEmpty()) {
diff --git a/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java b/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java
index 06231f81b0ad..cdb2b6c1d18d 100644
--- a/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java
+++ b/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java
@@ -27,26 +27,15 @@
 /**
  * InvoiceGenerator class generates an invoice, accepting the product cost and calculating the total
  * price payable inclusive tax (calculated by {@link TaxCalculator}).
+ *
  */
-public class InvoiceGenerator {
-
-  /**
+public record InvoiceGenerator(double amount, TaxCalculator taxCalculator) {
+  /** TaxCalculator description:
    * The TaxCalculator interface to calculate the payable tax.
-   */
-  private final TaxCalculator taxCalculator;
-
-  /**
+   * Amount description:
    * The base product amount without tax.
    */
-  private final double amount;
-
-  public InvoiceGenerator(double amount, TaxCalculator taxCalculator) {
-    this.amount = amount;
-    this.taxCalculator = taxCalculator;
-  }
-
   public double getAmountWithTax() {
     return amount + taxCalculator.calculate(amount);
   }
-
-}
\ No newline at end of file
+}
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Action.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Action.java
index 9f885757a851..ecfe870bcd13 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Action.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Action.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import com.iluwatar.model.view.controller.Fatigue;
@@ -27,9 +51,9 @@ public Action(GiantModel giant) {
    * @param command the command
    */
   public void updateModel(Command command) {
-    setFatigue(command.getFatigue());
-    setHealth(command.getHealth());
-    setNourishment(command.getNourishment());
+    setFatigue(command.fatigue());
+    setHealth(command.health());
+    setNourishment(command.nourishment());
   }
 
   /**
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/App.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/App.java
index 2d41dba87196..3a078e1aa380 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/App.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/App.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import com.iluwatar.model.view.controller.Fatigue;
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Command.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Command.java
index e58cf85cb331..df6d80eb422a 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Command.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Command.java
@@ -1,32 +1,40 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import com.iluwatar.model.view.controller.Fatigue;
 import com.iluwatar.model.view.controller.Health;
 import com.iluwatar.model.view.controller.Nourishment;
-import lombok.Getter;
 
 /**
  * The type Command.
+ * Instantiates a new Command.
+ *
+ * @param fatigue     the fatigue
+ * @param health      the health
+ * @param nourishment the nourishment
  */
-public class Command {
-
-  @Getter
-  private final Fatigue fatigue;
-  @Getter
-  private final Health health;
-  @Getter
-  private final Nourishment nourishment;
-
-  /**
-   * Instantiates a new Command.
-   *
-   * @param fatigue     the fatigue
-   * @param health      the health
-   * @param nourishment the nourishment
-   */
-  public Command(Fatigue fatigue, Health health, Nourishment nourishment) {
-    this.fatigue = fatigue;
-    this.health = health;
-    this.nourishment = nourishment;
-  }
+public record Command(Fatigue fatigue, Health health, Nourishment nourishment) {
 }
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Dispatcher.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Dispatcher.java
index 511e08b11301..784784478af2 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Dispatcher.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/Dispatcher.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import java.util.ArrayList;
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantController.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantController.java
index 6db186004c1f..1b830b467e02 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantController.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantController.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import lombok.Getter;
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantModel.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantModel.java
index e0e67997588c..202c25e5650c 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantModel.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantModel.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import com.iluwatar.model.view.controller.Fatigue;
diff --git a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantView.java b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantView.java
index cebe03a94ce5..44d256cdbf13 100644
--- a/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantView.java
+++ b/service-to-worker/src/main/java/com/iluwatar/servicetoworker/GiantView.java
@@ -1,3 +1,27 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.servicetoworker;
 
 import lombok.extern.slf4j.Slf4j;