diff --git a/core-java-modules/core-java-lang-math/README.md b/core-java-modules/core-java-lang-math/README.md
index cfa3052f43..b316ed1cfb 100644
--- a/core-java-modules/core-java-lang-math/README.md
+++ b/core-java-modules/core-java-lang-math/README.md
@@ -5,3 +5,4 @@
 ### Relevant Articles: 
 - [Java 8 Math New Methods](https://www.baeldung.com/java-8-math)
 - [Java 8 Unsigned Arithmetic Support](https://www.baeldung.com/java-unsigned-arithmetic)
+- [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/doubles/SplitFloatingPointNumbers.java b/core-java-modules/core-java-lang-math/src/main/java/com/baeldung/doubles/SplitFloatingPointNumbers.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/doubles/SplitFloatingPointNumbers.java
rename to core-java-modules/core-java-lang-math/src/main/java/com/baeldung/doubles/SplitFloatingPointNumbers.java
diff --git a/core-java-modules/core-java-lang-oop-3/README.md b/core-java-modules/core-java-lang-oop-3/README.md
index c3a32124b5..4ac6c3ffe9 100644
--- a/core-java-modules/core-java-lang-oop-3/README.md
+++ b/core-java-modules/core-java-lang-oop-3/README.md
@@ -9,4 +9,9 @@ This module contains articles about Object-oriented programming (OOP) in Java
 - [Guide to the this Java Keyword](https://www.baeldung.com/java-this)
 - [Java Public Access Modifier](https://www.baeldung.com/java-public-keyword)
 - [Composition, Aggregation and Association in Java](https://www.baeldung.com/java-composition-aggregation-association)
+- [Nested Classes in Java](https://www.baeldung.com/java-nested-classes)
+- [A Guide to Inner Interfaces in Java](https://www.baeldung.com/java-inner-interfaces)
+- [Java Classes and Objects](https://www.baeldung.com/java-classes-objects)
+- [Java Interfaces](https://www.baeldung.com/java-interfaces)
+- [Static and Dynamic Binding in Java](https://www.baeldung.com/java-static-dynamic-binding)
 - [[<-- Prev]](/core-java-modules/core-java-lang-oop-2)
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-3/pom.xml b/core-java-modules/core-java-lang-oop-3/pom.xml
index 29807b5bef..1caf17bef3 100644
--- a/core-java-modules/core-java-lang-oop-3/pom.xml
+++ b/core-java-modules/core-java-lang-oop-3/pom.xml
@@ -1,7 +1,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>core-java-lang-oop-3</artifactId>
     <version>0.1.0-SNAPSHOT</version>
     <name>core-java-lang-oop-3</name>
@@ -15,6 +14,24 @@
     </parent>
 
     <dependencies>
+        <!-- logging -->
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+        <dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
+            <groupId>org.slf4j</groupId>
+            <artifactId>log4j-over-slf4j</artifactId>
+            <version>${org.slf4j.version}</version>
+        </dependency>
+        <!-- test scoped -->
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj-core.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -23,4 +40,18 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <finalName>core-java-lang-oop-3</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+        <assertj-core.version>3.10.0</assertj-core.version>
+    </properties>
+
 </project>
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/Animal.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/Animal.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/Animal.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/Animal.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/AnimalActivity.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/AnimalActivity.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/AnimalActivity.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/AnimalActivity.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/Cat.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/Cat.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/binding/Cat.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/binding/Cat.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/CommaSeparatedCustomers.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/CommaSeparatedCustomers.java
similarity index 92%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/CommaSeparatedCustomers.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/CommaSeparatedCustomers.java
index 29ed2d3d26..a815720d62 100644
--- a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/CommaSeparatedCustomers.java
+++ b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/CommaSeparatedCustomers.java
@@ -1,4 +1,4 @@
-package com.baeldung.interfaces;
+package com.baeldung.innerinterfaces;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Customer.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/Customer.java
similarity index 88%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Customer.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/Customer.java
index d2f2b48074..ce27460cbb 100644
--- a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Customer.java
+++ b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/innerinterfaces/Customer.java
@@ -1,4 +1,4 @@
-package com.baeldung.interfaces;
+package com.baeldung.innerinterfaces;
 
 public class Customer {
     public interface List {
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Box.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/Box.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Box.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/Box.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Employee.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/Employee.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/Employee.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/Employee.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/EmployeeSalaryComparator.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/EmployeeSalaryComparator.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/EmployeeSalaryComparator.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/EmployeeSalaryComparator.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/HasColor.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/HasColor.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/HasColor.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/HasColor.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Car.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Car.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Car.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Car.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Fly.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Fly.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Fly.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Fly.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Transform.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Transform.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Transform.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Transform.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Vehicle.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Vehicle.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/multiinheritance/Vehicle.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/multiinheritance/Vehicle.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Circle.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Circle.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Circle.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Circle.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/MainTestClass.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/MainTestClass.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/MainTestClass.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/MainTestClass.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Shape.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Shape.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Shape.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Shape.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Square.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Square.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/interfaces/polymorphysim/Square.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/interfaces/polymorphysim/Square.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/objects/Car.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/objects/Car.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/objects/Car.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/objects/Car.java
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java
similarity index 99%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java
index 0e1746fc38..2c6ff3d683 100644
--- a/core-java-modules/core-java-lang/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java
+++ b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/parameterpassing/NonPrimitives.java
@@ -17,7 +17,7 @@ public class NonPrimitives {
         b1.num++;
     }
 }
- 
+
 class FooClass {
     public int num;
    
diff --git a/core-java-modules/core-java-lang/src/main/java/com/baeldung/parameterpassing/Primitives.java b/core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/parameterpassing/Primitives.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/main/java/com/baeldung/parameterpassing/Primitives.java
rename to core-java-modules/core-java-lang-oop-3/src/main/java/com/baeldung/parameterpassing/Primitives.java
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/AnimalActivityUnitTest.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/AnimalActivityUnitTest.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/AnimalActivityUnitTest.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/AnimalActivityUnitTest.java
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/AnimalUnitTest.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/AnimalUnitTest.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/AnimalUnitTest.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/AnimalUnitTest.java
index a34640b58a..11201965d9 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/AnimalUnitTest.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/AnimalUnitTest.java
@@ -14,13 +14,13 @@ import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
 import org.slf4j.LoggerFactory;
 
+import java.util.List;
+
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
-import java.util.List;
-
 /**
  * Created by madhumita.g on 01-08-2018.
  */
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/CatUnitTest.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/CatUnitTest.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/binding/CatUnitTest.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/binding/CatUnitTest.java
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/interfaces/InnerInterfaceUnitTest.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/innerinterfaces/InnerInterfaceUnitTest.java
similarity index 78%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/interfaces/InnerInterfaceUnitTest.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/innerinterfaces/InnerInterfaceUnitTest.java
index 65d7c860a8..65e51ed93d 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/interfaces/InnerInterfaceUnitTest.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/innerinterfaces/InnerInterfaceUnitTest.java
@@ -1,11 +1,13 @@
-package com.baeldung.interfaces;
-
-import static org.junit.Assert.assertEquals;
+package com.baeldung.innerinterfaces;
 
+import com.baeldung.innerinterfaces.CommaSeparatedCustomers;
+import com.baeldung.innerinterfaces.Customer;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import static org.junit.Assert.assertEquals;
+
 @RunWith(JUnit4.class)
 public class InnerInterfaceUnitTest {
     @Test
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/AnonymousInner.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/AnonymousInner.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/AnonymousInner.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/AnonymousInner.java
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Enclosing.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Enclosing.java
similarity index 81%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Enclosing.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Enclosing.java
index 3db33cde9b..a7c0e1b29f 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Enclosing.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Enclosing.java
@@ -15,7 +15,7 @@ public class Enclosing {
 
     @Test
     public void test() {
-        Enclosing.StaticNested nested = new Enclosing.StaticNested();
+        StaticNested nested = new StaticNested();
         nested.run();
     }
 }
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/NewEnclosing.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/NewEnclosing.java
similarity index 100%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/NewEnclosing.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/NewEnclosing.java
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/NewOuter.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/NewOuter.java
similarity index 91%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/NewOuter.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/NewOuter.java
index 260f69fd1b..37c8be7817 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/NewOuter.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/NewOuter.java
@@ -23,7 +23,7 @@ public class NewOuter {
     @Test
     public void test() {
         NewOuter outer = new NewOuter();
-        NewOuter.InnerClass inner = outer.new InnerClass();
+        InnerClass inner = outer.new InnerClass();
         inner.run();
 
     }
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Outer.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Outer.java
similarity index 86%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Outer.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Outer.java
index d5e46670c9..196cd6cd38 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/nestedclass/Outer.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/nestedclass/Outer.java
@@ -14,7 +14,7 @@ public class Outer {
     @Test
     public void test() {
         Outer outer = new Outer();
-        Outer.Inner inner = outer.new Inner();
+        Inner inner = outer.new Inner();
         inner.run();
     }
 }
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/objects/CarUnitTest.java b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/objects/ObjectsUnitTest.java
similarity index 96%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/objects/CarUnitTest.java
rename to core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/objects/ObjectsUnitTest.java
index a1ef20523e..e0f8766be4 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/objects/CarUnitTest.java
+++ b/core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/objects/ObjectsUnitTest.java
@@ -1,11 +1,11 @@
 package com.baeldung.objects;
 
-import static org.junit.Assert.*;
-
 import org.junit.Before;
 import org.junit.Test;
 
-public class CarUnitTest {
+import static org.junit.Assert.*;
+
+public class ObjectsUnitTest {
     
     private Car car;
 
diff --git a/core-java-modules/core-java-lang/README.md b/core-java-modules/core-java-lang/README.md
index 3c33409e7e..9b485d80e9 100644
--- a/core-java-modules/core-java-lang/README.md
+++ b/core-java-modules/core-java-lang/README.md
@@ -3,22 +3,14 @@
 This module contains articles about core features in the Java language
 
 ### Relevant Articles: 
-
 - [Generate equals() and hashCode() with Eclipse](https://www.baeldung.com/java-eclipse-equals-and-hashcode)
 - [Iterating Over Enum Values in Java](https://www.baeldung.com/java-enum-iteration)
 - [Comparator and Comparable in Java](https://www.baeldung.com/java-comparator-comparable)
-- [Nested Classes in Java](https://www.baeldung.com/java-nested-classes)
-- [A Guide to Inner Interfaces in Java](https://www.baeldung.com/java-inner-interfaces)
 - [Recursion In Java](https://www.baeldung.com/java-recursion)
 - [A Guide to the finalize Method in Java](https://www.baeldung.com/java-finalize)
 - [Quick Guide to java.lang.System](https://www.baeldung.com/java-lang-system)
 - [Using Java Assertions](https://www.baeldung.com/java-assert)
-- [Static and Dynamic Binding in Java](https://www.baeldung.com/java-static-dynamic-binding)
 - [Synthetic Constructs in Java](https://www.baeldung.com/java-synthetic)
-- [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
 - [Retrieving a Class Name in Java](https://www.baeldung.com/java-class-name)
-- [Java Interfaces](https://www.baeldung.com/java-interfaces)
 - [Attaching Values to Java Enum](https://www.baeldung.com/java-enum-values)
-- [Java Classes and Objects](https://www.baeldung.com/java-classes-objects)
-- [A Guide to Java Enums](https://www.baeldung.com/a-guide-to-java-enums)
 - [[More --> ]](/core-java-modules/core-java-lang-2)
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/DaysOfWeekEnum.java b/core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/DaysOfWeekEnum.java
similarity index 92%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/DaysOfWeekEnum.java
rename to core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/DaysOfWeekEnum.java
index 89e718adf3..f25ddfa6dd 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/DaysOfWeekEnum.java
+++ b/core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/DaysOfWeekEnum.java
@@ -1,4 +1,4 @@
-package com.baeldung.java.enumiteration;
+package com.baeldung.enums.iteration;
 
 import java.util.stream.Stream;
 
diff --git a/core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/EnumIterationExamples.java b/core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/EnumIterationExamples.java
similarity index 97%
rename from core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/EnumIterationExamples.java
rename to core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/EnumIterationExamples.java
index 110943e39f..9b058aef83 100644
--- a/core-java-modules/core-java-lang/src/test/java/com/baeldung/java/enumiteration/EnumIterationExamples.java
+++ b/core-java-modules/core-java-lang/src/test/java/com/baeldung/enums/iteration/EnumIterationExamples.java
@@ -1,4 +1,4 @@
-package com.baeldung.java.enumiteration;
+package com.baeldung.enums.iteration;
 
 import java.util.ArrayList;
 import java.util.Arrays;