diff --git a/core-java-modules/java-numbers-4/README.md b/core-java-modules/core-java-numbers-4/README.md
similarity index 100%
rename from core-java-modules/java-numbers-4/README.md
rename to core-java-modules/core-java-numbers-4/README.md
diff --git a/core-java-modules/java-numbers-4/pom.xml b/core-java-modules/core-java-numbers-4/pom.xml
similarity index 90%
rename from core-java-modules/java-numbers-4/pom.xml
rename to core-java-modules/core-java-numbers-4/pom.xml
index b3ecb3be42..4fe8b292da 100644
--- a/core-java-modules/java-numbers-4/pom.xml
+++ b/core-java-modules/core-java-numbers-4/pom.xml
@@ -2,8 +2,8 @@
     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>
-    <artifactId>java-numbers-4</artifactId>
-    <name>java-numbers-4</name>
+    <artifactId>core-java-numbers-4</artifactId>
+    <name>core-java-numbers-4</name>
     <packaging>jar</packaging>
 
     <parent>
@@ -31,7 +31,7 @@
     </dependencies>
 
     <build>
-        <finalName>java-numbers-4</finalName>
+        <finalName>core-java-numbers-4</finalName>
         <resources>
             <resource>
                 <directory>src/main/resources</directory>
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/automorphicnumber/AutomorphicNumber.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/automorphicnumber/AutomorphicNumber.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/automorphicnumber/AutomorphicNumber.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/automorphicnumber/AutomorphicNumber.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/booleantoint/BooleanToInt.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/booleantoint/BooleanToInt.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/booleantoint/BooleanToInt.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/booleantoint/BooleanToInt.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/convertLongToInt/ConvertLongToInt.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/convertLongToInt/ConvertLongToInt.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/convertLongToInt/ConvertLongToInt.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/convertLongToInt/ConvertLongToInt.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/humanreadablebytes/FileSizeFormatUtil.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/humanreadablebytes/FileSizeFormatUtil.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/humanreadablebytes/FileSizeFormatUtil.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/humanreadablebytes/FileSizeFormatUtil.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/number_0xff/Number0xff.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/number_0xff/Number0xff.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/number_0xff/Number0xff.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/number_0xff/Number0xff.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/perfectsquare/PerfectSquareUtil.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/perfectsquare/PerfectSquareUtil.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/perfectsquare/PerfectSquareUtil.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/perfectsquare/PerfectSquareUtil.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/probability/MaleHeightGenerator.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/probability/MaleHeightGenerator.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/probability/MaleHeightGenerator.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/probability/MaleHeightGenerator.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/probability/RandomInvoker.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/probability/RandomInvoker.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/probability/RandomInvoker.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/probability/RandomInvoker.java
diff --git a/core-java-modules/java-numbers-4/src/main/java/com/baeldung/reversenumber/ReverseNumber.java b/core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/reversenumber/ReverseNumber.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/main/java/com/baeldung/reversenumber/ReverseNumber.java
rename to core-java-modules/core-java-numbers-4/src/main/java/com/baeldung/reversenumber/ReverseNumber.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/automorphicnumber/AutomorphicNumberUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/automorphicnumber/AutomorphicNumberUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/automorphicnumber/AutomorphicNumberUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/automorphicnumber/AutomorphicNumberUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/bigdecimalzero/BigDecimalZeroChkUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/bigdecimalzero/BigDecimalZeroChkUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/bigdecimalzero/BigDecimalZeroChkUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/bigdecimalzero/BigDecimalZeroChkUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/biginteger/BigIntegerUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/biginteger/BigIntegerUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/biginteger/BigIntegerUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/biginteger/BigIntegerUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/booleantoint/BooleanToIntUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/booleantoint/BooleanToIntUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/booleantoint/BooleanToIntUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/booleantoint/BooleanToIntUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/convertLongToInt/ConvertLongToIntUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/convertLongToInt/ConvertLongToIntUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/convertLongToInt/ConvertLongToIntUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/convertLongToInt/ConvertLongToIntUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/humanreadablebytes/FileSizeFormatUtilUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/humanreadablebytes/FileSizeFormatUtilUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/humanreadablebytes/FileSizeFormatUtilUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/humanreadablebytes/FileSizeFormatUtilUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/perfectsquare/PerfectSquareUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/perfectsquare/PerfectSquareUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/perfectsquare/PerfectSquareUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/perfectsquare/PerfectSquareUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/probability/RandomInvokerUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/probability/RandomInvokerUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/probability/RandomInvokerUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/probability/RandomInvokerUnitTest.java
diff --git a/core-java-modules/java-numbers-4/src/test/java/com/baeldung/reversenumber/ReverseNumberUnitTest.java b/core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/reversenumber/ReverseNumberUnitTest.java
similarity index 100%
rename from core-java-modules/java-numbers-4/src/test/java/com/baeldung/reversenumber/ReverseNumberUnitTest.java
rename to core-java-modules/core-java-numbers-4/src/test/java/com/baeldung/reversenumber/ReverseNumberUnitTest.java