diff --git a/core-groovy-2/determine-datatype/pom.xml b/core-groovy-2/determine-datatype/pom.xml
deleted file mode 100644
index e03cb58ead..0000000000
--- a/core-groovy-2/determine-datatype/pom.xml
+++ /dev/null
@@ -1,44 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung.groovy</groupId>
-    <artifactId>determine-datatype</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
-    <build>
-        <sourceDirectory>src</sourceDirectory>
-        <plugins>
-            <plugin>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.0</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.codehaus.gmaven</groupId>
-                <artifactId>groovy-maven-plugin</artifactId>
-                <dependencies>
-                    <dependency>
-                        <groupId>org.codehaus.groovy</groupId>
-                        <artifactId>groovy-all</artifactId>
-                        <version>2.0.6</version>
-                    </dependency>
-                </dependencies>
-            </plugin>
-        </plugins>
-    </build>
-    <dependencies>
-        <!-- https://mvnrepository.com/artifact/org.junit/junit5-engine -->
-        <dependency>
-            <groupId>org.junit</groupId>
-            <artifactId>junit5-engine</artifactId>
-            <version>${junit5.version}</version>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <junit5.version>5.0.0-ALPHA</junit5.version>
-    </properties>
-</project>
\ No newline at end of file
diff --git a/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/Person.groovy b/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/Person.groovy
deleted file mode 100644
index 1a89dce435..0000000000
--- a/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/Person.groovy
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.baeldung.groovy.determine.datatype
-
-class Person {
-    
-    private int ageAsInt
-    private Double ageAsDouble
-    private String ageAsString
-    
-    Person() {}
-    Person(int ageAsInt) { this.ageAsInt =  ageAsInt}
-    Person(Double ageAsDouble) { this.ageAsDouble =  ageAsDouble}
-    Person(String ageAsString) { this.ageAsString =  ageAsString}    
-}
-class Student extends Person {}
diff --git a/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/PersonTest.groovy b/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/PersonTest.groovy
deleted file mode 100644
index 56095a3f1b..0000000000
--- a/core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/PersonTest.groovy
+++ /dev/null
@@ -1,55 +0,0 @@
-package com.baeldung.groovy.determine.datatype;
-
-import org.junit.Assert
-import org.junit.Test;
-
-public class PersonTest {
-    
-    @Test
-    public void givenWhenParameterTypeIsInteger_thenReturnTrue() {
-        Person personObj = new Person(10)
-        Assert.assertTrue(personObj.ageAsInt instanceof Integer);
-    }
-    
-    @Test
-    public void givenWhenParameterTypeIsDouble_thenReturnTrue() {
-        Person personObj = new Person(10.0)
-        Assert.assertTrue((personObj.ageAsDouble).getClass() == Double)
-    }
-    
-    @Test
-    public void givenWhenParameterTypeIsString_thenReturnTrue() {
-        Person personObj = new Person("10 years")
-        Assert.assertTrue(personObj.ageAsString.class == String)
-    }
-    
-    @Test
-    public void givenClassName_WhenParameterIsInteger_thenReturnTrue() {
-        Assert.assertTrue(Person.class.getDeclaredField('ageAsInt').type == int.class)
-    }
-    
-    @Test
-    public void givenWhenObjectIsInstanceOfType_thenReturnTrue() {
-        Person personObj = new Person()
-        Assert.assertTrue(personObj instanceof Person)
-    }
-
-    @Test
-    public void givenWhenInstanceIsOfSubtype_thenReturnTrue() {
-        Student studentObj = new Student()
-        Assert.assertTrue(studentObj in Person)
-    }
-    
-    @Test
-    public void givenGroovyList_WhenFindClassName_thenReturnTrue() {
-      def ageList = ['ageAsString','ageAsDouble', 10]   
-      Assert.assertTrue(ageList.class == ArrayList)     
-      Assert.assertTrue(ageList.getClass() == ArrayList)
-    }
-    
-    @Test
-    public void givenGrooyMap_WhenFindClassName_thenReturnTrue() {
-      def ageMap = [ageAsString: '10 years', ageAsDouble: 10.0]
-      Assert.assertFalse(ageMap.class == LinkedHashMap)
-    }
-}
\ No newline at end of file