diff --git a/core-java-modules/core-java-concurrency-simple/pom.xml b/core-java-modules/core-java-concurrency-simple/pom.xml
index bbb65f96d4..159a105035 100644
--- a/core-java-modules/core-java-concurrency-simple/pom.xml
+++ b/core-java-modules/core-java-concurrency-simple/pom.xml
@@ -21,6 +21,22 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source.version}</source>
+                    <target>${maven.compiler.target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
     </build>
 
+    <properties>
+        <maven.compiler.source.version>17</maven.compiler.source.version>
+        <maven.compiler.target.version>17</maven.compiler.target.version>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/BlockedState.java b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/BlockedState.java
index 19c6d08c2d..62a6359a34 100644
--- a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/BlockedState.java
+++ b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/BlockedState.java
@@ -2,8 +2,8 @@ package com.baeldung.concurrent.threadlifecycle;
 
 public class BlockedState {
     public static void main(String[] args) throws InterruptedException {
-        Thread t1 = new Thread(new DemoThreadB());
-        Thread t2 = new Thread(new DemoThreadB());
+        Thread t1 = new Thread(new DemoBlockedRunnable());
+        Thread t2 = new Thread(new DemoBlockedRunnable());
         
         t1.start();
         t2.start();
@@ -15,7 +15,7 @@ public class BlockedState {
     }
 }
 
-class DemoThreadB implements Runnable {
+class DemoBlockedRunnable implements Runnable {
     @Override
     public void run() {
         commonResource();
diff --git a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/TimedWaitingState.java b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/TimedWaitingState.java
index 8d005352eb..1ba9625e93 100644
--- a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/TimedWaitingState.java
+++ b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/TimedWaitingState.java
@@ -2,8 +2,8 @@ package com.baeldung.concurrent.threadlifecycle;
 
 public class TimedWaitingState {
     public static void main(String[] args) throws InterruptedException {
-        DemoThread obj1 = new DemoThread();
-        Thread t1 = new Thread(obj1);
+        DemoTimeWaitingRunnable runnable = new DemoTimeWaitingRunnable();
+        Thread t1 = new Thread(runnable);
         t1.start();
         // The following sleep will give enough time for ThreadScheduler
         // to start processing of thread t1
@@ -12,13 +12,14 @@ public class TimedWaitingState {
     }
 }
 
-class DemoThread implements Runnable {
+class DemoTimeWaitingRunnable implements Runnable {
     @Override
     public void run() {
         try {
             Thread.sleep(5000);
         } catch (InterruptedException e) {
-            Thread.currentThread().interrupt();
+            Thread.currentThread()
+                .interrupt();
             e.printStackTrace();
         }
     }
diff --git a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/WaitingState.java b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/WaitingState.java
index 98a6844309..b5cdbb31db 100644
--- a/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/WaitingState.java
+++ b/core-java-modules/core-java-concurrency-simple/src/main/java/com/baeldung/concurrent/threadlifecycle/WaitingState.java
@@ -9,7 +9,7 @@ public class WaitingState implements Runnable {
     }
 
     public void run() {
-        Thread t2 = new Thread(new DemoThreadWS());
+        Thread t2 = new Thread(new DemoWaitingStateRunnable());
         t2.start();
 
         try {
@@ -21,7 +21,7 @@ public class WaitingState implements Runnable {
     }
 }
 
-class DemoThreadWS implements Runnable {
+class DemoWaitingStateRunnable implements Runnable {
     public void run() {
         try {
             Thread.sleep(1000);
diff --git a/core-java-modules/pom.xml b/core-java-modules/pom.xml
index 7d09e3c0ee..9c562e8b28 100644
--- a/core-java-modules/pom.xml
+++ b/core-java-modules/pom.xml
@@ -41,7 +41,6 @@
         <module>core-java-collections-maps-2</module>
         <module>core-java-collections-maps-3</module>
         <module>core-java-collections-maps-5</module>
-        <module>core-java-concurrency-simple</module>
         <module>core-java-concurrency-2</module>
         <module>core-java-concurrency-advanced</module>
         <module>core-java-concurrency-advanced-2</module>
diff --git a/pom.xml b/pom.xml
index b7c414fb0e..7f35e22bb4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1169,6 +1169,7 @@
                  <module>core-java-modules/core-java-collections-set</module>
                  <module>core-java-modules/core-java-collections-list-4</module>
                  <module>core-java-modules/core-java-collections-maps-4</module>
+                 <module>core-java-modules/core-java-concurrency-simple</module>
                  <module>core-java-modules/core-java-date-operations-1</module>
                  <module>core-java-modules/core-java-datetime-conversion</module>
                  <module>core-java-modules/core-java-datetime-string</module>
@@ -1247,6 +1248,7 @@
                 <module>core-java-modules/core-java-collections-set</module>
                 <module>core-java-modules/core-java-collections-list-4</module>
                 <module>core-java-modules/core-java-collections-maps-4</module>
+                <module>core-java-modules/core-java-concurrency-simple</module>
                 <module>core-java-modules/core-java-date-operations-1</module>
                 <module>core-java-modules/core-java-datetime-conversion</module>
                 <module>core-java-modules/core-java-datetime-string</module>