Merge branch 'eugenp:master' into jira/BAEL-7374-start-stop-kafka-consumer

algorithms-modules/algorithms-miscellaneous-7/README.md

@@ -6,4 +6,5 @@
 - [Calculate Distance Between Two Coordinates in Java](https://www.baeldung.com/java-find-distance-between-points)
 - [Rotate Arrays in Java](https://www.baeldung.com/java-rotate-arrays)
 - [Find Missing Number From a Given Array in Java](https://www.baeldung.com/java-array-find-missing-number)
+- [Calculate Weighted Mean in Java](https://www.baeldung.com/java-compute-weighted-average)
 - More articles: [[<-- prev]](/algorithms-miscellaneous-6)

algorithms-modules/algorithms-searching/src/main/java/com/baeldung/algorithms/firstnonrepeating/FirstNonRepeatingElement.java

@@ -0,0 +1,61 @@
+package com.baeldung.algorithms.firstnonrepeating;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class FirstNonRepeatingElement {
+    public static Integer findFirstNonRepeatingUsingForLoop(List<Integer> list) {
+        for (int i = 0; i < list.size(); i++) {
+            int current = list.get(i);
+            boolean isRepeating = false;
+            for (int j = 0; j < list.size(); j++) {
+                if (i != j && current == list.get(j)) {
+                    isRepeating = true;
+                    break;
+                }
+            }
+            if (!isRepeating) {
+                return current;
+            }
+        }
+        return null;
+    }
+
+    public static Integer findFirstNonRepeatedElementUsingIndex(List<Integer> list) {
+        for (int i = 0; i < list.size(); i++) {
+            if (list.indexOf(list.get(i)) == list.lastIndexOf(list.get(i))) {
+                return list.get(i);
+            }
+        }
+        return null;
+    }
+
+    public static Integer findFirstNonRepeatingUsingHashMap(List<Integer> list) {
+        Map<Integer, Integer> counts = new HashMap<>();
+        for (int num : list) {
+            counts.put(num, counts.getOrDefault(num, 0) + 1);
+        }
+        for (int num : list) {
+            if (counts.get(num) == 1) {
+                return num;
+            }
+        }
+        return null;
+    }
+
+    public static Integer findFirstNonRepeatingUsingArray(List<Integer> list) {
+        int maxElement = Collections.max(list);
+        int[] frequency = new int[maxElement + 1];
+        for (int num : list) {
+            frequency[num]++;
+        }
+        for (int num : list) {
+            if (frequency[num] == 1) {
+                return num;
+            }
+        }
+        return null;
+    }
+}

algorithms-modules/algorithms-searching/src/test/java/com/baeldung/algorithms/firstnonrepeating/FirstNonRepeatingElementUnitTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.algorithms.firstnonrepeating;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class FirstNonRepeatingElementUnitTest {
+
+    private List<Integer> list;
+
+    @BeforeEach
+    void setUp() {
+        list = Arrays.asList(1, 2, 3, 2, 1, 4, 5, 4);
+    }
+
+    @Test
+    void whenUsingForLoop_thenReturnFirstNonRepeatingElement() {
+        int result = FirstNonRepeatingElement.findFirstNonRepeatingUsingForLoop(list);
+        assertEquals(3, result);
+    }
+
+    @Test
+    void whenUsingIndexOf_thenReturnFirstNonRepeatingElement() {
+        int result = FirstNonRepeatingElement.findFirstNonRepeatedElementUsingIndex(list);
+        assertEquals(3, result);
+    }
+
+    @Test
+    void whenUsingHashMap_thenReturnFirstNonRepeatingElement() {
+        int result = FirstNonRepeatingElement.findFirstNonRepeatingUsingHashMap(list);
+        assertEquals(3, result);
+    }
+
+    @Test
+    void whenUsingArray_thenReturnFirstNonRepeatingElement() {
+        int result = FirstNonRepeatingElement.findFirstNonRepeatingUsingArray(list);
+        assertEquals(3, result);
+    }
+}

core-java-modules/core-java-arrays-operations-advanced-2/src/test/java/com/baeldung/movezerototheend/MoveZeroesToTheEndOfAnArrayUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.movezerototheend;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+public class MoveZeroesToTheEndOfAnArrayUnitTest {
+    private static final int[] EXPECTED = new int[] { 42, 2, 3, 4, 0, 0 };
+
+    @Test
+    void whenCreatingANewArrayAndCopyingValues_thenGetTheExpectedResult() {
+        int[] array = new int[] { 42, 2, 0, 3, 4, 0 };
+        int[] result = new int[array.length];
+        int idx = 0;
+        for (int n : array) {
+            if (n != 0) {
+                result[idx++] = n;
+            }
+        }
+        assertArrayEquals(EXPECTED, result);
+    }
+
+    @Test
+    void whenMovingZeroInTheOriginalArray_thenGetTheExpectedResult() {
+        int[] array = new int[] { 42, 2, 0, 3, 4, 0 };
+        int idx = 0;
+        for (int n : array) {
+            if (n != 0) {
+                array[idx++] = n;
+            }
+        }
+        while (idx < array.length) {
+            array[idx++] = 0;
+        }
+        assertArrayEquals(EXPECTED, array);
+    }
+}

core-java-modules/core-java-concurrency-advanced-5/README.md

@@ -2,3 +2,4 @@
 ### Relevant Articles:
 - [Why wait() Requires Synchronization?](https://www.baeldung.com/java-wait-necessary-synchronization)
 - [Working with Exceptions in Java CompletableFuture](https://www.baeldung.com/java-exceptions-completablefuture)
+- [CountDownLatch vs. Semaphore](https://www.baeldung.com/java-countdownlatch-vs-semaphore)

core-java-modules/core-java-date-operations-4/src/test/java/com/baeldung/datetounixtimestamp/DateToUnixTimeStampUnitTest.java

@@ -0,0 +1,65 @@
+package com.baeldung.datetounixtimestamp;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+import org.joda.time.DateTime;
+import org.junit.jupiter.api.Test;
+
+class DateToUnixTimeStampUnitTest {
+
+    @Test
+    void givenDate_whenUsingInstantClass_thenConvertToUnixTimeStamp() {
+        Instant givenDate = Instant.parse("2020-09-08T12:16:40Z");
+
+        assertEquals(1599567400L, givenDate.getEpochSecond());
+    }
+
+    @Test
+    void givenDate_whenUsingLocalDateTimeClass_thenConvertToUnixTimeStamp() {
+        LocalDateTime givenDate = LocalDateTime.of(2023, 10, 19, 22, 45);
+
+        assertEquals(1697755500L, givenDate.toEpochSecond(ZoneOffset.UTC));
+    }
+
+    @Test
+    void givenDate_whenUsingDateClass_thenConvertToUnixTimeStamp() throws ParseException {
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+        Date givenDate = dateFormat.parse("2023-10-15 22:00:00");
+
+        assertEquals(1697407200L, givenDate.getTime() / 1000);
+    }
+
+    @Test
+    void givenDate_whenUsingCalendarClass_thenConvertToUnixTimeStamp() {
+        Calendar calendar = new GregorianCalendar(2023, Calendar.OCTOBER, 17);
+        calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        assertEquals(1697500800L, calendar.getTimeInMillis() / 1000);
+    }
+
+    @Test
+    void givenDate_whenUsingJodaTimeInstantClass_thenConvertToUnixTimeStamp() {
+        org.joda.time.Instant givenDate = org.joda.time.Instant.parse("2020-09-08T12:16:40Z");
+
+        assertEquals(1599567400L, givenDate.getMillis() / 1000);
+    }
+
+    @Test
+    void givenDate_whenUsingJodaTimeDateTimeClass_thenConvertToUnixTimeStamp() {
+        DateTime givenDate = new DateTime("2020-09-09T12:16:40Z");
+
+        assertEquals(1599653800L, givenDate.getMillis() / 1000);
+    }
+
+}

core-java-modules/core-java-datetime-conversion-2/README.md

@@ -4,3 +4,4 @@ This module contains articles about converting between Java date and time object
 
 ### Relevant Articles: 
 - [Convert Gregorian to Hijri Date in Java](https://www.baeldung.com/java-date-gregorian-hijri-conversion)
+- [Convert String Date to XMLGregorianCalendar in Java](https://www.baeldung.com/java-string-date-xmlgregoriancalendar-conversion)

core-java-modules/core-java-io-5/README.md

@@ -8,5 +8,6 @@ This module contains articles about core Java input and output (IO)
 - [Difference Between ZipFile and ZipInputStream in Java](https://www.baeldung.com/java-zipfile-vs-zipinputstream)
 - [How to Write Strings to OutputStream in Java](https://www.baeldung.com/java-write-string-outputstream)
 - [Read a File and Split It Into Multiple Files in Java](https://www.baeldung.com/java-read-file-split-into-several)
+- [Read and Write Files in Java Using Separate Threads](https://www.baeldung.com/java-read-write-files-different-threads)
 - [[<-- Prev]](/core-java-modules/core-java-io-4)
 

core-java-modules/core-java-lang-oop-patterns/src/main/java/com/baeldung/objectmutability/ImmutablePerson.java

@@ -0,0 +1,21 @@
+package com.baeldung.objectmutability;
+
+public final class ImmutablePerson {
+
+    private final String name;
+    private final int age;
+
+    public ImmutablePerson(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}
+

core-java-modules/core-java-lang-oop-patterns/src/test/java/com/baeldung/objectmutability/ImmutableObjectExamplesUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.objectmutability;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+
+public class ImmutableObjectExamplesUnitTest {
+
+    @Test
+    public void givenImmutableString_whenConcatString_thenNotSameAndCorrectValues() {
+        String originalString = "Hello";
+        String modifiedString = originalString.concat(" World");
+
+        assertNotSame(originalString, modifiedString);
+
+        assertEquals("Hello", originalString);
+        assertEquals("Hello World", modifiedString);
+    }
+
+    @Test
+    public void givenImmutableInteger_whenAddInteger_thenNotSameAndCorrectValue() {
+        Integer immutableInt = 42;
+        Integer modifiedInt = immutableInt + 8;
+
+        assertNotSame(immutableInt, modifiedInt);
+
+        assertEquals(42, (int) immutableInt);
+        assertEquals(50, (int) modifiedInt);
+    }
+}
+
+

core-java-modules/core-java-lang-oop-patterns/src/test/java/com/baeldung/objectmutability/ImmutablePersonUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.objectmutability;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ImmutablePersonUnitTest {
+
+    @Test
+    public void givenImmutablePerson_whenAccessFields_thenCorrectValues() {
+        ImmutablePerson person = new ImmutablePerson("John", 30);
+
+        assertEquals("John", person.getName());
+        assertEquals(30, person.getAge());
+    }
+}
+

core-java-modules/core-java-lang-oop-patterns/src/test/java/com/baeldung/objectmutability/MutableObjectExamplesUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.objectmutability;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class MutableObjectExamplesUnitTest {
+
+    @Test
+    public void givenMutableString_whenAppendElement_thenCorrectValue() {
+        StringBuilder mutableString = new StringBuilder("Hello");
+        mutableString.append(" World");
+
+        assertEquals("Hello World", mutableString.toString());
+    }
+
+    @Test
+    public void givenMutableList_whenAddElement_thenCorrectSize() {
+        List<String> mutableList = new ArrayList<>();
+        mutableList.add("Java");
+
+        assertEquals(1, mutableList.size());
+    }
+}
+

core-java-modules/core-java-networking-4/README.md

@@ -5,3 +5,4 @@
 - [Download a Webpage in Java](https://www.baeldung.com/java-download-webpage)
 - [URL Query Manipulation in Java](https://www.baeldung.com/java-url-query-manipulation)
 - [Understanding the java.net.SocketException Broken Pipe Error](https://www.baeldung.com/java-socketexception-broken-pipe-error)
+- [Normalize a URL in Java](https://www.baeldung.com/java-url-normalization)

core-java-modules/core-java-numbers-7/README.md

@@ -2,3 +2,4 @@
 - [Check if a double Is an Integer in Java](https://www.baeldung.com/java-check-double-integer)
 - [Print a Double Value Without Scientific Notation in Java](https://www.baeldung.com/java-print-double-number-no-scientific-notation)
 - [Check if a Float Value is Equivalent to an Integer Value in Java](https://www.baeldung.com/java-float-integer-equal)
+- [Generating Unique Positive Long Using SecureRandom in Java](https://www.baeldung.com/java-securerandom-generate-positive-long)

core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/securerandompositivelong/SecureRandomPositiveLongUnitTest.java

@@ -0,0 +1,18 @@
+package com.baeldung.securerandompositivelong;
+
+import org.junit.jupiter.api.Test;
+
+import java.security.SecureRandom;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class SecureRandomPositiveLongUnitTest {
+
+    @Test
+    void whenGenerateRandomPositiveLong_thenGetPositiveValue() {
+        SecureRandom secureRandom = new SecureRandom();
+        long randomPositiveLong = Math.abs(secureRandom.nextLong());
+
+        assertThat(randomPositiveLong).isNotNegative();
+    }
+}

core-java-modules/core-java-perf-2/README.md

@@ -6,3 +6,5 @@ This module contains articles about performance of Java applications
 - [External Debugging With JMXTerm](https://www.baeldung.com/java-jmxterm-external-debugging)
 - [Create and Detect Memory Leaks in Java](https://www.baeldung.com/java-create-detect-memory-leaks)
 - [Differences Between Heap Dump, Thread Dump and Core Dump](https://www.baeldung.com/java-heap-thread-core-dumps)
+- [Shutting Down on OutOfMemoryError in Java](https://www.baeldung.com/java-shutting-down-outofmemoryerror)
+

core-java-modules/core-java-reflection-3/README.md

@@ -1,2 +1,3 @@
 ### Relevant Articles:
 - [Is Java Reflection Bad Practice?](https://www.baeldung.com/java-reflection-benefits-drawbacks)
+- [Instantiate an Inner Class With Reflection in Java](https://www.baeldung.com/java-reflection-instantiate-inner-class)

core-java-modules/core-java-string-algorithms-4/README.md

@@ -5,3 +5,4 @@ This module contains articles about string-related algorithms.
 ### Relevant Articles:
 - [Rotating a Java String By n Characters](https://www.baeldung.com/java-rotate-string-by-n-characters)
 - [Remove Characters From a String That Are in the Other String](https://www.baeldung.com/java-strings-character-difference)
+- [Run-Length Encoding and Decoding in Java](https://www.baeldung.com/java-rle-compression)

core-java-modules/core-java-uuid/README.md

@@ -7,3 +7,4 @@
 - [Generate the Same UUID From a String in Java](https://www.baeldung.com/java-generate-same-uuid-from-string)
 - [Generating Time Based UUIDs](https://www.baeldung.com/java-generating-time-based-uuids)
 - [Generating Unique Positive long Using UUID in Java](https://www.baeldung.com/java-uuid-unique-long-generation)
+- [Storing UUID as Base64 String in Java](https://www.baeldung.com/java-store-uuid-base64-string)

core-java-modules/pom.xml

@@ -60,6 +60,7 @@
         <module>core-java-methods</module>
         <module>core-java-networking-3</module>
         <module>core-java-os</module>
+        <module>core-java-os-2</module>
         <module>core-java-perf-2</module>
         <module>core-java-streams-4</module>
         <module>core-java-streams-5</module>

deeplearning4j/pom.xml

@@ -55,14 +55,12 @@
             <artifactId>httpclient</artifactId>
             <version>${httpclient.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-
     </dependencies>
 
     <properties>

di-modules/avaje/pom.xml

@@ -14,14 +14,12 @@
             <artifactId>avaje-inject</artifactId>
             <version>${avaje.inject.version}</version>
         </dependency>
-
         <dependency>
             <groupId>io.avaje</groupId>
             <artifactId>avaje-inject-test</artifactId>
             <version>${avaje.inject.version}</version>
             <scope>test</scope>
         </dependency>
-
         <!-- Annotation processors -->
         <dependency>
             <groupId>io.avaje</groupId>

kubernetes-modules/k8s-operator/pom.xml

@@ -1,8 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <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">
+    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>k8s-operator</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>k8s-operator</name>
+    <packaging>jar</packaging>
 
     <parent>
         <groupId>com.baeldung</groupId>
@@ -11,30 +15,12 @@
         <relativePath>./../../parent-boot-3</relativePath>
     </parent>
 
-    <artifactId>k8s-operator</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <name>k8s-operator</name>
-    <packaging>jar</packaging>
-
-    <properties>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
-        <josdk.version>4.6.0</josdk.version>
-        <fabric8-client.version>6.9.2</fabric8-client.version>
-        <bouncycastle.version>1.77</bouncycastle.version>
-        <slf4j.version>2.0.9</slf4j.version>
-        <operator-framework-spring-boot.version>5.4.0</operator-framework-spring-boot.version>
-    </properties>
-
-
     <dependencies>
-
         <dependency>
             <groupId>io.javaoperatorsdk</groupId>
             <artifactId>operator-framework-spring-boot-starter</artifactId>
             <version>${operator-framework-spring-boot.version}</version>
         </dependency>
-
         <dependency>
             <groupId>io.javaoperatorsdk</groupId>
             <artifactId>operator-framework-spring-boot-starter-test</artifactId>
@@ -47,49 +33,42 @@
                 </exclusion>
             </exclusions>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-webflux</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
             <optional>true</optional>
         </dependency>
-
         <dependency>
             <groupId>io.fabric8</groupId>
             <artifactId>crd-generator-apt</artifactId>
             <version>${fabric8-client.version}</version>
             <scope>provided</scope>
         </dependency>
-
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk18on</artifactId>
             <version>${bouncycastle.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcpkix-jdk18on</artifactId>
             <version>${bouncycastle.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.awaitility</groupId>
             <artifactId>awaitility</artifactId>
             <scope>test</scope>
         </dependency>
-
     </dependencies>
+
     <build>
         <plugins>
             <plugin>
@@ -108,4 +87,14 @@
         </plugins>
     </build>
 
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <josdk.version>4.6.0</josdk.version>
+        <fabric8-client.version>6.9.2</fabric8-client.version>
+        <bouncycastle.version>1.77</bouncycastle.version>
+        <slf4j.version>2.0.9</slf4j.version>
+        <operator-framework-spring-boot.version>5.4.0</operator-framework-spring-boot.version>
+    </properties>
+
 </project>

kubernetes-modules/pom.xml

@@ -18,7 +18,7 @@
         <module>k8s-admission-controller</module>
         <module>kubernetes-spring</module>
         <module>k8s-java-heap-dump</module>
-		<module>k8s-operator</module>
+        <module>k8s-operator</module>
     </modules>
 
 </project>

libraries-3/pom.xml

@@ -167,7 +167,6 @@
         </resources>
     </build>
 
-
     <properties>
         <jcabi-aspects.version>0.22.6</jcabi-aspects.version>
         <aspectjrt.version>1.9.20.1</aspectjrt.version>

libraries-bytecode/pom.xml

@@ -41,6 +41,7 @@
             <version>${asm.version}</version>
         </dependency>
     </dependencies>
+
     <build>
         <plugins>
             <plugin>

logging-modules/logging-techniques/pom.xml

@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <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">
+    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>logging-techniques</artifactId>
+
     <parent>
         <artifactId>logging-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>logging-techniques</artifactId>
 
     <dependencies>
         <dependency>

lombok-modules/lombok-2/pom.xml

@@ -55,6 +55,7 @@
             <version>${validation-api.version}</version>
         </dependency>
     </dependencies>
+
     <build>
         <plugins>
             <plugin>
@@ -82,6 +83,7 @@
             </plugin>
         </plugins>
     </build>
+
     <properties>
         <openapi.version>7.1.0</openapi.version>
         <gson.version>2.10.1</gson.version>

maven-modules/dependency-exclusion/pom.xml

@@ -14,15 +14,21 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <properties>
-        <surefire-version>2.22.2</surefire-version>
-    </properties>
-
     <modules>
         <module>dummy-surefire-junit47</module>
         <module>core-java-exclusions</module>
     </modules>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>${junit.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <build>
         <pluginManagement>
             <plugins>
@@ -57,14 +63,8 @@
         </pluginManagement>
     </build>
 
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>junit</groupId>
-                <artifactId>junit</artifactId>
-                <version>${junit.version}</version>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
+    <properties>
+        <surefire-version>2.22.2</surefire-version>
+    </properties>
 
 </project>

maven-modules/maven-reactor/patient-data/pom.xml

@@ -5,11 +5,13 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>patient-data</artifactId>
     <name>patient-data</name>
+
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>maven-reactor</artifactId>
         <version>1.0-SNAPSHOT</version>
     </parent>
+
     <dependencies>
         <dependency>
             <groupId>com.baeldung</groupId>
@@ -17,4 +19,5 @@
             <version>1.0-SNAPSHOT</version>
         </dependency>
     </dependencies>
+
 </project>