Merge branch 'eugenp:master' into master

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

@@ -10,8 +10,4 @@
 - [Check if Two Strings Are Rotations of Each Other](https://www.baeldung.com/java-string-check-strings-rotations)
 - [Find the Largest Prime Under the Given Number in Java](https://www.baeldung.com/java-largest-prime-lower-threshold)
 - [Count the Number of Unique Digits in an Integer using Java](https://www.baeldung.com/java-int-count-unique-digits)
-- [Generate Juggler Sequence in Java](https://www.baeldung.com/java-generate-juggler-sequence)
-- [Finding the Parent of a Node in a Binary Search Tree with Java](https://www.baeldung.com/java-find-parent-node-binary-search-tree)
-- [Check if a Number Is a Happy Number in Java](https://www.baeldung.com/java-happy-sad-number-test)
-- [Find the Largest Number Possible After Removing k Digits of a Number](https://www.baeldung.com/java-find-largest-number-remove-k-digits)
 - More articles: [[<-- prev]](/algorithms-miscellaneous-6)

algorithms-modules/algorithms-miscellaneous-7/src/test/java/com/baeldung/algorithms/connect4/README.md

@@ -1,2 +0,0 @@
-## Relevant Articles
-- [Implement Connect 4 Game with Java](https://www.baeldung.com/java-connect-4-game)

algorithms-modules/algorithms-miscellaneous-8/README.md

@@ -1,3 +1,9 @@
 ### Relevant Articles: 
 - [Vigenère Cipher in Java](https://www.baeldung.com/java-vigenere-cipher)
 - [Merge Overlapping Intervals in a Java Collection](https://www.baeldung.com/java-collection-merge-overlapping-intervals)
+- [Generate Juggler Sequence in Java](https://www.baeldung.com/java-generate-juggler-sequence)
+- [Finding the Parent of a Node in a Binary Search Tree with Java](https://www.baeldung.com/java-find-parent-node-binary-search-tree)
+- [Check if a Number Is a Happy Number in Java](https://www.baeldung.com/java-happy-sad-number-test)
+- [Find the Largest Number Possible After Removing k Digits of a Number](https://www.baeldung.com/java-find-largest-number-remove-k-digits)
+- [Implement Connect 4 Game with Java](https://www.baeldung.com/java-connect-4-game)
+- More articles: [[<-- prev]](/algorithms-miscellaneous-7)

algorithms-modules/algorithms-miscellaneous-8/src/main/java/com/baeldung/algorithms/largestNumberRemovingK/LargestNumberRemoveKDigits.java

@@ -1,6 +1,6 @@
 package com.baeldung.algorithms.largestNumberRemovingK;
 
-import java.util.*;
+import java.util.Stack;
 
 public class LargestNumberRemoveKDigits {
     public static int findLargestNumberUsingArithmetic(int num, int k) {

algorithms-modules/algorithms-miscellaneous-8/src/test/java/com/baeldung/algorithms/parentnodebinarytree/BinaryTreeParentNodeFinderUnitTest.java

@@ -5,7 +5,9 @@ import org.junit.jupiter.api.Test;
 
 import java.util.NoSuchElementException;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 class BinaryTreeParentNodeFinderUnitTest {
 

azure/pom.xml

@@ -11,9 +11,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>parent-boot-3</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-2</relativePath>
+        <relativePath>../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>
@@ -98,7 +98,7 @@
                         </property>
                         <property>
                             <name>spring.datasource.password</name>
-                            <value></value>
+                            <value>test</value>
                             <!--<value>replace-with-your-password</value> -->
                         </property>
                     </appSettings>
@@ -113,6 +113,14 @@
                     <!--</resource> -->
                     <!--</resources> -->
                 </configuration>
+                <dependencies>
+                    <!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
+                    <dependency>
+                        <groupId>javax.xml.bind</groupId>
+                        <artifactId>jaxb-api</artifactId>
+                        <version>2.4.0-b180830.0359</version>
+                    </dependency>
+                </dependencies>
             </plugin>
         </plugins>
     </build>

azure/src/main/java/com/baeldung/springboot/azure/User.java

@@ -1,9 +1,9 @@
 package com.baeldung.springboot.azure;
 
-import javax.persistence.Entity;
+import jakarta.persistence.Entity;
-import javax.persistence.GeneratedValue;
+import jakarta.persistence.GeneratedValue;
-import javax.persistence.GenerationType;
+import jakarta.persistence.GenerationType;
-import javax.persistence.Id;
+import jakarta.persistence.Id;
 
 /**
  * @author aiet

core-java-modules/core-java-8-datetime-2/README.md

@@ -9,9 +9,4 @@
 - [Round the Date in Java](https://www.baeldung.com/java-round-the-date)
 - [Representing Furthest Possible Date in Java](https://www.baeldung.com/java-date-represent-max)
 - [Retrieving Unix Time in Java](https://www.baeldung.com/java-retrieve-unix-time)
-- [Calculate Months Between Two Dates in Java](https://www.baeldung.com/java-months-difference-two-dates)
+- [[<-- Prev]](/core-java-modules/core-java-datetime-java8-1) [[Next -->]](/core-java-modules/core-java-8-datetime-3)
-- [Format LocalDate to ISO 8601 With T and Z](https://www.baeldung.com/java-format-localdate-iso-8601-t-z)
-- [Check if Two Date Ranges Overlap](https://www.baeldung.com/java-check-two-date-ranges-overlap)
-- [Difference between ZoneOffset.UTC and ZoneId.of(“UTC”)](https://www.baeldung.com/java-zoneoffset-utc-zoneid-of)
-- [Check if a Given Time Lies Between Two Times Regardless of Date](https://www.baeldung.com/java-check-between-two-times)
-- [[<-- Prev]](/core-java-modules/core-java-datetime-java8-1)

core-java-modules/core-java-8-datetime-3/README.md

@@ -0,0 +1,8 @@
+### Relevant Articles:
+
+- [Calculate Months Between Two Dates in Java](https://www.baeldung.com/java-months-difference-two-dates)
+- [Format LocalDate to ISO 8601 With T and Z](https://www.baeldung.com/java-format-localdate-iso-8601-t-z)
+- [Check if Two Date Ranges Overlap](https://www.baeldung.com/java-check-two-date-ranges-overlap)
+- [Difference between ZoneOffset.UTC and ZoneId.of(“UTC”)](https://www.baeldung.com/java-zoneoffset-utc-zoneid-of)
+- [Check if a Given Time Lies Between Two Times Regardless of Date](https://www.baeldung.com/java-check-between-two-times)
+- [[<-- Prev]](/core-java-modules/core-java-8-datetime-2)

core-java-modules/core-java-8-datetime-3/pom.xml

@@ -0,0 +1,55 @@
+<?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">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-8-datetime-3</artifactId>
+    <packaging>jar</packaging>
+    <name>core-java-8-datetime-3</name>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>joda-time</groupId>
+            <artifactId>joda-time</artifactId>
+            <version>${joda-time.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <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}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <joda-time.version>2.12.5</joda-time.version>
+    </properties>
+
+</project>

core-java-modules/core-java-8-datetime-3/src/main/java/com/baeldung/daterangeoverlap/DateRangeOverlapChecker.java

@@ -1,11 +1,11 @@
 package com.baeldung.daterangeoverlap;
 
-import java.time.LocalDate;
-import java.util.Calendar;
-
 import org.joda.time.DateTime;
 import org.joda.time.Interval;
 
+import java.time.LocalDate;
+import java.util.Calendar;
+
 public class DateRangeOverlapChecker {
 
     public static boolean isOverlapUsingCalendarAndDuration(Calendar start1, Calendar end1, Calendar start2, Calendar end2) {

core-java-modules/core-java-8-datetime-3/src/main/java/com/baeldung/localdatetoiso/LocalDateToISO.java

@@ -1,20 +1,16 @@
 package com.baeldung.localdatetoiso;
 
+import org.apache.commons.lang3.time.FastDateFormat;
+import org.joda.time.DateTimeZone;
+import org.joda.time.format.ISODateTimeFormat;
+
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.time.LocalDate;
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
 import java.util.Date;
-
+import java.util.TimeZone;
-import org.apache.commons.lang3.time.DateFormatUtils;
-
-import org.joda.time.DateTime;
-import org.joda.time.DateTimeZone;
-import org.joda.time.format.DateTimeFormat;
-import org.joda.time.format.ISODateTimeFormat;
-
-import org.apache.commons.lang3.time.FastDateFormat;
 
 public class LocalDateToISO {
     public String formatUsingDateTimeFormatter(LocalDate localDate) {

core-java-modules/core-java-8-datetime-3/src/test/java/com/baeldung/checkiftimebetweentwotimes/CheckIfTimeBetweenTwoTimesUnitTest.java

@@ -1,45 +1,45 @@
-package com.baeldung.checkiftimebetweentwotimes;
+package com.baeldung.checkiftimebetweentwotimes;
-
+
-import org.junit.Test;
+import org.junit.Test;
-
+
-import java.time.LocalTime;
+import java.time.LocalTime;
-import java.util.Calendar;
+import java.util.Calendar;
-import java.util.Date;
+import java.util.Date;
-
+
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertTrue;
-
+
-public class CheckIfTimeBetweenTwoTimesUnitTest {
+public class CheckIfTimeBetweenTwoTimesUnitTest {
-    private LocalTime startTime = LocalTime.parse("09:00:00");
+    private LocalTime startTime = LocalTime.parse("09:00:00");
-    private LocalTime endTime = LocalTime.parse("17:00:00");
+    private LocalTime endTime = LocalTime.parse("17:00:00");
-    private LocalTime targetTime = LocalTime.parse("12:30:00");
+    private LocalTime targetTime = LocalTime.parse("12:30:00");
-
+
-    @Test
+    @Test
-    public void givenLocalTime_whenUsingIsAfterIsBefore_thenTimeIsBetween() {
+    public void givenLocalTime_whenUsingIsAfterIsBefore_thenTimeIsBetween() {
-        assertTrue(!targetTime.isBefore(startTime) && !targetTime.isAfter(endTime));
+        assertTrue(!targetTime.isBefore(startTime) && !targetTime.isAfter(endTime));
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenLocalTime_whenUsingCompareTo_thenTimeIsBetween() {
+    public void givenLocalTime_whenUsingCompareTo_thenTimeIsBetween() {
-        assertTrue(targetTime.compareTo(startTime) >= 0 && targetTime.compareTo(endTime) <= 0);
+        assertTrue(targetTime.compareTo(startTime) >= 0 && targetTime.compareTo(endTime) <= 0);
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDate_whenUsingAfterBefore_thenTimeIsBetween() {
+    public void givenDate_whenUsingAfterBefore_thenTimeIsBetween() {
-        Calendar startCalendar = Calendar.getInstance();
+        Calendar startCalendar = Calendar.getInstance();
-        startCalendar.set(Calendar.HOUR_OF_DAY, 9);
+        startCalendar.set(Calendar.HOUR_OF_DAY, 9);
-        startCalendar.set(Calendar.MINUTE, 0);
+        startCalendar.set(Calendar.MINUTE, 0);
-        Date startTime = startCalendar.getTime();
+        Date startTime = startCalendar.getTime();
-
+
-        Calendar endCalendar = Calendar.getInstance();
+        Calendar endCalendar = Calendar.getInstance();
-        endCalendar.set(Calendar.HOUR_OF_DAY, 17);
+        endCalendar.set(Calendar.HOUR_OF_DAY, 17);
-        endCalendar.set(Calendar.MINUTE, 0);
+        endCalendar.set(Calendar.MINUTE, 0);
-        Date endTime = endCalendar.getTime();
+        Date endTime = endCalendar.getTime();
-
+
-        Calendar targetCalendar = Calendar.getInstance();
+        Calendar targetCalendar = Calendar.getInstance();
-        targetCalendar.set(Calendar.HOUR_OF_DAY, 12);
+        targetCalendar.set(Calendar.HOUR_OF_DAY, 12);
-        targetCalendar.set(Calendar.MINUTE, 30);
+        targetCalendar.set(Calendar.MINUTE, 30);
-        Date targetTime = targetCalendar.getTime();
+        Date targetTime = targetCalendar.getTime();
-
+
-        assertTrue(!targetTime.before(startTime) && !targetTime.after(endTime));
+        assertTrue(!targetTime.before(startTime) && !targetTime.after(endTime));
-    }
+    }
 }

core-java-modules/core-java-8-datetime-3/src/test/java/com/baeldung/daterangeoverlap/DateRangeOverlapCheckerUnitTest.java

@@ -1,13 +1,13 @@
 package com.baeldung.daterangeoverlap;
 
-import static org.junit.Assert.assertFalse;
+import org.joda.time.DateTime;
-import static org.junit.Assert.assertTrue;
+import org.junit.Test;
 
 import java.time.LocalDate;
 import java.util.Calendar;
 
-import org.joda.time.DateTime;
+import static org.junit.Assert.assertFalse;
-import org.junit.Test;
+import static org.junit.Assert.assertTrue;
 
 public class DateRangeOverlapCheckerUnitTest {
 

core-java-modules/core-java-8-datetime-3/src/test/java/com/baeldung/localdatetoiso/LocalDateToISOUnitTest.java

@@ -1,13 +1,14 @@
 package com.baeldung.localdatetoiso;
 
+import org.junit.Test;
+
+import java.time.LocalDate;
+
 import static org.junit.Assert.assertEquals;
 
-import org.junit.Test;
-import java.time.LocalDate;
-
 public class LocalDateToISOUnitTest {
     @Test
-    void givenLocalDate_whenUsingDateTimeFormatter_thenISOFormat(){
+    public void givenLocalDate_whenUsingDateTimeFormatter_thenISOFormat(){
         LocalDateToISO localDateToISO = new LocalDateToISO();
         LocalDate localDate = LocalDate.of(2023, 11, 6);
 
@@ -17,7 +18,7 @@ public class LocalDateToISOUnitTest {
     }
 
     @Test
-    void givenLocalDate_whenUsingSimpleDateFormat_thenISOFormat(){
+    public void givenLocalDate_whenUsingSimpleDateFormat_thenISOFormat(){
         LocalDateToISO localDateToISO = new LocalDateToISO();
         LocalDate localDate = LocalDate.of(2023, 11, 6);
 
@@ -27,17 +28,18 @@ public class LocalDateToISOUnitTest {
     }
 
     @Test
-    void givenLocalDate_whenUsingJodaTime_thenISOFormat() {
+    public void givenLocalDate_whenUsingJodaTime_thenISOFormat() {
         LocalDateToISO localDateToISO = new LocalDateToISO();
         org.joda.time.LocalDate localDate = new org.joda.time.LocalDate(2023, 11, 6);
 
         String expected = "2023-11-06T00:00:00.000Z";
         String actual = localDateToISO.formatUsingJodaTime(localDate);
         assertEquals(expected, actual);
+        assertEquals(expected, actual);
     }
 
     @Test
-    void givenLocalDate_whenUsingApacheCommonsLang_thenISOFormat() {
+    public void givenLocalDate_whenUsingApacheCommonsLang_thenISOFormat() {
         LocalDateToISO localDateToISO = new LocalDateToISO();
         LocalDate localDate = LocalDate.of(2023, 11, 6);
 

core-java-modules/core-java-8-datetime-3/src/test/java/com/baeldung/zoneoffsetandzoneidof/ZoneOffSetAndZoneIdOfUnitTest.java

@@ -1,25 +1,25 @@
-package com.baeldung.zoneoffsetandzoneidof;
+package com.baeldung.zoneoffsetandzoneidof;
-
+
-import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Test;
-
+
-import java.time.OffsetDateTime;
+import java.time.OffsetDateTime;
-import java.time.ZoneId;
+import java.time.ZoneId;
-import java.time.ZoneOffset;
+import java.time.ZoneOffset;
-import java.time.ZonedDateTime;
+import java.time.ZonedDateTime;
-
+
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
-
+
-public class ZoneOffSetAndZoneIdOfUnitTest {
+public class ZoneOffSetAndZoneIdOfUnitTest {
-
+
-    @Test
+    @Test
-    public void givenOffsetDateTimeWithUTCZoneOffset_thenOffsetShouldBeUTC() {
+    public void givenOffsetDateTimeWithUTCZoneOffset_thenOffsetShouldBeUTC() {
-        OffsetDateTime dateTimeWithOffset = OffsetDateTime.now(ZoneOffset.UTC);
+        OffsetDateTime dateTimeWithOffset = OffsetDateTime.now(ZoneOffset.UTC);
-        assertEquals(dateTimeWithOffset.getOffset(), ZoneOffset.UTC);
+        assertEquals(dateTimeWithOffset.getOffset(), ZoneOffset.UTC);
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenZonedDateTimeWithUTCZoneId_thenZoneShouldBeUTC() {
+    public void givenZonedDateTimeWithUTCZoneId_thenZoneShouldBeUTC() {
-        ZonedDateTime zonedDateTime = ZonedDateTime.now(ZoneId.of("UTC"));
+        ZonedDateTime zonedDateTime = ZonedDateTime.now(ZoneId.of("UTC"));
-        assertEquals(zonedDateTime.getZone(), ZoneId.of("UTC"));
+        assertEquals(zonedDateTime.getZone(), ZoneId.of("UTC"));
-    }
+    }
-}
+}

core-java-modules/core-java-io-apis-2/README.md

@@ -12,3 +12,4 @@ This module contains articles about core Java input/output(IO) APIs.
 - [Read Input Character-by-Character in Java](https://www.baeldung.com/java-read-input-character)
 - [Difference Between flush() and close() in Java FileWriter](https://www.baeldung.com/java-filewriter-flush-vs-close)
 - [Get a Path to a Resource in a Java JAR File](https://www.baeldung.com/java-get-path-resource-jar)
+- [Java InputStream vs. InputStreamReader](https://www.baeldung.com/java-inputstream-vs-inputstreamreader)

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

@@ -13,4 +13,3 @@ This module contains articles about core Java input/output(IO) APIs.
 - [Difference Between FileReader and BufferedReader in Java](https://www.baeldung.com/java-filereader-vs-bufferedreader)
 - [Read Multiple Inputs on the Same Line in Java](https://www.baeldung.com/java-read-multiple-inputs-same-line)
 - [Write Console Output to Text File in Java](https://www.baeldung.com/java-write-console-output-file)
-- [Java InputStream vs. InputStreamReader](https://www.baeldung.com/java-inputstream-vs-inputstreamreader)

image-processing/pom.xml

@@ -12,6 +12,13 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
+    <repositories>
+        <repository>
+            <id>maven</id>
+            <url>https://maven.openimaj.org/</url>
+        </repository>
+    </repositories>
+
     <dependencies>
         <dependency>
             <groupId>net.imagej</groupId>

json-modules/gson-2/src/test/java/com/baeldung/gson/polymorphic/Shape.java

@@ -0,0 +1,5 @@
+package com.baeldung.gson.polymorphic;
+
+public interface Shape {
+    double getArea();
+}

json-modules/gson-2/src/test/java/com/baeldung/gson/polymorphic/ShapeTypeAdapter.java

@@ -0,0 +1,27 @@
+package com.baeldung.gson.polymorphic;
+
+import com.google.gson.*;
+
+import java.lang.reflect.Type;
+
+public class ShapeTypeAdapter implements JsonSerializer<Shape>, JsonDeserializer<Shape> {
+    @Override
+    public JsonElement serialize(Shape shape, Type type, JsonSerializationContext context) {
+        JsonElement elem = new Gson().toJsonTree(shape);
+        elem.getAsJsonObject().addProperty("type", shape.getClass().getName());
+        return elem;
+    }
+
+    @Override
+    public Shape deserialize(JsonElement json, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
+        JsonObject jsonObject = json.getAsJsonObject();
+        String typeName = jsonObject.get("type").getAsString();
+
+        try {
+            Class<? extends Shape> cls = (Class<? extends Shape>) Class.forName(typeName);
+            return new Gson().fromJson(json, cls);
+        } catch (ClassNotFoundException e) {
+            throw new JsonParseException(e);
+        }
+    }
+}

json-modules/gson-2/src/test/java/com/baeldung/gson/polymorphic/TypeAdapterUnitTest.java

@@ -0,0 +1,117 @@
+package com.baeldung.gson.polymorphic;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TypeAdapterUnitTest {
+    @Test
+    void testSerialize() {
+        List<Shape> shapes = Arrays.asList(
+                new Circle(4d),
+                new Square(5d)
+        );
+
+        GsonBuilder builder = new GsonBuilder();
+        builder.registerTypeHierarchyAdapter(Shape.class, new ShapeTypeAdapter());
+        Gson gson = builder.create();
+
+        String json = gson.toJson(shapes);
+
+        assertEquals("[" +
+                "{" +
+                    "\"radius\":4.0," +
+                    "\"area\":50.26548245743669," +
+                    "\"type\":\"com.baeldung.gson.polymorphic.TypeAdapterUnitTest$Circle\"" +
+                "},{" +
+                    "\"side\":5.0," +
+                    "\"area\":25.0," +
+                    "\"type\":\"com.baeldung.gson.polymorphic.TypeAdapterUnitTest$Square\"" +
+                "}]", json);
+    }
+
+
+    @Test
+    void testDeserializeWrapper() {
+        List<Shape> shapes = Arrays.asList(
+                new Circle(4d),
+                new Square(5d)
+        );
+
+        GsonBuilder builder = new GsonBuilder();
+        builder.registerTypeHierarchyAdapter(Shape.class, new ShapeTypeAdapter());
+        Gson gson = builder.create();
+
+        String json = gson.toJson(shapes);
+
+        Type collectionType = new TypeToken<List<Shape>>(){}.getType();
+        List<Shape> result = gson.fromJson(json, collectionType);
+
+        assertEquals(shapes, result);
+    }
+
+    private static class Square implements Shape {
+        private final double side;
+        private final double area;
+
+        public Square(double side) {
+            this.side = side;
+            this.area = side * side;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Square square = (Square) o;
+            return Double.compare(square.side, side) == 0 && Double.compare(square.area, area) == 0;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(side, area);
+        }
+    }
+
+    private static class Circle implements Shape {
+        private final double radius;
+
+        private final double area;
+
+        public Circle(double radius) {
+            this.radius = radius;
+            this.area = Math.PI * radius * radius;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Circle circle = (Circle) o;
+            return Double.compare(circle.radius, radius) == 0 && Double.compare(circle.area, area) == 0;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(radius, area);
+        }
+    }
+}

json-modules/gson-2/src/test/java/com/baeldung/gson/polymorphic/TypeFieldUnitTest.java

@@ -0,0 +1,67 @@
+package com.baeldung.gson.polymorphic;
+
+import com.google.gson.Gson;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TypeFieldUnitTest {
+    @Test
+    void testSerialize() {
+        List<Shape> shapes = Arrays.asList(
+                new Circle(4d),
+                new Square(5d)
+        );
+
+        Gson gson = new Gson();
+        String json = gson.toJson(shapes);
+
+        assertEquals("[" +
+                "{" +
+                    "\"type\":\"circle\"," +
+                    "\"radius\":4.0," +
+                    "\"area\":50.26548245743669" +
+                "},{" +
+                    "\"type\":\"square\"," +
+                    "\"side\":5.0," +
+                    "\"area\":25.0" +
+                "}]", json);
+    }
+
+    private static class Square implements Shape {
+        private final String type = "square";
+        private final double side;
+        private final double area;
+
+        public Square(double side) {
+            this.side = side;
+            this.area = side * side;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+    }
+
+    private static class Circle implements Shape {
+        private final String type = "circle";
+        private final double radius;
+
+        private final double area;
+
+        public Circle(double radius) {
+            this.radius = radius;
+            this.area = Math.PI * radius * radius;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+    }
+
+}

json-modules/gson-2/src/test/java/com/baeldung/gson/polymorphic/WrapperUnitTest.java

@@ -0,0 +1,148 @@
+package com.baeldung.gson.polymorphic;
+
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class WrapperUnitTest {
+    @Test
+    void testSerializeWrapper() {
+        List<Wrapper> shapes = Arrays.asList(
+                new Wrapper(new Circle(4d)),
+                new Wrapper(new Square(5d))
+        );
+
+        Gson gson = new Gson();
+        String json = gson.toJson(shapes);
+
+        assertEquals("[" +
+            "{" +
+                "\"circle\":{" +
+                    "\"radius\":4.0," +
+                    "\"area\":50.26548245743669" +
+                "}" +
+            "},{" +
+                "\"square\":{" +
+                    "\"side\":5.0," +
+                    "\"area\":25.0" +
+                "}" +
+            "}]", json);
+    }
+
+    @Test
+    void testDeserializeWrapper() {
+        List<Wrapper> shapes = Arrays.asList(
+                new Wrapper(new Circle(4d)),
+                new Wrapper(new Square(5d))
+        );
+
+        Gson gson = new Gson();
+        String json = gson.toJson(shapes);
+
+        Type collectionType = new TypeToken<List<Wrapper>>(){}.getType();
+        List<Wrapper> result = gson.fromJson(json, collectionType);
+
+        assertEquals(shapes, result);
+    }
+
+    private static class Square implements Shape {
+        private final double side;
+        private final double area;
+
+        public Square(double side) {
+            this.side = side;
+            this.area = side * side;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Square square = (Square) o;
+            return Double.compare(square.side, side) == 0 && Double.compare(square.area, area) == 0;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(side, area);
+        }
+    }
+
+    private static class Circle implements Shape {
+        private final double radius;
+
+        private final double area;
+
+        public Circle(double radius) {
+            this.radius = radius;
+            this.area = Math.PI * radius * radius;
+        }
+
+        @Override
+        public double getArea() {
+            return area;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Circle circle = (Circle) o;
+            return Double.compare(circle.radius, radius) == 0 && Double.compare(circle.area, area) == 0;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(radius, area);
+        }
+    }
+
+    private static class Wrapper {
+        private final Circle circle;
+        private final Square square;
+
+        public Wrapper(Circle circle) {
+            this.circle = circle;
+            this.square = null;
+        }
+
+        public Wrapper(Square square) {
+            this.square = square;
+            this.circle = null;
+        }
+
+        public Circle getCircle() {
+            return circle;
+        }
+
+        public Square getSquare() {
+            return square;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Wrapper wrapper = (Wrapper) o;
+            return Objects.equals(circle, wrapper.circle) && Objects.equals(square, wrapper.square);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(circle, square);
+        }
+    }
+
+}

maven-modules/maven-plugins/jaxws/pom.xml

@@ -36,7 +36,7 @@
         <dependency>
             <groupId>com.sun.xml.ws</groupId>
             <artifactId>jaxws-ri</artifactId>
-            <version>2.3.0</version>
+            <version>${jaxws.version}</version>
             <type>pom</type>
         </dependency>
     </dependencies>
@@ -46,7 +46,7 @@
             <plugin>
                 <groupId>com.sun.xml.ws</groupId>
                 <artifactId>jaxws-maven-plugin</artifactId>
-                <version>4.0.1</version>
+                <version>${jaxws.version}</version>
                 <executions>
                     <execution>
                         <goals>
@@ -73,4 +73,8 @@
         </plugins>
     </build>
 
+    <properties>
+        <jaxws.version>4.0.2</jaxws.version>
+    </properties>
+
 </project>

microservices-modules/msf4j/pom.xml

@@ -14,6 +14,13 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
+    <repositories>
+        <repository>
+            <id>wso2-https</id>
+            <url>https://maven.wso2.org/nexus/content/groups/wso2-public/</url>
+        </repository>
+    </repositories>
+
     <dependencyManagement>
         <dependencies>
             <dependency>
@@ -40,7 +47,7 @@
 
     <properties>
         <microservice.mainClass>com.baeldung.msf4j.msf4jintro.Application</microservice.mainClass>
-        <msf4j.version>2.6.3</msf4j.version>
+        <msf4j.version>2.8.11</msf4j.version>
     </properties>
 
 </project>

spring-boot-modules/spring-boot-3-2/pom.xml

@@ -9,10 +9,9 @@
     <description>Demo project for Spring Boot</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <repositories>

spring-boot-modules/spring-boot-3/pom.xml

@@ -9,10 +9,9 @@
     <description>Demo project for Spring Boot</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-aws/pom.xml

@@ -11,10 +11,9 @@
 
     <!-- "sam build" needs all the dependencies including its parent project. Hence, we cannot use parent-boot in this case -->
     <parent>
-        <groupId>org.springframework.boot</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>3.1.5</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath/>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-basic-customization-3/pom.xml

@@ -9,10 +9,9 @@
     <description>Module For Spring Boot Basic Customization 3</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-data-3/pom.xml

@@ -10,10 +10,9 @@
     <description>spring-boot-data-3</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-groovy/pom.xml

@@ -10,10 +10,9 @@
     <description>Spring Boot Todo Application with Groovy</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-libraries-3/pom.xml

@@ -6,10 +6,9 @@
     <artifactId>spring-boot-libraries-3</artifactId>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-swagger/pom.xml

@@ -10,10 +10,9 @@
     <description>Module For Spring Boot Swagger</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-3</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <relativePath>../../parent-boot-3</relativePath>
+        <version>1.0.0-SNAPSHOT</version>
-        <version>0.0.1-SNAPSHOT</version>
     </parent>
 
     <dependencies>

web-modules/jee-7/pom.xml

@@ -16,6 +16,13 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
+    <repositories>
+        <repository>
+            <id>jboss-https</id>
+            <url>https://repository.jboss.org/nexus/content/groups/public/</url>
+        </repository>
+    </repositories>
+
     <dependencyManagement>
         <dependencies>
             <dependency>