From 6fcfb0360a36eda7b93d1dc4334633ca71a86f85 Mon Sep 17 00:00:00 2001
From: Ralf Ueberfuhr <ralf.ueberfuhr@yahoo.com>
Date: Fri, 5 Dec 2025 14:31:15 +0100
Subject: [PATCH] BAEL-9373: Add Maven 4 sample

---
 apache-maven-4/pom.xml                        | 82 +++++++++++++++++++
 apache-maven-4/project-a/pom.xml              | 25 ++++++
 .../src/main/java/com/example/App.java        | 13 +++
 apache-maven-4/project-b/pom.xml              | 21 +++++
 .../src/main/java/com/example/App.java        | 12 +++
 .../src/main/java/com/example/Person.java     | 10 +++
 pom.xml                                       |  4 +
 7 files changed, 167 insertions(+)
 create mode 100644 apache-maven-4/pom.xml
 create mode 100644 apache-maven-4/project-a/pom.xml
 create mode 100644 apache-maven-4/project-a/src/main/java/com/example/App.java
 create mode 100644 apache-maven-4/project-b/pom.xml
 create mode 100644 apache-maven-4/project-b/src/main/java/com/example/App.java
 create mode 100644 apache-maven-4/project-b/src/main/java/com/example/Person.java

diff --git a/apache-maven-4/pom.xml b/apache-maven-4/pom.xml
new file mode 100644
index 000000000000..14f151a1fbd2
--- /dev/null
+++ b/apache-maven-4/pom.xml
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project root="true"
+        xmlns="http://maven.apache.org/POM/4.1.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.1.0 http://maven.apache.org/xsd/maven-4.1.0.xsd">
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>apache-maven-4</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.junit</groupId>
+                <artifactId>junit-bom</artifactId>
+                <version>${junit-bom.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.logging.log4j</groupId>
+                <artifactId>log4j-core</artifactId>
+                <version>${log4j-core.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok</artifactId>
+                <version>${lombok.version}</version>
+                <scope>provided</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <type>classpath-processor</type>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <!-- Necessary for the Maven 4 Release Candidate -->
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>${maven-compiler-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>${maven-install-plugin.version}</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>conditional-profile</id>
+            <activation>
+                <condition>
+                    <![CDATA[exists('${project.basedir}/src/**/*.xsd') && length(${user.name}) > 5]]></condition>
+            </activation>
+        </profile>
+    </profiles>
+
+    <properties>
+        <!-- Maven 4 needs 17+ -->
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <junit-bom.version>5.13.4</junit-bom.version>
+        <log4j-core.version>2.24.3</log4j-core.version>
+        <lombok.version>1.18.42</lombok.version>
+        <!-- Necessary for the Maven 4 Release Candidate -->
+        <maven-compiler-plugin.version>4.0.0-beta-3</maven-compiler-plugin.version>
+        <maven-install-plugin.version>4.0.0-beta-2</maven-install-plugin.version>
+    </properties>
+
+</project>
diff --git a/apache-maven-4/project-a/pom.xml b/apache-maven-4/project-a/pom.xml
new file mode 100644
index 000000000000..51945fe6b577
--- /dev/null
+++ b/apache-maven-4/project-a/pom.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project
+        xmlns="http://maven.apache.org/POM/4.1.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.1.0 http://maven.apache.org/xsd/maven-4.1.0.xsd">
+
+    <parent/>
+
+
+    <groupId>com.baeldung.apache-maven-4</groupId>
+    <artifactId>project-a</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/apache-maven-4/project-a/src/main/java/com/example/App.java b/apache-maven-4/project-a/src/main/java/com/example/App.java
new file mode 100644
index 000000000000..8fea7112ec37
--- /dev/null
+++ b/apache-maven-4/project-a/src/main/java/com/example/App.java
@@ -0,0 +1,13 @@
+package com.example;
+
+/**
+ * Hello world!
+ *
+ */
+public class App {
+
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+
+}
diff --git a/apache-maven-4/project-b/pom.xml b/apache-maven-4/project-b/pom.xml
new file mode 100644
index 000000000000..ce330ad7a6e9
--- /dev/null
+++ b/apache-maven-4/project-b/pom.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project
+        xmlns="http://maven.apache.org/POM/4.1.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.1.0 http://maven.apache.org/xsd/maven-4.1.0.xsd">
+
+    <parent/>
+
+
+    <groupId>com.baeldung.apache-maven-4</groupId>
+    <artifactId>project-b</artifactId>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/apache-maven-4/project-b/src/main/java/com/example/App.java b/apache-maven-4/project-b/src/main/java/com/example/App.java
new file mode 100644
index 000000000000..1f0151bd69e6
--- /dev/null
+++ b/apache-maven-4/project-b/src/main/java/com/example/App.java
@@ -0,0 +1,12 @@
+package com.example;
+
+/**
+ * Hello world!
+ *
+ */
+public class App {
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+        new Person().setName("Jack");
+    }
+}
diff --git a/apache-maven-4/project-b/src/main/java/com/example/Person.java b/apache-maven-4/project-b/src/main/java/com/example/Person.java
new file mode 100644
index 000000000000..44fb73736a8c
--- /dev/null
+++ b/apache-maven-4/project-b/src/main/java/com/example/Person.java
@@ -0,0 +1,10 @@
+package com.example;
+
+import lombok.Data;
+
+@Data
+public class Person {
+
+    private String name;
+
+}
diff --git a/pom.xml b/pom.xml
index e50b0aa32e95..a31f368519d4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -550,6 +550,10 @@
             </build>
 
             <modules>
+                <!-- This would need a Maven 4 runtime (RC5) to build successfully -->
+                <!--
+                <module>apache-maven-4</module>
+                -->
                 <module>parent-boot-1</module>
                 <module>parent-boot-2</module>
                 <module>parent-boot-3</module>