Lombok getters and setters can’t be accessed on Tests Files [duplicate]

If you’re using Lombok in your Java project and encountering issues where getters or setters aren’t recognized, especially in test classes, this guide will help you resolve it. Lombok simplifies boilerplate code but requires proper setup in both the IDE and Maven.

Step 1: Install Lombok Plugin in IntelliJ IDEA

To enable Lombok in IntelliJ IDEA, you must install its plugin:

1. Open IntelliJ and go to File > Settings > Plugins.
2. Click on Marketplace (or Browse repositories in older versions).
3. Search for Lombok and click Install Plugin.
4. Restart IntelliJ IDEA to apply the changes.

This ensures that IntelliJ can recognize Lombok annotations.

Step 2: Enable Annotation Processing in IntelliJ IDEA

Annotation processing is required for Lombok to generate methods like getters and setters during compilation.

1. Navigate to File > Settings > Build, Execution, Deployment > Compiler > Annotation Processors.
2. Check the box for Enable annotation processing.
3. Apply the changes.

This step fixes most Lombok-related IDE issues.

Step 3: Add the Correct Lombok Dependency to pom.xml

Ensure your Maven project has the correct Lombok dependency configured in pom.xml. Use the following snippet:

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.20</version> <!-- Or the latest compatible version -->
    <scope>provided</scope>
</dependency>

Common Mistake: Avoid lombok-maven-plugin

Some developers mistakenly use the lombok-maven-plugin as a dependency. This is incorrect. You only need the Lombok dependency itself.

Step 4: Configure Maven Compiler Plugin

Ensure that your Maven build recognizes annotation processors by adding or updating the maven-compiler-plugin:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.11.0</version>
            <configuration>
                <source>17</source> <!-- Replace with your Java version -->
                <target>17</target>
            </configuration>
        </plugin>
    </plugins>
</build>

This step ensures Lombok annotations are processed correctly during Maven builds.

Step 5: Clean and Rebuild Your Project

After updating your configuration, clean and rebuild the project to resolve any lingering issues:

mvn clean install

This ensures that all compiled classes include the Lombok-generated methods.

Bonus: Common Problems and Fixes

1. Lombok Annotations Still Not Recognized in Tests:

• Ensure you’ve followed Steps 1 and 2 for IDE configuration.
• Validate that your pom.xml includes the correct dependency.

1. IDE Caching Issues:

• In IntelliJ IDEA, go to File > Invalidate Caches / Restart and restart the IDE.

1. Build Errors Persist:

• Check if any conflicting plugins or dependencies are interfering with Lombok.
• Ensure you’re using a supported version of Lombok for your Java version.

Why This Happens

Lombok uses annotation processing to generate code during compilation. If your IDE or build tool isn’t configured correctly, it won’t recognize these generated methods, leading to errors like cannot find symbol.

By following the steps above, you’ll eliminate this issue and enable Lombok to function seamlessly across your project.

Make Coding Easier

With Lombok configured properly, you’ll save time and avoid boilerplate code, making your development experience smoother and more efficient. Whether you’re working on a large enterprise application or a personal project, Lombok can be a game-changer.

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• “Maven Lombok configuration”
• “Lombok plugin installation IntelliJ”