Create Maven Projects with Java 11

Contents

1. 1. Configuring OS Environments
   1. 1.1. Configuring Environments on Windows
2. 2. Configuring Maven Project pom.xml
3. 3. Configuring IDE
   1. 3.1. Configuring Java 11 for IntelliJ IDEA
4. 4. Verification
5. 5. References

Configuring OS Environments

Configuring Environments on Windows

1. Add environment variable JAVA_HOME={jdk11_path}.
2. Add %JAVA_HOME%\bin to the environment variable path.
3. Verify Java version. $ java -version.
4. Restart IDE.

Note: After updating the JAVA_HOME environment variable, you need to restart your IDE.

Configuring Maven Project pom.xml

By default your version of Maven might use an old version of the maven-compiler-plugin that is not compatible with Java 9 or later versions. To target Java 9 or later, you should at least use version 3.6.0 of the maven-compiler-plugin and set the maven.compiler.release property to the Java release you are targetting (e.g. 9, 10, 11, 12, etc.). [1]

<properties>
    <maven.compiler.release>11</maven.compiler.release>
</properties>

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

or

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.1</version>
    <configuration>
        <release>11</release>
    </configuration>
</plugin>

Configuring IDE

Configuring Java 11 for IntelliJ IDEA

1. Open Project Settings (Ctrl + Shift + Alt + S) –> Project –> Project SDK: 11, Project language level: 11.
2. Open Settings (Ctrl + Alt + S) –> Build, Execution, Deployment –> Compiler –> Java Compiler –> Project bytecode version: 11

Verification

Running test

$ mvn test

References

[1] Maven in 5 Minutes