Create Maven Projects with Java 11

Posted on 2020-11-05 Edited on 2024-10-15 In Java , Fundamentals

Configuring OS Environments

Configuring Environments on Windows

Add environment variable JAVA_HOME={jdk11_path}.
Add %JAVA_HOME%\bin to the environment variable path.
Verify Java version. $ java -version.
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

Open Project Settings (Ctrl + Shift + Alt + S) –> Project –> Project SDK: 11, Project language level: 11.
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

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