Скачать или смотреть Resolving Quarkus CLI's Incorrect Java Version for Development: A Guide for Developers

Discover the reasons why the Quarkus CLI may default to Java 11 despite your configuration for Java 17. Learn how to configure the Quarkus CLI to align with Java versions in Maven effectively.
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Resolving Quarkus CLI's Incorrect Java Version for Development: A Guide for Developers

In the world of Java application development, developers often encounter configuration issues that can stem from simple misalignments in their development environment. One common issue occurs when the Quarkus Command Line Interface (CLI) mistakenly picks the wrong Java version for development modes. Specifically, you might find that despite your project being configured to use Java 17, the Quarkus CLI continues to execute using Java 11. This discrepancy can lead to frustrating runtime errors, such as java.lang.UnsupportedClassVersionError, making it critical to align your configurations for a smooth development experience.

The Problem Explained

When running your Quarkus application with commands like quarkus dev or quarkus test, you may encounter errors indicating that the application's Java class files were compiled with a higher Java version than what the runtime environment understands. For instance, if your application is built with Java 17 but the CLI is running on Java 11, you might see errors indicating that certain class files (version 61.0) cannot be loaded because the runtime (version 55.0) only recognizes them up to Java 11.

Why Does This Happen?

The issue arises from how the Quarkus CLI determines which version of the Java runtime (JRE) it uses:

The Quarkus CLI may not automatically align with the version configured in your environment and may default to a globally installed version of Java, often Java 11.

Your environment path settings or configurations within your operating system can directly affect the Java version that the CLI references.

Solution Steps

To resolve the issue and ensure that the Quarkus CLI is aligned with the Java version specified in your Maven configuration, you can follow these steps:

1. Verify Java Installations

Check the Java versions installed on your machine by running:

[[See Video to Reveal this Text or Code Snippet]]

Similarly, run the command below to verify the Java version used by Maven:

[[See Video to Reveal this Text or Code Snippet]]

Confirm that both commands output Java 17, ensuring no discrepancies exist.

2. Check Environment Variables

JAVA_HOME: Ensure that the JAVA_HOME environment variable is set to the directory path of your Java 17 installation.

[[See Video to Reveal this Text or Code Snippet]]

PATH Variable: Confirm that your $PATH variable includes the bin directory of your Java 17 installation before any other installations of Java.

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3. Update Quarkus CLI Configuration

The Quarkus CLI uses a script to determine which java binary it executes based on settings like JAVA_HOME. Investigate the CLI installation directory to access the startup script (shown below) and confirm it's correctly referencing your Java home installation:

[[See Video to Reveal this Text or Code Snippet]]

Ensure this script evaluates the proper JAVA_HOME path.

4. Setting in IDE

For those using an Integrated Development Environment (IDE) like IntelliJ IDEA, ensure:

The project configuration is set to leverage Java 17.

Reconfigure any run configurations to utilize the correct JDK.

5. Attempt Quarkus Commands Again

Once you've confirmed that all the above configurations are set, run the Quarkus commands again:

[[See Video to Reveal this Text or Code Snippet]]

Ensure no errors arise, indicating that your development environment is now consistently using Java 17.

Conclusion

Configuring your development environment correctly is crucial for a smooth development experience. The Quarkus CLI's choice of Java version can sometimes diverge from yo