Here are some question-based article titles that fit the content provided: * How Can I Tell Maven to Use a Specific Java Version? * How to Configure Maven to Use a Specific Java Version on Your Syste

How to Configure Maven to Use a Specific Java Version

When working with Maven on a system with multiple installed Java versions, it can be beneficial to specify which version Maven should use for specific projects. Here's how to configure Maven to utilize a particular Java version:

1. Modifying JAVA_HOME:

Maven relies on the JAVA_HOME environment variable to identify the Java version it should execute. If the configuration you need to change does not allow direct modification of JAVA_HOME, you can make the necessary changes temporarily.

• Before Starting Maven: Set JAVA_HOME to point to the desired Java version before invoking Maven.
• Maven Configuration: Navigate to the mvn script (mvn for non-Windows systems or mvn.bat/mvn.cmd for Windows) and explicitly set JAVA_HOME within the file.

2. Setting MAVEN_OPTS:

You can set the MAVEN_OPTS environment variable to specify the Java version Maven should use. Append the following to your MAVEN_OPTS variable:

-Djava.home=/path/to/desired/Java/home

3. Altering Maven Command Line:

If the environment variables cannot be modified, you can override the Java version in the Maven command itself. For example, to execute Maven using Java 1.7:

bash
JAVA_HOME=/path/to/Java1.7/home mvn <maven-command>

Windows
call "C:\Program Files\Java\jdk1.7.0\bin\java.exe" -Djava.home="C:\Program Files\Java\jdk1.7.0\bin" -jar "C:\path\to\mvn.jar" <maven-command>

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