How to Specify the Java Compiler Version in Your pom.xml?

How to Specify the Java Compiler Version in a pom.xml File

The provided Maven code throws numerous errors when run on the command line, including "generics are not supported in -source 1.3" and "annotations are not supported in -source 1.3." To resolve these issues, the Java compiler version needs to be specified in the pom.xml file.

The pom.xml provided in the inquiry does not include any configuration for the Java compiler version. By default, Maven uses the Java version installed on the system. However, in this case, the system Java version appears to be different from the version that is required to compile the code.

To specify the Java compiler version, you need to add the maven-compiler-plugin to the plugin dependency hierarchy of the pom.xml. This plugin can be used to configure various compiler settings, including the source and target versions.

Here is an example of how to configure the Java compiler version in the pom.xml file, using the properties mechanism:

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany</groupId>
    <artifactId>mavenmain</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <!-- ... -->
</project>

In this example, the source and target versions are set to 1.8, which should resolve the compiler errors that you are encountering.

Note that the exact version numbers used in the properties will depend on the specific version of Java that you need to compile the code with.

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