tasks.named<Test>("test") {
    useJUnitPlatform()                                              // <7>
}
----
<1> Apply the application plugin to add support for building a CLI application in Java.
<2> Use Maven Central for resolving dependencies.
<3> Use JUnit Jupiter for testing (using the version catalog).
<4> This dependency is used by the application (referred using the version catalog).
<5> Define the toolchain version.

        DefaultSession session = new DefaultSession(
                rsession,
                system,
                List.of(lookup.lookup(RepositoryFactory.class)
                        .createRemote("central", "https://repo.maven.apache.org/maven2")),
                null,
                lookup);

        Settings settings = session.getService(SettingsBuilder.class)
                .build(

public class DefaultRepositoryHandler extends DefaultArtifactRepositoryContainer implements RepositoryHandlerInternal {

    public static final String GRADLE_PLUGIN_PORTAL_REPO_NAME = "Gradle Central Plugin Repository";
    public static final String DEFAULT_BINTRAY_JCENTER_REPO_NAME = "BintrayJCenter";
    public static final String BINTRAY_JCENTER_URL = "https://jcenter.bintray.com/";

    }

    private static String getPluginRepositoriesDisplayName() {
        return gradleVersion >= GradleVersion.version("4.4")
            ? "Plugin Repositories"
            : "Gradle Central Plugin Repository"
    }

        static errorProne = "3.1.0"

        // https://plugins.gradle.org/plugin/com.google.protobuf
        static protobufPlugin = "0.9.4"

        // https://central.sonatype.com/artifact/com.google.protobuf/protobuf-java/versions
        static protobufTools = "4.26.1"

        // https://plugins.gradle.org/plugin/org.gradle.test-retry
        static testRetryPlugin = "1.5.8"

                    .relocation(model.getDistributionManagement().getRelocation())
                    .build());
        }
        // only keep repositories other than 'central'
        builder.pluginRepositories(pruneRepositories(model.getPluginRepositories()));
        builder.repositories(pruneRepositories(model.getRepositories()));
        return builder;
    }

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.Set;

/**
 * Provides a central location for handling failures encountered during
 * each stage of the variant selection process during dependency resolution.
 *
 * All variant selection failures encountered during selection by the {@link GraphVariantSelector} or

            "java-library");
    }

    private void addMavenCentral(BuildScriptBuilder buildScriptBuilder) {
        buildScriptBuilder.repositories().mavenCentral("Use Maven Central for resolving dependencies.");
    }

    private void addStandardDependencies(BuildScriptBuilder buildScriptBuilder, boolean constraintsDefined) {
        switch (getLanguage()) {
            case GROOVY:

    def "gradle ignores maven mirror configuration for uploading archives"() {
        given:
        m2.globalSettingsFile << """
<settings>
  <mirrors>
    <mirror>
      <id>ACME</id>
      <name>ACME Central</name>
      <url>http://acme.maven.org/maven2</url>
      <mirrorOf>*</mirrorOf>
    </mirror>
  </mirrors>
</settings>
"""

        and:
        settingsFile << "rootProject.name = 'root'"

include::sample[dir="snippets/java-library/module/groovy",files="build.gradle[tags=declareVersion]"]
====

=== Using libraries that are not modules

You probably want to use external libraries, like OSS libraries from Maven Central, in your modular Java project.
Some libraries, in their newer versions, are already full modules with a module descriptor.
For example, `com.google.code.gson:gson:2.8.9` that has the module name `com.google.gson`.