Find which Java version is in use

org.openrewrite.java.migrate.search.AboutJavaVersion

A diagnostic for studying the distribution of Java language version levels (both source and target compatibility across files and source sets).

Recipe source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite.recipe

• artifactId: rewrite-migrate-java

• version: 2.12.0

Options

Type	Name	Description	Example
String	whenUsesType	Optional. Only mark the Java version when this type is in use.	lombok.val

Data Tables (Only available on the Moderne platform)

Java versions by source set

A per-source set view of Java version in use.

Column Name	Description
Project name	The module name (useful especially for multi-module repositories).
Source set name	The source set, e.g. main or test.
Created by	The JDK release that was used to compile the source file.
VM vendor	The vendor of the JVM that was used to compile the source file.
Source compatibility	The source compatibility of the source file.
Major version source compatibility	The major version.
Target compatibility	The target compatibility or --release version of the source file.

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-migrate-java:2.12.0 in your build file or by running a shell command (in which case no build changes are needed):

Gradle

1. Add the following to your build.gradle file:

build.gradle

plugins {
    id("org.openrewrite.rewrite") version("6.12.0")
}

rewrite {
    activeRecipe("org.openrewrite.java.migrate.search.AboutJavaVersion")
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-migrate-java:2.12.0")
}

2. Run gradle rewriteRun to run the recipe.

Gradle init script

1. Create a file named init.gradle in the root of your project.

init.gradle

initscript {
    repositories {
        maven { url "https://plugins.gradle.org/m2" }
    }
    dependencies { classpath("org.openrewrite:plugin:6.12.0") }
}
rootProject {
    plugins.apply(org.openrewrite.gradle.RewritePlugin)
    dependencies {
        rewrite("org.openrewrite.recipe:rewrite-migrate-java:2.12.0")
    }
    rewrite {
        activeRecipe("org.openrewrite.java.migrate.search.AboutJavaVersion")
    }
    afterEvaluate {
        if (repositories.isEmpty()) {
            repositories {
                mavenCentral()
            }
        }
    }
}

2. Run gradle --init-script init.gradle rewriteRun to run the recipe.

Maven POM

1. Add the following to your pom.xml file:

pom.xml

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.29.0</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.java.migrate.search.AboutJavaVersion</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-migrate-java</artifactId>
            <version>2.12.0</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>

2. Run mvn rewrite:run to run the recipe.

Maven Command Line

shell

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-migrate-java:RELEASE -Drewrite.activeRecipes=org.openrewrite.java.migrate.search.AboutJavaVersion

Moderne CLI

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell

mod run . --recipe AboutJavaVersion

See how this recipe works across multiple open-source repositories

The community edition of the Moderne platform enables you to easily run recipes across thousands of open-source repositories.

Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.

Contributors

Jonathan Schneider, Sam Snyder, Tim te Beek