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Support for Java™ 9

Starting from Red Hat JBoss Developer Studio 11.1, Java™ 9 is now supported.

Please note that Red Hat JBoss Developer Studio does not run on a Java™ 9 virtual machine but allows for managing and building of Java™ 9 projects and artifacts. So, you must first define in your workspace a Java™ 9 JDK if you want to manage and build Java™ 9 projects.

Java™ 9 is here, and JDT fully supports it:

  • The Eclipse compiler for Java (ECJ) implements all the new Java 9 language enhancements.
  • Updated significant features to support Java Modules, such as a compiler, search, and many editor features.

It is not mandatory to run Eclipse with Java Runtime 9 to get the Java 9 support. However, a Java Runtime 9 is required to be on a project’s build path to compile a modular project against the system modules.

  • When a Java Runtime 9 is added to a project’s build path, the system modules are listed under the System library in the package explorer.

Java Runtime 9 package explorer

  • An existing non-modular Java project can be quickly converted to a module by creating a for that project. This feature can be employed once the project has been moved to compliance 9.

Java 9 creating a module info

  • With Java 9 support, a library or a container can now be added to the module path as opposed to the classpath.

Java 9 module path

  • Once a module has been added to a project’s module path, clicking on the IS Modular option and editing the Module properties can further its encapsulation properties. The following example shows how can be made to export its packages in the context of the current Java project.

Java 9 module properties

  • Java search now includes a new search scope - Module.

Java 9 module search


And more…

You can find more updates that are noteworthy on this page.

Last updated: November 9, 2023