Upgrade Java 8 Maven and Gradle projects to Java 11 with JPMS migration and API modernization.
npx skills add https://github.com/brunoborges/gh-appmod --skill java-8-to-11
Please help me install this Agent Skill. Skill: java-8-to-11 Source: https://github.com/brunoborges/gh-appmod/tree/main/skills/java-8-to-11 Command: npx skills add https://github.com/brunoborges/gh-appmod --skill java-8-to-11
Upgrading Java projects from JDK 8 to JDK 11, addressing module system changes, removal of Java EE modules, and modern language and API updates to reduce risk and manual toil.
Initiate a Java 11 upgrade by following this guide and begin refactoring with JPMS, HttpClient adoption, and modernized collections.
High-intent search queries and answers about installing and using this skill.
Migrating a Java 8 project to Java 11 involves applying repeatable steps for JPMS migration, removing Java EE modules, and modernizing APIs with var, HttpClient, and collection factory methods. This reduces manual toil and addresses module-system changes.
In Java 11, JAXB and JAX-WS were removed as Java EE modules and must be replaced with standalone dependencies. This migration requires updating your Maven or Gradle toolchain and adding external libraries to satisfy the removed module requirements.
Java 11 migration does not strictly require a module-info.java file, but JPMS migration guidance involves module-info.java considerations, encapsulation, and open exports. You can adopt the module system incrementally while upgrading your application.
Modernize your Java code by adopting local-variable type inference using var, utilizing the new HttpClient API, and implementing collection factory methods. These language and API updates are part of standard Java 11 upgrade practices to modernize legacy codebases.
Yes, you can upgrade a Gradle project from Java 8 to Java 11. The migration process applies to both Maven and Gradle projects, handling toolchain compatibility, test framework upgrades, and dependency replacements for removed Java EE modules.
Limitations of upgrading to Java 11 include managing the removal of Java EE modules like JAXB and JTA, resolving JPMS encapsulation issues, and ensuring strict runtime constraints are met. Teams with tight delivery timelines must carefully handle these dependencies.
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