👀 Views: 227 💬 Answers: 1 📅 Created: 2025-06-22

java reflection modular Java

I'm attempting to set up Could someone explain I'm working on a modular Java application using Java 17's module system, and I'm working with issues with dynamic class loading and reflection. I have a base module that defines an interface, and several implementation modules that provide concrete implementations. When I attempt to load a class dynamically using reflection, I'm getting a `java.lang.ClassNotFoundException` even though the module is defined in my `module-info.java`. Here's what I've tried: I have the following structure: - `base-module`: defines an interface `MyService` - `impl-module-a`: implements `MyService` - `impl-module-b`: implements `MyService` In `base-module/module-info.java`, I have: ```java module base.module { exports com.basemodule; } ``` In `impl-module-a/module-info.java`, I have: ```java module impl.module.a { requires base.module; exports com.implmodulea; } ``` And in my main application, I am trying to load a class like this: ```java String className = "com.implmodulea.MyServiceImplA"; Class<?> clazz = Class.forName(className); MyService myService = (MyService) clazz.getDeclaredConstructor().newInstance(); ``` However, I get the following behavior: ``` java.lang.ClassNotFoundException: com.implmodulea.MyServiceImplA ``` I have also tried using the `ModuleLayer` APIs to ensure that the modules are correctly loaded, but without success. I made sure that all modules are included in the classpath, but still, the reflection fails. Is there a specific reason why the dynamic class loading isn't working in a modular context? Any suggestions on how to properly load classes dynamically in this setup? I'm working with Java in a Docker container on Windows 10. I'm working in a Linux environment. I appreciate any insights! I'd really appreciate any guidance on this.