The primary cause of this error lies in the way Java handles module dependencies and class loading. In Java 9, modules are used to encapsulate code and resources, but they require careful configuration to ensure proper interaction between different components.Another alternative reason is that certa

How do I fix: Configuring Java Modules?

Step 1: Step 1: Use the `--add-modules` option when compiling your application to specify the required dependencies.Step 2: Step 2: Consider using a build tool like Maven or Gradle to manage module dependencies and automate the compilation process.Step 3: Step 3: Review Java documentation for specif

Software⏱️ 3 min read📅 2026-06-03

How to Fix: How to solve InaccessibleObjectException ("Unable to make {member} accessible: module {A} does not 'opens {package}' to {B}") on Java 9?

Q: How do I fix: 🔧 Proven Troubleshooting Steps Resolving Module Dependencies?

Step 1: Step 1: Review your project's module declaration to ensure it accurately reflects the dependencies of your application.Step 2: Step 2: Verify that all required libraries and frameworks are configured correctly in your project's `module-info.java` file.Step 3: Step 3: Check if any incompatibl

Java 9 InaccessibleObjectException error solution.

Quick Answer: Check module declarations in your project's `module-info.java` file to ensure the required package is opened to the unnamed module.

📋 Table of Contents

⚠️ Common Causes
🔧 Proven Troubleshooting Steps
✨ Wrapping Up

The InaccessibleObjectException is a Java-based error that occurs when running an application on Java 9. This exception is commonly encountered by libraries and frameworks such as Spring, Hibernate, and JAXB.

It can manifest in various scenarios, causing frustration for developers trying to resolve the issue.

⚠️ Common Causes

The primary cause of this error lies in the way Java handles module dependencies and class loading. In Java 9, modules are used to encapsulate code and resources, but they require careful configuration to ensure proper interaction between different components.
Another alternative reason is that certain libraries or frameworks may not be compatible with Java 9's new module system.

🔧 Proven Troubleshooting Steps

Resolving Module Dependencies

Step 1: Step 1: Review your project's module declaration to ensure it accurately reflects the dependencies of your application.
Step 2: Step 2: Verify that all required libraries and frameworks are configured correctly in your project's `module-info.java` file.
Step 3: Step 3: Check if any incompatible libraries or frameworks need to be updated or replaced with compatible alternatives.

Configuring Java Modules

Step 1: Step 1: Use the `--add-modules` option when compiling your application to specify the required dependencies.
Step 2: Step 2: Consider using a build tool like Maven or Gradle to manage module dependencies and automate the compilation process.
Step 3: Step 3: Review Java documentation for specific guidance on configuring modules in different scenarios.

✨ Wrapping Up

By following these steps, developers can resolve the InaccessibleObjectException and ensure their applications run smoothly on Java 9. Remember to carefully review your project's module declaration and dependencies to avoid this error in the future.

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