Java InaccessibleObjectException: Unable to access protected method in 'java.lang' module

This error occurs because your code is trying to access a protected method. The class containing the method belongs to a module that hasn't granted access to your current module.

Here are some solutions:

1. Upgrade Your Java Version: This issue was fixed in JDK 9. Upgrading to JDK 9 or later may resolve the problem.

2. Add Command-Line Parameters: Use the --add-opens parameter to grant access to the 'java.lang' module when running your program. For example:

java --add-opens java.base/java.lang=ALL-UNNAMED YourClassName

3. Modify Module Information: If you're in a modular environment, modify the module information to expose the relevant package in 'java.lang' to your current module. Add the following code to your module-info.java file:

open module YourModuleName {
    // ...
    opens java.lang;
    // ...
}

Important: These solutions might compromise security and stability. Avoid direct access to protected methods if possible. Consider alternative solutions.