Why am I getting 'UnsatisfiedLinkError: Can't find dependent libraries' when using JNI?

Addressing JNI's "UnsatisfiedLinkError" for Missing Dependent Libraries

The Java Native Interface (JNI) provides an opportunity to invoke native code from within Java programs. However, encountering an "UnsatisfiedLinkError" can be frustrating, leaving you with the perplexing error message: "Can't find dependent libraries."

Troubleshooting the "UnsatisfiedLinkError"

To resolve this issue, it's crucial to understand the scope of the shared library search path and its independence from the classpath. In Windows environments, the JNI library you're trying to load must either reside in the current working directory or within a directory specified in the Windows PATH environment variable.

Suggested Fixes

1. Verify the Shared Library's Location: Ensure that the libraries required by your native code (e.g., libsndfile, MPR.DLL) are located in the appropriate directories.
2. Resolve Method Name Discrepancies: Ensure that the method names in the JNI library exactly match those defined in the Java header file.
3. Set the System Property (Optional): In Java 8 or later, you can manually set the java.library.path system property to specify the search path for shared libraries.

Reference Materials

For detailed insights into JNI and its specification, consider referring to:

• Oracle's HTML version of the JNI Specification: https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/intro.html
• Bug report on Oracle's forum: https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8021805

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