How to Resolve Java SecurityException: Mismatched Signer Information?

Java SecurityException: Mismatched Signer Information

When recompiling classes, it's possible to encounter the following error:

java.lang.SecurityException: class "Chinese_English_Dictionary"'s signer information does not match signer information of other classes in the same package

Cause:

This exception occurs when classes belonging to the same package are loaded from multiple JAR files that have been signed with different certificates, or where some JAR files are signed and others are not.

Solution:

• Ensure Consistent Signing: Make sure all JAR files containing classes from the same package are signed using the same certificate.
• Remove Signatures from Unsigned JARs: Alternatively, you can remove the signatures from the manifest files of JAR files that contain overlapping packages with already signed JARs. This allows classes to be loaded without signature mismatches.

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