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Split Package Demo

This is a split package demo consisting of four .jar files:

  1. an explicit module org.example.explicit,
  2. an automatic module org.example.automatic,
  3. split-one containing classes in package org.example.split
  4. split-two containing classes in package org.example.split

We can show that the application is able to access classes from split-one as well as split-two if both remain on the classpath (-cp).

However, if these two jars end up as the unnamed module on the module path (-p), the app fails to launch due to both sharing the same package.

Usage

# compile 🛠
mvn clean package

# put split packages on classpath ✅
(cd target/example && java -p mods -cp libs/split-one-1.0.0.jar:libs/split-two-1.0.0.jar -m org.example.explicit/org.example.explicit.Main)

# put split packages on module path ❌
(cd target/example && java -p mods:libs -m org.example.explicit/org.example.explicit.Main)