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sybex-1Z0-816-chapter-6

Code and commands from OCP Oracle Certified Professional Java SE 11 Programmer II Study Guide:: Exam 1Z0-816 by Jeanne Boyarsky and Scott Selikoff

The code in chapter 6 (modules) is a lot of file creation. Additionally, the commands can be hard to type in. Therefore we are providing a repository with the code from the book to facilitate running the examples.

Also see:

Analyzing JDK Dependencies

See the identify-dependencies folder for the code.

Using jdeps

Compile Dino jar

javac zoo/dinos/*.java

Create zoo.dino.jar for Dino module

jar -cvf zoo.dino.jar .

Run jdeps commands

jdeps zoo.dino.jar
jdeps -s zoo.dino.jar
jdeps --jdk-internals zoo.dino.jar

Migrating an Application

See the cyclic-dependencies folder for the code.

Failing to Compile with a Cyclic Dependency

Compile Butterfly module

javac -d butterflyModule butterflyModule/zoo/butterfly/Butterfly.java butterflyModule/module-info.java

Create zoo.butterfly.jar for Butterfly module

jar -cvf mods/zoo.butterfly.jar -C butterflyModule/ .

Compile Caterpillar module

javac -p mods -d caterpillarModule caterpillarModule/zoo/caterpillar/*.java caterpillarModule/module-info.java

Create zoo.caterpillar.jar for Caterpillar module

jar -cvf mods/zoo.caterpillar.jar -C caterpillarModule/ .

Compile Butterfly again to introduce cyclic dependency

javac -p mods -d butterflyModule butterflyModule/zoo/butterfly/Butterfly.java butterflyModule/module-info.java

Creating a Service

See the services folder for the code.

Declaring the Service Provider Interface

Compile service provider interface module

javac -d serviceProviderInterfaceModule serviceProviderInterfaceModule/zoo/tours/api/*.java serviceProviderInterfaceModule/module-info.java

Create zoo.tours.api.jar for the service provider interface module

jar -cvf mods/zoo.tours.api.jar -C serviceProviderInterfaceModule/ .

Creating a Service Locator

Compile service locator module

javac -p mods -d serviceLocatorModule serviceLocatorModule/zoo/tours/reservations/*.java serviceLocatorModule/module-info.java

Create zoo.tours.reservations.jar for the service locator module

jar -cvf mods/zoo.tours.reservations.jar -C serviceLocatorModule/ .

Invoking from a Consumer

Compile consumer module

javac -p mods -d consumerModule consumerModule/zoo/visitor/*.java consumerModule/module-info.java

Create zoo.visitor.jar for the visitor module

jar -cvf mods/zoo.visitor.jar -C consumerModule/ .

Run Tourist class

java -p mods -m zoo.visitor/zoo.visitor.Tourist

Adding a Service Provider

Compile service provider module

javac -p mods -d serviceProviderModule serviceProviderModule/zoo/tours/agency/*.java serviceProviderModule/module-info.java

Create zoo.tours.agency.jar for the service provider module

jar -cvf mods/zoo.tours.agency.jar -C serviceProviderModule/ .

Run Tourist class

java -p mods -m zoo.visitor/zoo.visitor.Tourist

Merging Service Locator and Consumer

Compile multi-purpose module

javac -p mods -d multiPurposeModule multiPurposeModule/zoo/tours/hybrid/*.java multiPurposeModule/module-info.java

Create zoo.tours.hybrid.jar for the multi-purpose module

jar -cvf mods/zoo.tours.hybrid.jar -C multiPurposeModule/ .

Run TourLengthCheck class

java -p mods -m zoo.tours.hybrid/zoo.tours.hybrid.TourLengthCheck