How to install Eclipse Temurin OpenJDK 17 in Ubuntu 22.04 LTS with JAVA_HOME Environment Variable

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java frm

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Published on January 8, 2024 6:13:26 PM ● Video Link: https://www.youtube.com/watch?v=pCqomuX1zRQ

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Tutorial

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In this video we are going to see How to install Eclipse Temurin OpenJDK 17 in Ubuntu 22.04 LTS for all users with JAVA_HOME Environment Variable and How to Compile and Run Java Module Program.

In this Example.
src --- contains two java modules LibrarySort and LibrarySortClient Modules. Each Module must contain module-info.java which is mandatory.
classes --- will store all the compiled class files of Java Modules.

Here LibrarySort Module contains module-info.java which exports the com.javafrm package, so that other modules can access the package and com.javafrm package contains LibrarySort.java .
Class name and Method should be public, then only you can access this class and required methods from other modules.

Next LibrarySortClient Module contains contains module-info.java which requires (calls) LibrarySort Module.
It contains org.javafrm package which contains LibrarySortClient.java (Main class) and access the class and methods from LibrarySort Module.

Example Java Commands:

javac --module LibrarySortModule -d /opt/Java-Module-Programs/Modules/classes --module-source-path /opt/Java-Module-Programs/Modules/src

javac --module LibrarySortClientModule -d /opt/Java-Module-Programs/Modules/classes --module-source-path /opt/Java-Module-Programs/Modules/src

java --module-path /opt/Java-Module-Programs/Modules/classes --module LibrarySortClientModule/org.javafrm.LibrarySortClient

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