How to install OpenJDK 21 in Manjaro Linux 23 with JAVA_HOME Environment Variable

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java frm

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Published on January 12, 2024 10:18:19 AM ● Video Link: https://www.youtube.com/watch?v=5MPnhzWzhJE

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Tutorial

Duration: 7:33

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In this video we are going to see How to install OpenJDK 21 in Manjaro Linux 23 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 DescendingSort and DescendingSortClient Modules. Each Module must contain module-info.java which is mandatory.
classes --- will store all the compiled class files of Java Modules.

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

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

Example Java Commands:

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

javac --module DescendingClientModule -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 DescendingClientModule/org.javafrm.DescendingSortClient

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