JAVA Runtime Install

Eclipse Temurin OpenJDK 21 Installation Guide

To ensure HUBBOX's world-class Industrial IoT, OT/IT, and 4G/LTE/5G Router solutions transmit data seamlessly, with high performance and security in your industrial network, a 64-bit Java Runtime (JDK) environment is required on your system. In this guide, you will find the step-by-step installation of the Eclipse Temurin OpenJDK 21.0.2+13 (x64) package, which complies with global industrial network standards.

Requirement Info: Automatically defining the JAVA_HOME variable and PATH routes during installation is of critical importance for HUBBOX devices (IoT Gateway, Router, etc.) to operate seamlessly in the background and for the "Plug-and-Play" feature to be active.

Download OpenJDK 21.0.2+13 Installation File (.msi)

Step-by-Step Installation Instructions

1. Launching the Wizard

Run the OpenJDK21U-jdk_x64_windows_hotspot_21.0.2_13.msi file you downloaded. On the setup screen that appears, take the first step of your industrial network connection infrastructure by clicking the Next button to start the process.

Eclipse Temurin JDK 21 Setup Wizard Start Screen

2. Feature Selection and Activating All Components

The components you want to install are listed on the Custom Setup screen. Click on the main component option to ensure the installation is completed seamlessly and that HUBBOX tools (Industrial Network software) can read the system variables correctly.

Eclipse Temurin JDK Feature Selection Menu

Select the "Entire feature will be installed on local hard drive" option from the drop-down menu. This prevents data bottlenecks by ensuring all sub-components of the JDK are installed as a full package on your local disk.

3. Checking JAVA_HOME and PATH Variables

After completing the selection, verify that all icons in the list have become active. To allow HUBBOX hardware to communicate with your system, ensure especially that the following two main features are selected:

PATH Add to PATH: Ensures that Java commands are instantly accessible from the system terminal (CMD/PowerShell).
JAVA_HOME Set JAVA_HOME variable: Minimizes IT/OT integration time by allowing HUBBOX services to automatically detect the Java directory.

Important Note: If the Set JAVA_HOME variable option appears disabled (with a red X icon) in the default settings, you need to click on it and change it to "Will be installed on local hard drive".

OpenJDK Disabled Environment Variable View

4. Completing the Installation

After selecting all sub-features (4/4 subfeatures selected), click the Next and then Install buttons to finish the installation. Once the setup is complete, you can exit the wizard by clicking the Finish button.

Installation Verification Test (Pre-Industrial Connection)

To verify that the installation was successful and the system is ready to communicate with HUBBOX router devices, open the Windows Command Prompt (CMD) and run the following commands:

Java Version Check:

java -version

Expected Output: openjdk version "21.0.2" 2024-01-16 LTS

JAVA_HOME Variable Check:

echo %JAVA_HOME%

Expected Output: C:\\Program Files\\Eclipse Adoptium\\jdk-21.0.2.13-hotspot\\