Installation requirements - DigDig is distributed as one *.jar file that does not need to be installed. It is simply copied into a selected destination and run. To run the *.jar file, a standard installation of Java virtual machine (JVM) must be present on the PC and the path to java.exe must be set in the system PATH. According to individual needs, it is also possible to adjust command line parameters of JVM to run the application.
The software is compatible with any recent LTS version of the Java Virtual Machine (JVM). Java is available from multiple distributors; we suggest the Oracle web site. As of August 2025, Oracle offers JDK-24, for example, the Windows installer: Windows OS. However the most recent LTS (long-term support) version is JDK 21.
Users should pay special attention to the versions of Java present on their PC. Often, different versions are present, at least in the form of 32-bit (stored in Program Files (x86) folder for Windows users) and 64-bit (stored in Program Files for Windows users) installations. To check what’s already installed, open the Command Prompt: press the Windows key (or click Start button). Type “cmd” and press Enter.
Then type
java -version
This shows the version of the first Java listed on your system PATH.
To list all Java locations that are currently reachable via PATH, type:
where java
.
Note: this lists only Java installations that are on PATH.
Some Java distributions / installers create the PATH entry during the setup process (Oracle JDK *.exe installer offers a checkbox to update the PATH; Adoptium Temurin (Eclipse Foundation) *.msi installer has option to update PATH and JAVA_HOME; Amazon Corretto *.msi installer updates PATH automatically, etc.). However, if needed, check and adjust your PATH so the preferred Java is found first.
Press the Windows key or click Start, type env and select “Edit the system environment variables”.
In the System Properties window, click Environment Variables…
Select Path from “System variables” window
add a new entry pointing to the bin folder of your preferred Java (e.g., C:\Program Files\Java\jdk-24\bin)
and move it above other Java entries so it takes precedence.
Close all open Command Prompt windows. The updated PATH will be available in any newly opened Command Prompt window. Restart the PC if you want all applications and background services to pick up the changes.
Another possibility how to ensure execution of DigDig using the correct Java is to use a specific command calling specified java executable.
To do that, a simple batch file (*.bat) containing the detailed command can be used. This file can be created in e.g. Notepad. Just copy the text
"C:\Program Files\Java\jdk-24.0\bin\java.exe" -jar DigDig.jar pause
.
paste it into a Notepad and save as e.g. DigDig.bat. Adjust the specified path according to your Java installation/destination.
We recommend adding/using the pause command at the end of your batch file. It keeps the Command Prompt window open so you can review any errors or warnings from data processing.