Background:
Data Studio version 23.01.01 is built on Eclipse version 4.23.  The standard Eclipse download dropped support for Java development in version 4.17. 

The capability to compile Java functions in Data Studio version 23.01.01 and later requires the integration of Java SDK (Software Developer Kit) to replace the java version that is delivered with the product.   This article outlines the instructions of how to implement this integration.

For users who need to develop custom functions, JDK (Java Developer Kit) must be integrated to replace the java version that is delivered with the Workbench for Eclipse installation.  

An example of this integration process for JDK v11 follows below
* Download version 11.0.19 of the JDK from here: [Jira Link: https://adoptium.net/temurin/archive/?version=11] 

 
* Extract the downloaded file. It will have a folder called "jdk-11.0.19+7" inside.
* Replace the contents of <Workbench install_folder>\eclipse\jre folder with the contents of the "jdk-11.0.19+7" folder.