Java JDK
The Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (javadoc) and other tools needed in Java development.
The Java Development Kit (JDK) is required in order to compile SimStadt or a new SimStadt workflow. The current SimStadt version requires Java 17, and will not compile with older versions.
You can download a full JDK 17 from Liberica.