To be more specific: copied the complete 'jre' folder (without any adjustments) into the root folder of the Java software. Most of the Java applications I have been trying were database clients.
And that is mainly because of the company DataStax who used to make a GUI application for their Cassandra database product (NoSQL). Cassandra is a welcome addition, because it can store big amounts of data very fast on even (relatively) low-end hardware. Faster than Oracle and SQL Server can manage. Differences between retrieval of data between Oracle, SQL Server and Cassandra are very small on the same hardware.
Anyway, Windows support for their GUI to create/execute queries on modern versions of the Cassandra database software has been dropped without warning. Just for those that are in need of a solution to this crappy treatment of Datastax, The Visual Studio Code editor has a pretty good extension for connecting and creating/executing queries on Cassandra databases. Both can be obtained and used freely. Unfortunately, I had to wade through a lot of solutions that wouldn't work with the latest Cassandra, weren't maintained anymore or actively block access before forking over between 200 USD to 500 USD per license, before I found out that VSCode was able to do this as well.
Not even Oracle is that stingy with their Oracle database client software. And as a company you should really be ashamed about that, because the sales-pitch from Oracle consists of the term "or else....." and the gesture of slitting your throat!).