Teach Me Java Auto Generate Unit tests for old J2SE Code

Teach Me Java Auto Generate Unit tests: I am coming back to Java Programming after a long time.... so my knowledge is old... I have Java J2SE & Spring Boot code and I need to auto generate Unit Tests. Because I am learning so like to try out different and see what are the differences.... Here are few I looked at... although you are free to suggest any thing better. [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] I also looked at Selenium.... After you do this work yourself and feel confident, you will guide me to repeat the same. This includes help set up my local Java IDE environment and committing to repository. *** I have downloaded Visual Source Code, Spring STS & Intlli-J.... I do not mind downloading any other that you recommend. *** Apart from unit tests.... what other things do you suggest.... Attached J2SE source code. I will provide the Spring Boot code. *** I also need help in deploying this code on to google cloud. If interested, please bid here: https://www.freelancer.com/projects/java/Java-Code-Deployment-Google-Cloud/details