Java studies.

Adding Validation I/O package to do data validations, such as @NotBlank, NotNull, Pattern with RegEx, @Past for dates and @Email for valid emails.

Besides that, this new version of the CarsAPI has a all the CRUD methods implemented (POST, GET, UPDATE, DELETE).

For further reference, please consider the following sections:

• Official Apache Maven documentation
• Spring Boot Maven Plugin Reference Guide
• Create an OCI image
• Validation
• Spring Boot DevTools
• Spring Web
• Spring Data JPA

The following guides illustrate how to use some features concretely:

• Validation
• Building a RESTful Web Service
• Serving Web Content with Spring MVC
• Building REST services with Spring
• Accessing Data with JPA