A simple calculator exposed as Rest API, built with Java 11 using Spring Boot.
Install Java 11 JDK. It can be downloaded from Oracle using the following link: https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html
As with every Spring Boot application, it can be runned in the terminal using the following command ./mvnw spring-boot:run
After that the application can be accessed using the base url http://localhost:8080/calculator
After starting the application the API Documentation with Swagger can be seen here: http://localhost:8080/calculator/swagger-ui.html