I try not to use main mathod instead I use @Test, however my class is not running

import org.testng.annotations.Test;

import files.payload; import io.restassured.path.json.JsonPath;

public class sumSum {

@Test
public void sumOFCourses()
{
    JsonPath js = new JsonPath(payload.CoursePrice());
    js.getInt("courses.size()");
    System.out.println("");
}

    

}

console: Error: Main method not found in class sumSum, please define the main method as: public static void main(String[] args) or a JavaFX application class must extend javafx.application.Application