Using a build tool like Maven or Gradle is the most maintainable and professional way.

There are many way of shortcut for personal rnd and uses using CMD command prompt:

javac MyApp.java // Compile

java MyApp // Run

java -jar myApp.jar // Run a JAR file

javac -d out src\my\pkg\*.java // Compile to specific folder

OR

jar cfe MyApp.jar my.pkg.MainClass -C out .