How to find out in a Java program which mode is running: console or GUI?

Question

Java

My program is written in Swing (i.e. there are forms that open when the program starts). I also need to run the program in console mode without running these forms. I implemented this using the xvfb program. It launches the program and executes the code, but only what I wrote with System.out.println() or the like is displayed in the console. It is necessary for me to execute one function in the program either on pressing of the button, or at start from the console. I would like to know how to find out which mode is running? (in the program code)

Answer 1

Write 2 implementations and, by the cmd parameter, launch either new Frame or some console one.

Answer 2

https://docs.oracle.com/javase/7/docs/api/java/awt...