This is the main method. Every application in Ja must contain the main method. The Ja compiler starts executing the code from the main method.
How does it work? Good question. However, we will not discuss it in this article. After all, it's a basic program to introduce Ja programming language to a newbie. We will learn the meaning of public, static, void, and how methods work? in later chapters.
For now, just remember that the main function is the entry point of your Ja application, and it's mandatory in a Ja program. The signature of the main method in Ja is:
public static void main(String[] args) { ... .. ... }