I don't understand how anyone ever didn't know what this meant. You have a class. It has a static method. The runtime starts your program by calling the method, passing it an array of command-line arguments. What's mysterious about this?
But if you teach people using Java, you have to teach them to write this:
public class Main {
public static void main(String[] args) {
System.out.println("Hello world");
}
}
print "Hello world"
I don't like Java, and the excessive boilerplate is a big part of that opinion. But it was never nearly as arcane as some people here are making it.