// HelloWorld.java — your first Java program.
// Run it with:  java HelloWorld.java   (Java 11+ runs a single file directly)
public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello, World!");

        String name = args.length > 0 ? args[0] : "Java learner";
        System.out.println("Welcome, " + name + "!");
    }
}