This example shows how to create a command with optional arguments with the annotated approach:

@Command(names = "greet")
public class GreetingCommand implements CommandClass {
    
    @Command(names = "")
    public void run(String name, @OptArg("Mr.") String title) {
        System.out.println("Hello, " + title + " " + name + "!");
    }
    
}

The @OptArg annotation is used to mark an argument as optional, and it accepts a default value as a parameter, which will be used if the argument is not present in the input.

• Executing greet John will print Hello, Mr. John!
• Executing greet John Dr. will print Hello, Dr. John!
• Executing greet John Mr. will print Hello, Mr. John!