import java.io.*;

public class Main {

    public static void main(String[] args) {
        System.out.println("Hello world. This is a demo of Greeter");
        // I think I hate me
        Greeter greeter = new Greeter("Fuck you");
        greeter.greet();
    }
}

class Greeter {

    String message;

    // default message
    public Greeter(String message) {
        this.message = message;
    }

    // greet
    public void greet() {
        this.message = getUserInput("What's your message?");
        String name = getUserInput("Who do you want to say that to?");

        // if no message, we heve nothing to relay
        if(this.message == null){
            System.out.println("No messege to relay");
            return;
        }
        
        // if no name, we have no name to relay massage to
        if(name == null){
            System.out.println("No name to relay message to");
            return;
        }

        // else we print message
        System.out.println(message + "! " + name);
    }

    // get user input
    private String getUserInput(String prompt) {
        System.out.print(prompt + ": ");

        try {
            String input = "";
            int i;
            while ((i = System.in.read()) != '\n') {
                input = input + (char) i;
            }
            if (!input.isEmpty()) {
                return input;
            }
        } catch (IOException e) {
            System.err.println("Error reading input");
        }

        return null;
    }
}