Personal Titles

import java.util.Scanner;

public class BiggerNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double age = Double.parseDouble(scanner.nextLine());
        String gender = scanner.nextLine();

        switch (gender) {
            case "m":
                if(age < 16){
                    System.out.println("Master");
                }
                else{
                    System.out.println("Mr.");}
                break;
            case "f":
                if(age < 16){
                    System.out.println("Miss");
                }
                else{
                    System.out.println("Ms.");}
                break;
            default:
                System.out.println("unknown");
        }
    }
}