GenderTitles.java

import java.util.Scanner;

public class GenderTitles
{
	public static void main( String[] args )
	{
		Scanner keyboard = new Scanner(System.in);

		String title;

		System.out.print( "First name: " );
		String first = keyboard.next();
		System.out.print( "Last name: " );
		String last = keyboard.next();
		System.out.print( "Gender (M/F): " );
		String gender = keyboard.next();
		System.out.print( "Age: " );
		int age = keyboard.nextInt();

		if ( age < 20 )
		{
			title = first;
		}
		else
		{
			if ( gender.equals("F") )
			{
				System.out.print( "Are you married, "+first+"? (Y/N): " );
				String married = keyboard.next();
				if ( married.equals("Y") )
				{
					title = "Mrs.";
				}
				else
				{
					title = "Mrs.";
				}
			}
			else
			{
				title = "Mr.";
			}
		}

		System.out.println( "\n" + title + " " + last );

	}
}