Thread: I need help with these "if" statement and boolean errors

The purpose of this program that I'm writing is to calculate a user's total daily energy expenditure. However, for some reason, it's giving me a ton of errors regarding my boolean operators and "if-else-if" statements. I feel like I'm missing something obvious, could you guys help?:

 
import java.util.Scanner;
public class TDEE
{
    public static void main(String [] args)
    {
        double activityFactor;   
        double TDEE;
        Scanner in = new Scanner(System.in);        
 
 
        System.out.print("Please enter your name: ");
        String firstName = in.next();                    
        String lastName = in.next();
        System.out.println(firstName + " " + lastName);
        System.out.print("Please enter your BMR: ");
        double userBMR = in.nextDouble();
        System.out.println(userBMR);
        System.out.print("Please enter your gender (M/F): ");
        String userGender = in.next();
        System.out.println(userGender);
        System.out.println();
 
        System.out.println("Select your Activity Level");
        System.out.println("[A] Resting (Sleeping, Reclining)");
        System.out.println("[B] Sedentary (Minimal Movement)");
        System.out.println("[C] Light (Sitting, Standing)");
        System.out.println("[D] Moderate (Light Manual Labor, Dancing, Riding Bike)");
        System.out.println("[E] Very Active (Team Sports, Hard Manual Labor)");
        System.out.println("[F] Extremely Active (Full-Time Athlete, Heavy Manual Labor)");
        System.out.println();
        System.out.print("Enter the letter corresponding to your activity level: ");
        String choice = in.next();
        System.out.println(choice);
 
        if(choice.equalsIgnoreCase("A"))                          
        {                                                           
            activityFactor = 1.0;
            TDEE = userBMR * activityFactor;
        }                                                          
        else if (choice.equalsIgnoreCase("B")) 
        {
            activityFactor = 1.3;
            TDEE = userBMR * activityFactor;
        }
        }
        else if (choice.equalsIgnoreCase("C")) && (userGender.equalsIgnoreCase("F"))
        {
            activityFactor = 1.5;
            TDEE = userBMR * activityFactor;
        }
        else if ((choice.equalsIgnoreCase("C")) && (userGender.equalsIgnoreCase("M"))) || ((choice.equalsIgnoreCase("D")) && (userGender.equalsIgnoreCase("F")))
        {
            activityFactor = 1.6;
            TDEE = userBMR * activityFactor;
        }
        else if (choice.equalsIgnoreCase("D")) && (userGender.equalsIgnoreCase("M"))
        {
            activityFactor = 1.7;
            TDEE = userBMR * activityFactor;
        }
        else if (choice.equalsIgnoreCase("E")) && (userGender.equalsIgnoreCase("F"))
        {
            activityFactor = 1.9;
            TDEE = userBMR * activityFactor;
        }
        else if (choice.equalsIgnoreCase("E")) && (userGender.equalsIgnoreCase("M"))
        {
            activityFactor = 2.1;
            TDEE = userBMR * activityFactor;
        }
        else if (choice.equalsIgnoreCase("F")) && (userGender.equalsIgnoreCase("F")) 
        {
            activityFactor = 2.2;
            TDEE = userBMR * activityFactor;
        }
        else if (choice.equalsIgnoreCase("F")) && (userGender.equalsIgnoreCase("M"))
        {
            activityFactor = 2.4;
            TDEE = userBMR * activityFactor;
        }
        else 
        {
            System.out.println("You did not choose a valid menu option!");
        }
        System.out.println();
        System.out.print("Name: " + firstName + " " + lastName);
        System.out.println("     Gender: " + userGender);
        System.out.print("BMR: " + userBMR);
        System.out.println("     Activity Factor: " + activityFactor);
        System.out.print("TDEE: " + TDEE);
 
     }//end of main method
}//end of class

it's giving me a ton of errors

Please copy full text of error messages and paste here.