I have to classify a certain grade into (A,B,C,D,F), but error message doesn't show up

When the final grade is above 200, i want an error message to show up but it doesn't, i tried to structure my loop that way but it just doesnt work.

import java.util.Scanner;
import java.util.Formatter;
public class Lab3 {

public static void main(String[] args) {

    double midtermGrade = 50.0;
    double homeworkGrade = 0.0;
    double finalExamGrade = 50.0;
    double finalGrade = 0.0;

    char letterGrade = ' ';

    Scanner scan = new Scanner(System.in);

    System.out.println("Enter homework grade: ");
    homeworkGrade = scan.nextDouble();

    System.out.println("Enter midterm exam grade: ");
    midtermGrade = scan.nextDouble();

    System.out.println("Enter final exam grade: ");
    finalExamGrade = scan.nextDouble();

    if ((!(homeworkGrade >= 0) || !(homeworkGrade <= 100))) return;
    if (((midtermGrade >= 0) && (midtermGrade <= 100)))

        if ((((!(finalExamGrade > 0) || !(finalExamGrade < 200))))) {


            finalGrade = (finalExamGrade / 200) * 50 + (midtermGrade * .25) + (homeworkGrade * .25); //.25 denotes 25%
        }
    System.out.println("Invalid input. Homework and midterm grades should be between 0 and 100 and the final grade should be between 0 and 200");


            if (finalGrade >= 50) {

                letterGrade = 'P';

            } else if (finalGrade < 50) {
                letterGrade = 'F';
            }

            if (letterGrade == 'P') {

                System.out.println("Student passed the class");

            } else if (letterGrade == 'F') {
                System.out.println("Student failed the class");
            }

        }


}

When i put the obnoxiously large numbers, i don't get any message. The debug ends.