Title

import java.util.*;

public class GradeCalculator {
    public static void main(String[] args) {
           Scanner sc = new Scanner(System.in);
        System.out.println("Is the final in the tests category (true/false)?");
        boolean finalIsTest = sc.nextBoolean();
        
        if (finalIsTest) {
            System.out.println("What is your current grade?");
            double grade = sc.nextDouble();
            System.out.println("How much percent of your grade is the tests category?");
            int testsPercent = sc.nextInt();
            System.out.println("What is your current grade (in tests category)?");
            double testsGrade = sc.nextDouble();
            System.out.println("How many points is in the tests category currently?");
            int testsPoints = sc.nextInt();
            System.out.println("How many points is the final?");
            int finalPoints = sc.nextInt();
            System.out.println("What is your desired grade?");
            double desiredGrade = sc.nextDouble();
            
            double percentNeeded = desiredGrade - (grade - testsGrade * testsPercent/100.0);
            double testPointsNeeded = (percentNeeded/testsPercent) * (testsPoints + finalPoints);
            double finalPointsNeeded = testPointsNeeded - testsPoints;
            System.out.println("You need a " + finalPointsNeeded + " on the final.");
            
        } else {
            System.out.println("What is your current grade?");
            double grade = sc.nextDouble(); //wrapper class
            System.out.println("How much percent of your grade is the final?");
            int finalPercent = sc.nextInt();
            System.out.println("What is your desired grade?");
            double target = sc.nextDouble();
            
            double percentNeeded = target - (grade/100.0)*(100.0-finalPercent);
            double gradeNeeded = 100.0 * (percentNeeded/finalPercent);
            System.out.println("You need a " + gradeNeeded + " on the test.");
        }
    }
}