I'm trying to take an ArrayList that has letter grades in it and run it through an if loop to see how many study hours a student needs. Then I would take those study hours and append/write to a new list.

This is what I have so far:

import java.util.ArrayList; import java.util.Scanner; import java.io.*;

public class Project1ReVistC {

public static void main( String [ ] args ) throws FileNotFoundException { MenuOptionB(); }// End of main method3 public static void MenuOptionB() throws FileNotFoundException { File file = new File("Grades.txt"); File fileOut = new File("StudentsHoursGrades.txt"); Scanner scan = new Scanner(file); Scanner in = new Scanner(System.in); PrintWriter out = new PrintWriter(fileOut); ArrayList lines1 = new ArrayList<>(); int [] lines2; ArrayList lines3 = new ArrayList<>(); while(scan.hasNextLine()){ //reading the line from the file String line1 = scan.nextLine(); System.out.println(line1); //Ask user if they want to change information System.out.println("Dose this name need to be corrected? 1-yes,any other number-no: "); //Give the user a choice int choice = Integer.parseInt(in.nextLine()); if(choice == 1){ //asking the user to enter a new line System.out.println("Enter a replacement : "); String string = in.nextLine(); //adding to the list lines1.add(string); }//End of if statement else{ //adding the old line to the list lines1.add(line1); }//End of else statement

//Reads credits line in file and displays it String line2 = scan.nextLine(); System.out.println(line2); //Ask user if they want to change information System.out.println("Are these credits disable by 3 and under 15? 1-yes,any other number-no: "); //Give the user a choice int choice = Integer.parseInt(in.nextLine()); if(choice == 1){ //asking the user to enter a new line System.out.println("Enter a replacement : "); String string = in.nextLine(); //adding to the list lines2.add(sting); }//End of if statement else{ //adding the old line to the list lines2.add(line2); }//End of else statement //Reads grade line in file and displays it String line3 = scan.nextLine(); System.out.println(line3); //Ask user if they want to change information System.out.println("Is this grade A-D or F? 1-yes,any other number-no: "); //Give the user a choice int choice = Integer.parseInt(in.nextLine()); if(choice == 1){ //asking the user to enter a new line System.out.println("Enter a replacement: "); String string = in.nextLine(); //adding to the list lines3.add(string); }//End of if statement else{ //adding the old line to the list lines3.add(line3); }//End of else statement ArrayList gradeWnated = lines3; CalculateStudyHours(lines3); }//End of while loop }//End of option B public static ArrayList CalculateStudyHours(ArrayList grade) { double studyHours; //Create Studyhours list double [] studyHoursList; while(grade.hasNextLine()){ if( grade == 'F' ) {//If test score Ave is under 60 studyHours = 0;//then letter grade is F studyHoursList.length(); }//End of if loop else if ( grade == 'D' ) { studyHours = 0;/ studyHoursList.length(); }//end of else if loop else if ( grade == 'C' ) { studyHours = 9; studyHoursList.length(); }//end of else if loop else if ( grade == 'B') {//If test score Ave is under 90 studyHours = 12; studyHoursList.length(); }//end of else if loop else if (grade == 'A') {//If test score Ave is under/equal to 100 studyHours = 15; studyHoursList.length(); }//end of else if loop return studyHoursList; } }

}// End of class

I did something similar in python last year:

GradeWanted = (StudentRecordsList[2::3])

HoursPerClassList = [] for Grade in GradeWanted: if Grade.upper() == 'F': HoursPreClass = 0 HoursPerClassList.append(HoursPreClass) elif Grade.upper() == 'D': HoursPreClass = 6 HoursPerClassList.append(HoursPreClass) elif Grade.upper() == 'C': HoursPreClass = 9 HoursPerClassList.append(HoursPreClass) elif Grade.upper() == 'B': HoursPreClass = 12 HoursPerClassList.append(HoursPreClass) elif Grade.upper() == 'A': HoursPreClass = 15 HoursPerClassList.append(HoursPreClass)