Having "Cannot find symbol" and "Class, Interface, Enum Expected" Errors still

[Lucas Stelljes]

Greetings,

I am new to Java SE. In my previous CompSci experience I used Python. I have writing a program currently that requires my to calculate a GPA given the user's input for Grades in 5 classes. On top of this, I must calculate and print if their GPA is sufficient enough to award them making the President's List, Dean's List, or Academic Probation.

I am not allowed to use a loop to ask the User to input their class/grade 5 times, so I am unsure how to ask the user for their inputs without a loop. Also, I must include the line of code: "private static double gpaPts(String grade) {" and am unsure where to include this, much-less what its function is.

I am having issues in lines 34-59 with "Cannot find symbol, identifier expected, and Illegal start of type." I know this is alot wrong, but any help at all would help me on my way to writing this program fully. If any more details are required, please do ask. I am new to programming and don't always know how much is needed to fix something.

Thanks!

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package GPA_HW1;

/**
 *
 * @author Owner
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main (String args[]){
        java.util.Scanner input = new java.util.Scanner (System.in);
            for (int counter = 1; counter = 5; counter ++)
                System.out.printf("%d", counter);
            System.out.print("How many credits was your class");
            int credits = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            int grade = input.nextInt(); input.nextLine();
    }    // TODO code application logic here// TODO code application logic here
    int totalgrades = average / gradecounter;{
    int gpaPts = totalgrades;{
    if (gpaPts == 4.0){
        System.out.print("You made the President's List!");}
    if (gpaPts >= 3.5){
        System.out.print("You made the Dean's List!");}
    if (gpaPts < 2.0){
        System.out.print("You will be place on Academic Probation :'(");}
    }
}
private static double gpaPts(String grade) {
    if (grade == A)
        System.out.print("4.0");
    else if(grade == A-)
        System.out.print("3.7");
    else if(grade == B+)
        System.out.print("3.3");
    else if (grade == B)
        System.out.print("3.0");
    else if(grade == B-)
        System.out.print("2.7");
    else if (grade == C+)
        System.out.print("2.4");
    else if (grade == C)
        System.out.print("2.0");
    else if (grade == C-)
        System.out.print("1.7");
    else if (grade == D+)
        System.out.print("1.3");
    else if (grade == D-)
        System.out.print("1.0");
    else if (grade == F)
        System.out.print("0.0");
    else if()
        System.out.print("-1.0");
        System.out.print("Error!");}
}

[sri ramvaithiyanathan]

Lucas Stelljes wrote:

       for (int counter = 1; counter = 5; counter ++)
       int totalgrades = average / gradecounter;

   private static double gpaPts(String grade) {
    if (grade == A)
        System.out.print("4.0");
    else if(grade == A-)
        System.out.print("3.7");
    else if(grade == B+)
        System.out.print("3.3");
    else if (grade == B)
        System.out.print("3.0");
    else if(grade == B-)
        System.out.print("2.7");
    else if (grade == C+)
        System.out.print("2.4");
    else if (grade == C)
        System.out.print("2.0");
    else if (grade == C-)
        System.out.print("1.7");
    else if (grade == D+)
        System.out.print("1.3");
    else if (grade == D-)
        System.out.print("1.0");
    else if (grade == F)
        System.out.print("0.0");
    else if()
        System.out.print("-1.0");
        System.out.print("Error!");}
}

Hi Lucas,
Welcome to coderanch.
In quotes you can see the mistakes you did.

1) In for loop given condition,whether counter <=5 or <5.what is the condition for counter
If you use counter=5,Type mismatch error will occur.
2)what is the datatype of average and gradecounter in your program.
whether its string or int or boolean.Straight away you used in your program.you should not do like that
It will throw error.
3)Inside gpaPts method everything you did is wrong.what is tat A,B,C,A-
If you want to check the outcome of grade==A.
use this way grade.equals("A") or if you think the grade may be A or a.
Then use this way grade.equalsIgnoreCase("A");

P.S: Sorry to say this Read Java first.

Regards,
Sriram.V

[Campbell Ritchie]

Welcome to the Ranch

Don't write so much code. Write 5 lines, compile them and look for errors. It is much easier to find an error in 5 lines than in 62.

[Lucas Stelljes]

Okay, I made corrections that both of you recommended. Thank you.

I have resolved many of the issues but am still having a few errors.

In the lines where I try to calculate the "double totalGradeX" it tells me "Cannot find symbol (method gpaPts(java.lang.String)." I am confused because I thought my gpaPts method outside the "Main() {" function should be called to solve these "double totalGradeX" statements.

My "private static String finalGrades(double gpaPts){" is missing a return statement, but I am unsure of what to place afterwards as an appropriate return.

Lastly, my "private static double gpaPts(String grade){" claims there is a "Class, Interface, or Enum Expected" error. I have looked up how to solve this and reviewed notes I have on this topic, but I don't understand the solution. What am I supposed to type earlier in the program to make this method recognize the code?

Again, let me know if I can clarify anything.
Thanks.

public static void main (String args[]){
        java.util.Scanner input = new java.util.Scanner (System.in);
            System.out.print("How many credits was your first class");
            int credits1 = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            String grade1 = input.nextLine();
            double totalGrade1 = gpaPts(grade1);

            System.out.print("How many credits was your second class");
            int credits2 = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            String grade2 = input.nextLine();
            double totalGrade2 = gpaPts(grade2);

            System.out.print("How many credits was your third class");
            int credits3 = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            String grade3 = input.nextLine();
            double totalGrade3 = gpaPts(grade3);

            System.out.print("How many credits was your fourth class");
            int credits4 = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            String grade4 = input.nextLine();
            double totalGrade4 = gpaPts(grade4);

            System.out.print("How many credits was your fifth class");
            int credits5 = input.nextInt(); input.nextLine();
            System.out.print("What grade did you get?");
            String grade5 = input.nextLine();
            double totalGrade5 = gpaPts(grade5);

            double allPoints=(totalGrade1+credits1)+(totalGrade2+credits2)+(totalGrade3+credits3)+(totalGrade4+credits4)+(totalGrade5+credits5);
            double allCredits=credits1+credits2+credits3+credits4+credits5;
            double gpaPts=allPoints/allCredits;

            System.out.printf("You're GPA is %.2f \n", gpaPts);
            System.out.print(finalGrades(gpaPts));
    }    // TODO code application logic here// TODO code application logic here
    private static String finalGrades(double gpaPts){
        if (gpaPts == 4.0){
            System.out.println("You made the President's List!");}
        if (gpaPts >= 3.5){
            System.out.println("You made the Dean's List!");}
        if (gpaPts < 2.0){
            System.out.println("You will be place on Academic Probation :'(");}
        }
}
    private static double gpaPts(String grade) {
        if(grade.equals("A")){
            double gradePoint = 4.0
        }
        if(grade.equals("A-")){
            double gradePoint = 3.7
        }

[Wouter Oet]

Check your brackets. If you fix those some exceptions will make more sence. Some statements miss a semicolon. So they won't compile.
You have written the methods so you must have an reason why you declared it to return a String/double and what the meaning of that String/double is.
Also you have a lot of duplicate code. Try to create a method and call it with different parameters (and maybe use a loop).

[Campbell Ritchie]

A "class enum or interface expected error" usually means one of two things

If it appears to be at the beginning of the class, you have misspelt the keyword, eg Class for class or publicclass

If it appears at the end of the class, most likely you have too many } for the number of {

Missing a return means that the last line of the method (with a few exceptions) must start return, followed by something in the format specified by the method's return type. So your gpaPtas method must have return s; as its last line where "s" is a String.

You can usually find the cause of unmatched {} if you indent your code correctly; I would agree with the suggestions here. If your {} are correctly indented, they will be paired vertically like this

{
   {
   }
   {
      {
      }
   }
}

or this. . .

{
   {
      {
   }
   {
      {
      }
   }
}

and you can easily see which braces are incorrectly paired.

[sri ramvaithiyanathan]

private static double gpaPts(String grade) {   
        if(grade.equals("A")){   
            double gradePoint = 4.0  
        }   
        if(grade.equals("A-")){   
            double gradePoint = 3.7  
        }  

You have missed close brace in gpaPts method.

private static String finalGrades(double gpaPts)

private static double gpaPts(String grade)

And i will tell you one thing if you put close brace also its not going to work,because no return type found for above mentioned method.
Dont think i'm discouraging you,do simple program first then only you will get idea and you will become king in Java.
So try to do programming from small java programs.
All the best dude....

Regards,
Sriram.V

[Lucas Stelljes]

I appreciate all the help guys.

I would LOVE to start at a more simplistic approach to Java. However, being in a college course doesn't really allow that

I configured the program to work perfectly, alot of which came from the help provided here. I will definitely try to contribute things I learn and also seek advice when needed.

Thank you,
-Lucas

[sri ramvaithiyanathan]

Lucas you are always welcome.
we are happy to help.
If you have passion in java you will learn java in your college duration itself.
All the best...

Regards,
Sriram.V