Thread: Syntax error!!!

I'm finishing this demo using get(whatever) in order to test a class

 
/**
 * The  ReportGenerator class uses the StudentReport1 class to simulate the report 
 * of a student. Holds fields for number of classes,grades received, average, and gpa.
 * 
 * @author Luis Fierro
 * @version 4/16/2014
 */
public class ReportGenerator
{
    public static void main(String [] args)
  {
    // declare variables
    private int numOfClasses;       //number of classes of the student
    private double grades;          //grades received in each class
    private average;                //average= sum of all grades / number of classes
    private gpa;                    //average converted to scale 1-4
    double total=0;			        //total of the grades 
	String trash;			        //to convert string to double
 
 
      // Get the number of classes of the student
      numOfClasses = getNumOfClasses();
 
      // Get the grades of the student
      grades = getGrades();
 
      //Get total
      tota= getTotal(grades);
 
      // Get the average
      average = getAverage(numOfGrades, total);
 
      // Get the gpa
      gpa = getGpa(average);
 
      // Display the Data
      displayData(average, gpa);
 
      System.exit(0);
 
  }
 
 
   public static double getNumOfClasses()
   {
      String input;        // To hold keyboard input
 
      input = JOptionPane.showInputDialog(
                 "Number of classes: ");
      return Double.parseDouble(input);
 
      for (int i = 1; i <=numOfGrades; i++) 
				{
 
			trash=JOptionPane.showInputDialog("Test " + i + " : " );
			grades=Integer.parseInt(trash);
 
 
				total+=grades;	
 
 
 
 
   public static double getGrades()
   {
      String input;        // To hold keyboard input
 
      input = JOptionPane.showInputDialog(
                     "Grades received: ");
      return Double.parseDouble(input);
   }
 
    public static double getTotal(double grades)
   {
 
      return =+grades;
   }
 
 
 
   public static double getAverage(double total, double numOfClasses)
   {
      return total / numOfClasses;
 
   }
 
   public static double getGpa(double average)
   {
      return (average*4)/100;
 
   }
 
 
 
   public static void displayData(double average, double gpa,
                                  double area)
   {
      JOptionPane.showMessageDialog(null, "Name :" + getName() + "\nGrade" + getSGrade() +
                                    "\nSchool: " + getSName + "\nAverage: " + average + 
                                    "n\GPA: " + gpa + ".");
   }
  }
}

This is my class to test:

 
/**
 * The StudentReport1 class has fields for name, grade, school, of a student
 * 
 * @author Luis Fierro
 * @version 4/05/2014
 */
public class StudentReport1
{
    // instance variables - replace the example below with your own
    private String name;
    private String sGrade;
    private String sName;
 
    /**
     * Constructor for objects of class StudentReport1
     * @param n The student's name
     * @param sg The student's grade in school
     * @param sn The student's school name
     * 
     */
    public StudentReport1(String n, String sg, String sn)
    {
        // initialise instance variables
        name = n;
        sGrade = sg;
        sName = sn;
    }
 
    /**
     * setName method 
     * 
     * @param  n The student's name
     */
    public void setName(String n)
    {
        name = n;
    }
 
    /**
     * setSGrade method 
     * 
     * @param  sg The student's grade in school
     */
    public void setSGrade(String sg)
    {
        sGrade = sg;
    }
 
    /**
     * setSName method 
     * 
     * @param  sn The student's school name
     */
    public void setSName(String sn)
    {
        sName = sn;
    }
 
    /**
     * getName method 
     * @return n Return the name of the student 
     */
    public String getName()
    {
        return name;
    }
 
    /**
     * getSGrade method
     * @return sg Return the student's grade in school
     * 
     */
    public String getSGrade()
    {
        return sGrade;
    }
 
    /**
     * getSName method
     * @return sn Return the student's school name
     */
    public String getSName()
    {
        return sName;
    }
 
    public String toString()
    {
        return "Name: " + name + "\nGrade: " + sGrade + "\nSchool"
                + sName;
    }
}

I haven't change the double numOfClasses sorry, but the main problem is that it says error and I don't know what is wrong in my code
I Think there must be something wrong with the getNumOfClasses part and getTotal
but I don't knwo what is wron

I change the variable to :
private int numOfClasses;
but it says illegal start of expression

--- Update ---

haha sorry thats was a dumb question it was because I declared the variables inside the main method instead of outside
I also missed the double part of average and gpa
But now I'm getting:
Non-static variable numOfGrades cannot be referenced from a static context

--- Update ---

The code should dispaly The information of the user and the average, and gpa but it is not working in that way. When I fix something there are more errors and Idk what to do

It doesn't really say error it just crash when running and Idk what I suppose to fix, idk if you could look the code of the demo. Thats where the error should be

--- Update ---

 
/**
 * The  ReportGenerator class uses the StudentReport1 class to simulate the report 
 * of a student. Holds fields for number of classes,grades received, average, and gpa.
 * 
 * @author Luis Fierro
 * @version 4/16/2014
 */
public class ReportGenerator
{
 
    public static void main(String [] args)
  {
           // declare variables
    int numOfGrades;       //number of classes of the student
    int grades;          //grades received in each class
    double average;                //average= sum of all grades / number of classes
    double gpa;                    //average converted to scale 1-4
    int total=0;			        //total of the grades 
	String trash;			        //to convert string to double
 
 
 
 
      // Get the number of classes of the student
      numOfGrades =  getNumOfGrades();
 
 
 
      //Get total
      total= getTotal(grades);
 
      // Get the average
      average = getAverage(numOfGrades, total);
 
      // Get the gpa
      gpa = getGpa(average);
 
      // Display the Data
      displayData(average, gpa);
 
      System.exit(0);
 
  }
 
 
   public static int getNumOfGrades()
   {
      String input;        // To hold keyboard input
 
      input = JOptionPane.showInputDialog(
                 "Number of classes: ");
      return Double.parseDouble(input);
 
  }
 
 
   public static double getGrades(int numOfGrades)
   {
      String input;        // To hold keyboard input
 
       //to get total  
      for (int i = 1; i <=numOfGrades; i++) 
				{
 
			trash=JOptionPane.showInputDialog("Test " + i + " : " );
			grades=Integer.parseInt(trash);
 
 
 
				total+=grades;	
                }
 
   }
 
    public static double getTotal(double grades)
   {
 
      return total=+grades;
   }
 
 
 
   public static double getAverage(double total, int numOfClasses)
   {
      return total / numOfClasses;
 
   }
 
   public static double getGpa(double average)
   {
      return (average*4)/100;
 
   }
 
 
 
   public static void displayData(double average, double gpa,
                                  double area)
   {
      JOptionPane.showMessageDialog(null, "Name :" + StudentReport.getName() + "\nGrade" 
                                    + StudentReport.getSGrade() + "\nSchool: "
                                    + Student.getSName
                                    + "\nAverage: " + average + 
                                    "\nGPA: " + gpa + ".");
   }
  }

I made some changes but still doesn't run

there's something
possible loss of precision
required: int; founr: double

total=getTotal(grades);

I changed my code and declared
StudentReport1 method = new StudentReport1();

but is says "constructor StudentReport1 in class StudentReport1 cannot be applied
to given types; required: java.lang.String,java.lang.String,java.lang.String
found:no arguments
reason: actual and formal argument lists differ in length

I have this until now but how can I do in order to name a method inside the main method like
I have public static void main(String[]args)
{
public main StudentReport1 getData()
{
I know that is wrong but how do I write it without affecting the rest or isolating the rest

import javax.swing.*;
/**
 * The  ReportGenerator class uses the StudentReport1 class to simulate the report 
 * of a student. Holds fields for number of classes,grades received, average, and gpa.
 * 
 * @author Luis Fierro
 * @version 4/16/2014
 */
public class ReportGenerator
{
 
    public static void main(String [] args)
  {
 
      // declare variables
    int numOfGrades;       //number of classes of the student
    int grades;          //grades received in each class
    double average;                //average= sum of all grades / number of classes
    double gpa;                    //average converted to scale 1-4
    int total=0;			        //total of the grades 
	String trash;			        //to convert string to double
 
 
        /**
     * getData method creates a StudentReport1 object
     * pobulated with data from the user
     * 
     * @return A reference to StudentReport1
     */
     public main StudentReport1 getData()
    {
        //variables to hold  the information
         String Name;
         String schoolGrade;
         String schoolName;
 
        //read the information
        name=JOptionPane.showInputDialog("Enter your name: ");
        schoolGrade=JOptionPane.showInputDialog("Enter your grade in school: ");
        schoolName=JOptionPane.showInputDialog("Enter the name of your school: ");
 
        //create a phoneBook entry object
        StudentReport1 data = new StudentReport1(name, schoolGrade, schoolName);
 
        //return a reference to the object
        return data;
 
    }
 
      // Get the average
      average = getAverage(numOfGrades, total);
 
      // Get the gpa
      gpa = getGpa(average);
 
 
      //ask number of grades
      trash=JOptionPane.showInputDialog("Number of grades:");             
		numOfGrades=Integer.parseInt(trash);				              		                                                                  // All in one
 
	  //get the grades added together in order to calculate the average
		for (int i = 1; i <=numOfGrades; i++) 
				{
 
			trash=JOptionPane.showInputDialog("Test " + i + " : " );
			grades=Integer.parseInt(trash);
 
 
				total+=grades;	
 
				}
  }
 
   public static double getAverage(double total, int numOfClasses)
   {
      return total / numOfClasses;
 
   }
 
   public static double getGpa(double average)
   {
      return (average*4)/100;
 
   }
 
 
   /**
     * showData method shows the data stored in  
     * the  StudentReport1 object
     * 
     * @param data The data to show 
     */
 
   public static void showData(StudentReport1 data, double average, double gpa,
                                  double area)
   {
      JOptionPane.showMessageDialog(null, "Name :" + data.getName() + "\nGrade" 
                                    + data.getSGrade() + "\nSchool: "
                                    + data.getSName
                                    + "\nAverage: " + average + 
                                    "\nGPA: " + gpa + ".");
   }
  }

I fixed it and now I'm not getting any error but it is not working as it should be.
I'm usign BJ and when starting the demo it jumps to the part "Enter the number of grades:"
Then after choosing a number it prompts the respective windows but after entering the last grade it doesn't happend anything it
looks like if the program is over idk what is wrong this is my code:

import javax.swing.*;
/**
 * The  ReportGenerator class uses the StudentReport1 class to simulate the report 
 * of a student. Holds fields for number of classes,grades received, average, and gpa.
 * 
 * @author Luis Fierro
 * @version 4/16/2014
 */
public class ReportGenerator
{
 
    /**
     * getData method creates a StudentReport1 object
     * pobulated with data from the user
     * 
     * @return A reference to StudentReport1
     */
     public static StudentReport1 getData()
    {
        //variables to hold  the information
         String name;
         String schoolGrade;
         String schoolName;
 
        //read the information
        name=JOptionPane.showInputDialog("Enter your name: ");
        schoolGrade=JOptionPane.showInputDialog("Enter your grade in school: ");
        schoolName=JOptionPane.showInputDialog("Enter the name of your school: ");
 
        //create a phoneBook entry object
        StudentReport1 data = new StudentReport1(name, schoolGrade, schoolName);
 
        //return a reference to the object
        return data;
 
    }
 
    public static void main(String [] args)
  {
 
      // declare variables
    int numOfGrades=0;       //number of classes of the student
    int grades;          //grades received in each class
    double average;                //average= sum of all grades / number of classes
    double gpa;                    //average converted to scale 1-4
    int total=0;			        //total of the grades 
	String trash;			        //to convert string to double
 
 
 
 
 
      // Get the average
      average = getAverage(numOfGrades, total);
 
      // Get the gpa
      gpa = getGpa(average);
 
 
      //ask number of grades
      trash=JOptionPane.showInputDialog("Number of grades:");             
		numOfGrades=Integer.parseInt(trash);				              		                                                                 
 
	  //get the grades added together in order to calculate the average
		for (int i = 1; i <=numOfGrades; i++) 
				{
 
			trash=JOptionPane.showInputDialog("Test " + i + " : " );
			grades=Integer.parseInt(trash);
 
 
				total+=grades;	
 
				}
    }
 
 
   public static double getAverage(double total, int numOfClasses)
   {
      return total / numOfClasses;
 
   }
 
   public static double getGpa(double average)
   {
      return (average*4)/100;
 
   }
 
 
   /**
     * showData method shows the data stored in  
     * the  StudentReport1 object
     * 
     * @param data The data to show 
     */
 
   public static void showData(StudentReport1 data, double average, double gpa)
 
   {
      JOptionPane.showMessageDialog(null, "Name :" + data.getName() + "\nGrade" 
                                    + data.getSGrade() + "\nSchool: "
                                    + data.getSName()
                                    + "\nAverage: " + average + 
                                    "\nGPA: " + gpa + ".");
   }
}

Could I see an example because I don't get it, like, what should I change or where should I add something

calculate and print average, and gpa

--- Update ---

Is there anyway that you can put me a example step by step because I have 1hr to turn in the code and I don't know how to fix that

number of classes
So it should look like
System.out.println(total=+grades);
Then
System.out.println("Enter number of grades: ")

Sorry is just that I wanna finish this fast to start with more homework and I don't even get focused on what I'm doing.
Ok... at the end of the code I was thinking on writing something like
JOptionPane.showMessageDialog(null, "Name: " (This would display the information, but idk how to call it from the methods) + method + );