Methods

Question

I am trying to create two methods to work inside one class and it keeps giving me the illegal start of expression at compile time.
Any idea what I am doing wrong
/tag
mport javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class GradesClass {
ImageIcon schoolIcon = new ImageIcon ("c:\\users\\content\\pictures\\schoolbell.gif");
public void runProgram() {  //Running program
     double grades[];
     grades= new double[100];
     boolean correct = false;//this keep track of whether the user entered a number or not
String input = "";//used to store the user's input. Must be initialized here so it is in scope for second for loop
while(!correct)
String a = JOptionPane.showInputDialog (null, "How many grades do you need to enter?");
int numberGrades=Integer.parseInt(a);
          if (numberGrades < 0)
JOptionPane.showMessageDialog(null,"Please try again. There are one or more incorrect values.");
correct = false;//this will trigger the loop to go again
else
correct = true;
int k=1;
int l=1;
while (k<=numberGrades){
boolean correct1 = false;//this keep track of whether the user entered a number or not
//used to store the user's input. Must be initialized here so it is in scope for second for loop
while(!correct1)
String n= JOptionPane.showInputDialog(null, "Enter grade:");
final double gradesl=Double.parseDouble(n);
          if (gradesl < 0 || gradesl > 105){
JOptionPane.showMessageDialog(null,"Please try again. There is an incorrect value.");
correct1 = false;//this will trigger the loop to go again
else
correct1 = true;
grades[l]=gradesl;
l++;
k++;
} //end while statement
StringBuffer numbers = new StringBuffer();
for(int x=1; x<l; x++) {
numbers.append(grades[x] + " " ); }
int b= JOptionPane.showConfirmDialog(null, "Are these grades correct? \n" + numbers.toString(),
                                                            "GradeKeeper v1.0", JOptionPane.YES_NO_OPTION);
if (b == JOptionPane.YES_OPTION) {
int c= JOptionPane.showConfirmDialog(null, "Are you finished with this session?",
                                                  JOptionPane.YES_NO_OPTION);
                                                  if (c==JOptionPane.YES_OPTION) {
          JOptionPane.showMessageDialog(null, "Thank you for using Gradekeeper v1.0 \n" +
               " Have a great day!",
               "Goodbye", JOptionPane.INFORMATION_MESSAGE, schoolIcon);
else if (c==JOptionPane.NO_OPTION){
public static void enterProgram ( ) {
          int a = JOptionPane.showConfirmDialog (null, "Do you have any grades to enter?",
                    "Welcome to Gradekeeper v1.0", JOptionPane.YES_NO_OPTION,
                    JOptionPane.INFORMATION_MESSAGE,schoolIcon);
          if (a == JOptionPane.YES_OPTION) {
          JOptionPane.showMessageDialog(null, "Directions for Use: \n" +
                                                       "Do not leave any blank entries \n" +
                                                       "Use only numbers with no letters.\n"+
                                                       "Enter how many grades you are going to input on the following screen. \n");
          else if (a == JOptionPane.NO_OPTION) {
          JOptionPane.showMessageDialog(null, "Thank you for using Gradekeeper v1.0 \n" +
               " Have a great day!",
               "Goodbye", JOptionPane.INFORMATION_MESSAGE, schoolIcon);
//End of enterProgram
char[] gradeLetters = { 'A', 'B', 'C', 'D', 'E' };
//public static char getGradeFromPercent( double percent) {
//char grade;
//if ( percent >= 0.8 ) grade = 'A';
//if ( percent >= 0.7 && percent < 0.8 ) grade = 'B';
//if (percent < 0.7) grade = ?C?;
//return grade;
} //End enterProgram
public static void main (String [ ] args) {
enterProgram();
} //End of main
} //End of GradesClass
/tag

Answer 1

Thank you so much for all your help. This is my finished product. If anyone would take the time I would love to get some critiques on how to improve this and also on my style. Does everything look okay and line up the way it should. Thanks again.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class GradeClass2
    //Method created to enter the program and select if you want to use the program or leave.
      public static void enterProgram ()
      //Defaul icon of program
      ImageIcon schoolIcon = new ImageIcon ("c:\\users\\Brandon\\Pictures\\schoolbell.gif");
            //Requires user input to determine if they want to use program
            int userInput = JOptionPane.showConfirmDialog (null, "Do you have any grades to enter?",
                "Welcome to GradeKeeper v1.0", JOptionPane.YES_NO_OPTION,
                JOptionPane.INFORMATION_MESSAGE,schoolIcon);
        if (userInput == JOptionPane.YES_OPTION)
            //Directions wrote to use program
            JOptionPane.showMessageDialog (null, "Directions for Use: \n" +
                    "Do not leave any blank entries. \n" +
                    "Use only positive numbers without any letters.\n"+
                    "Enter how many grades you are going to input on the following screen. \n",
                                "GradeKeeper v1.0", JOptionPane.INFORMATION_MESSAGE, schoolIcon);
        else if (userInput == JOptionPane.NO_OPTION)
            //Goodbye message
                    JOptionPane.showMessageDialog (null, "Thank you for using GradeKeeper v1.0. \n" +
                    "                     Have a great day!",
                    "Goodbye", JOptionPane.INFORMATION_MESSAGE, schoolIcon);
                                System.exit(0);
      }//End of runProgram method 
      //Method created for the calculations of grades and inputs of grades from users
      public static void runProgram ()
        ImageIcon schoolIcon = new ImageIcon ("c:\\users\\Brandon\\Pictures\\schoolbell.gif");  //The icon of the program.
            //Declared and intialize values for error checking
            int errorCheck=1;
            //Declared and intialized to keep track of Array Elements used.
            int arrayElement=1;
            //Declared and initialized value to be used for fullReport
            int numberGrades=0;
            //Array created for the input of user grades
            double grades[];
        grades= new double[100];
            //While statement created for error checking the input of the user
            boolean correct = false;
        while(!correct)
            //String used for capturing the input of the user
                    String userInput = JOptionPane.showInputDialog (null, "How many grades do you need to enter?");
            numberGrades=Integer.parseInt(userInput);
            if (numberGrades < 0)
                JOptionPane.showMessageDialog (null,"Please try again. There are one or more incorrect values.");
                correct = false;//this will trigger the loop to go again
            else
                correct = true;
            //Error checking on the grades entered into the program.
                    while (errorCheck<=numberGrades)
                boolean correct1 = false;//This keeps track of whether the user entered a number or not
                while(!correct1)
                    //String created to gather user's inputs regarding grades
                                String userInput1= JOptionPane.showInputDialog (null, "Enter grade:");
                    final double gradesDouble=Double.parseDouble (userInput1);
                                //If statement to determine if grades are valid
                                if (gradesDouble < 0 || gradesDouble > 105)
                        JOptionPane.showMessageDialog (null,"Please try again. There is an incorrect value.");
                        correct1 = false;//this will trigger the loop to go again
                    else
                        correct1 = true;
                                //Used to store the grade in a different element of the array for each time the loop goes around.
                                grades[arrayElement]=gradesDouble;
                    errorCheck++;
                    arrayElement++;
                }//End of last while statement
            }//End of second while statment
        }//End of first while statement
        //For loop used to create a String to check the validity of the user's input and to sum the grades already entered
            double sum=0;
            StringBuffer checkGrades = new StringBuffer ();
        for(int i=1; i<arrayElement; i++)
            checkGrades.append (grades[i] + "      " );
                    sum=sum + grades;
//Question asked to user to check validity of grades. Report created through previous for loop
          int userInput= JOptionPane.showConfirmDialog (null, "Are these grades correct? \n" + checkGrades.toString (),
"GradeKeeper v1.0", JOptionPane.YES_NO_OPTION);
if (userInput == JOptionPane.YES_OPTION)
          //Computers average from sum and the number of grades entered
          double average = sum/numberGrades;
          //String that had to be created for compiler to compile...used for letterGrade
          String letterGrade="";
                    //If-else statements created to compute letter grade from average
                    if (average>=0 && average<=59){
                    letterGrade="E";
                         else if(average>=60 && average<=69){
                         letterGrade="D";
                         else if (average>=70 && average<=79){
                    letterGrade="C";
                         else if (average>=80 && average<=89){
                         letterGrade="B";
                         else if (average>=90 && average<=105){
                         letterGrade="A";
          //String created to print out a full report in JOptionPane
          String fullReport= ("FULL REPORT \n \n" + "TOTAL GRADES ENTERED: " + numberGrades + "\n \n"
          + "SUM OF GRADES: " + sum + "\n \n" + "AVERAGE: " + average + "\n \n"
                                             + "OVERALL LETTER GRADE: " + letterGrade);
          JOptionPane.showMessageDialog(null, fullReport);
          }//End of If statement for Yes Option
                    //Checks if user is finished with GradeKeeper
                    int userInput1= JOptionPane.showConfirmDialog (null, "Are you finished with this session?", "Finished?",
JOptionPane.YES_NO_OPTION);
if (userInput==JOptionPane.YES_OPTION)
JOptionPane.showMessageDialog (null, "Thank you for using Gradekeeper v1.0 \n" +
" Have a great day!",
"Goodbye", JOptionPane.INFORMATION_MESSAGE, schoolIcon);
                                        System.exit(0);
                    //Runs program again if user decides to stay in program
                    else if (userInput1==JOptionPane.NO_OPTION)
                         enterProgram();
                         runProgram();
//Runs program again if user decides to stay in program
          else if (userInput==JOptionPane.NO_OPTION)
enterProgram ();
runProgram ();
}//End of runProgram method
//Main method to run program
public static void main (String [ ] args)
enterProgram ();
          runProgram ();
}//End of GradeClass2