Hey Guys,

I've never used JLabel and JText Area before and this specific project requires it. I'm trying to create something that allows entry of student name, id and 2 grades. Then get the average of the 2 tests and show the letter grade equivalent. I'm getting error messages that says "illegal start of expression" on the public static void towards the bottom of coding. do you have any suggestions on how to run this properly??? Thanks!

import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
import javax.swing.border.*;
public class StudentGrades extends JFrame
{
// JPanel for user inputs
private JPanel inputGradeJPanel;

// JLabel and JTextField for student name
private JLabel studentNameJLabel;
private JTextField studentNameJTextField;

// JLabel and JTextField for student ID
private JLabel studentIDJLabel;
private JTextField studentIDJTextField;

// JLabel and JTextField for midterm score
private JLabel midtermJLabel;
private JTextField finalsJTextField;
// JLabel and JTextField for finals score
private JLabel finalsJLabel;
private JTextField finalsJTextField;
// JButton to calculate student grade
private JButton submitGradesJButton;
// JLabel and JTextArea to display student grade
private JLabel displayJLabel;
private JTextArea displayJTextArea;
// JButton to show student letter grade
private JButton submitGradesJButton;
// JLabel and JTextArea to display student letter grade
private JLabel displayJLabel;
private JTextArea displayJTextArea;
// initialize number of students to zero
private int studentCount = 0;
// constants
private final int number_of_tests = 2;
private final int maximum_students = 10;
private final int midterm_test = 0;
private final int final_test = 1;

// one-dimensional array to store student names
private String studentNames[] = new String[ maximum_students ];
// two-dimensional array to store student grades
private int studentGrades[][] =
new int[ maximum_students ][ number_of_tests ];
// DecimalFormat for two digits of precision
private DecimalFormat twoDigits = new DecimalFormat( "0.00" );
// no-argument constructor
public StudentGrades()
{
createUserInterface();
}
// create and position GUI components; register event handlers
private void createUserInterface()
{
Container contentPane = getContentPane();
contentPane.setLayout( null );
// set up inputGradeJPanel
inputGradeJPanel = new JPanel();
inputGradeJPanel.setBounds( 16, 16, 208, 218 );
inputGradeJPanel.setBorder(
new TitledBorder( "Input Grade" ) );
inputGradeJPanel.setLayout( null );
contentPane.add( inputGradeJPanel );

// set up studentNameJLabel
studentNameJLabel = new JLabel();
studentNameJLabel.setBounds( 8, 32, 90, 23 );
studentNameJLabel.setText( "Student Name:" );
inputGradeJPanel.add( studentNameJLabel );
// set up studentNameJTextField
studentNameJTextField = new JTextField();
studentNameJTextField.setBounds( 104, 32, 88, 21 );
studentNameJTextField.setHorizontalAlignment(
JTextField.RIGHT );
inputGradeJPanel.add( studentNameJTextField );

// set up studentIDJLabel
studentNameJLabel = new JLabel();
studentNameJLabel.setBounds( 8, 32, 90, 23 );
studentNameJLabel.setText( "Student ID:" );
inputGradeJPanel.add( studentNameJLabel );
// set up studentIDJTextField
studentNameJTextField = new JTextField();
studentNameJTextField.setBounds( 104, 32, 88, 21 );
studentNameJTextField.setHorizontalAlignment(
JTextField.RIGHT );
inputGradeJPanel.add( studentIDJTextField );

// set up midtermJLabel
test1JLabel = new JLabel();
test1JLabel.setBounds( 8, 74, 60, 23 );
test1JLabel.setText( "Midterm:" );
inputGradeJPanel.add( test1JLabel );
// set up midtermJTextField
test1JTextField = new JTextField();
test1JTextField.setBounds( 136, 74, 56, 21 );
test1JTextField.setHorizontalAlignment( JTextField.RIGHT );
inputGradeJPanel.add( test1JTextField );
// set up finalJLabel
test2JLabel = new JLabel();
test2JLabel.setBounds( 8, 74, 60, 23 );
test2JLabel.setText( "Final:" );
inputGradeJPanel.add( test2JLabel );

// set up finalJTextField
test1JTextField = new JTextField();
test1JTextField.setBounds( 136, 74, 56, 21 );
test1JTextField.setHorizontalAlignment( JTextField.RIGHT );
inputGradeJPanel.add( test1JTextField );
// set up submitGradesJButton
submitGradesJButton = new JButton();
submitGradesJButton.setBounds( 72, 182, 120, 24 );
submitGradesJButton.setText( "Submit Grades" );
inputGradeJPanel.add( submitGradesJButton );
submitGradesJButton.addActionListener(

new ActionListener() // anonymous inner class
{
// event handler called when submitGradesJButton
// is clicked
public void actionPerformed( ActionEvent event )
{
submitGradesJButtonActionPerformed( event );
}
} // end anonymous inner class
); // end call to addActionListener
// set up displayJLabel
displayJLabel = new JLabel();
displayJLabel.setBounds( 240, 16, 150, 23 );
displayJLabel.setText( "Grade:" );
contentPane.add( displayJLabel );

// set up displayJTextArea
displayJTextArea = new JTextArea();
displayJTextArea.setBounds( 240, 48, 402, 184 );
displayJTextArea.setEditable( false );
contentPane.add( displayJTextArea );

// set properties of application's window
setTitle( "Student Grades for CIS190 Online Programming" ); // set title bar string
setSize( 670, 308 ); // set window size
setVisible( true ); // display window
} // end method createUserInterface
// convert a number to a letter grade
private String convertToLetterGrade( double grade )
{
if ( grade >= 90 )
{
return "A";
}
else if ( grade >= 80 )
{
return "B";
}
else if ( grade >= 70 )
{
return "C";
}
else if ( grade >= 60 )
{
return "D";
}
else
{
return "F";
}

} // end method convertToLetterGrade
// calculate and display the student and class average
private void submitGradesJButtonActionPerformed(
ActionEvent event )
{
// get user input
String nameOfStudent = studentNameJTextField.getText();
int test1 = Integer.parseInt( test1JTextField.getText() );
int test2 = Integer.parseInt( test2JTextField.getText() );

// add user input to arrays
studentNames[ studentCount ] = nameOfStudent;
studentID [studentID ] = studentID;
studentGrades[ studentCount ][ FIRST_TEST ] = test1;
studentGrades[ studentCount ][ SECOND_TEST ] = test2;

// clear other JTextFields for new data
studentNameJTextField.setText( "" );
studentIDJTextField.setText( "" );
test1JTextField.setText( "" );
test2JTextField.setText( "" );
} // end method submitGradesJButtonActionPerformed
// display student grades and averages as numbers
private void displayNumericGrades()
{
// add a header to displayJTextArea
displayJTextArea.setText(
"Name\tID\tMidterm 2\tAverage\t Grade\n" );
int studentTotal = 0; // store the student's total grades

for ( int student = 0; student < studentCount; student++ )
{
// display student names
displayJTextArea.append( studentNames[ student ] + "\t" );
studentTotal = 0; // initialize the student's total grades

for ( int test = 0; test < NUMBER_OF_TESTS; test++ )
{
{ // display student ID
displayJTextArea.append( studentID[ ID ] + "\t" );
studentTotal = 0; // store the student's ID

for ( int test = 0; test < NUMBER_OF_TESTS; test++ )
{
// append each test grade to displayJTextArea
displayJTextArea.append(
studentGrades[ student ][ test ] + "\t" );
// add the test grade to the student's total
studentTotal += studentGrades[ student ][ test ];
} // end inner for
// calculate the student average and display it
double studentAverage =
( double ) studentTotal / NUMBER_OF_TESTS;
displayJTextArea.append(
twoDigits.format( studentAverage ) + "\n" );

// add a header to displayJTextArea
displayJTextArea.setText(
"Name\tID\tMidterm 2\tAverage\t Grade\n" );
int studentTotal = 0; // store the student's total grades

for ( int student = 0; student < studentCount; student++ )
{
// display student names
displayJTextArea.append( studentNames[ student ] + "\t" );
studentTotal = 0; // initialize the student's total grades
for ( int test = 0; test < NUMBER_OF_TESTS; test++ )
{
// append each test grade to displayJTextArea
displayJTextArea.append( convertToLetterGrade(
studentGrades[ student ][ test ] ) + "\t" );
// add the test grade to the student's total
studentTotal += studentGrades[ student ][ test ];
} // end inner for
// calculate the student average and display it
double studentAverage =
( double ) studentTotal / NUMBER_OF_TESTS;
displayJTextArea.append(
convertToLetterGrade( studentAverage ) + "\n" );
} // end outer for

// main method
public static void main( String[] args )
{
StudentGrades application = new StudentGrades();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

} // end method main
} // end class StudentsGrade2