java ClassAverageExam do,while condition

[xduh9]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.DateFormat;
import java.util.Date;

public class ClassAverageExam extends JFrame
{

private JLabel gradeListJLabel;
private JTextArea gradeListJTextArea;
private JLabel securityCodeJLabel;
private JPasswordField securityCodeJPasswordField;



private JButton getGradesJButton;


private JButton yesJButton;


private JButton averageJButton;


private JLabel ClassAverageExamJLabel;
private JTextField classAverageJTextField;

private int total = 0;


public ClassAverageExam()
{
createUserInterface();
}


private void createUserInterface()
{

Container contentPane = getContentPane();


contentPane.setLayout( null );


gradeListJLabel = new JLabel();
gradeListJLabel.setBounds( 16, 8, 70, 23 );
gradeListJLabel.setText( "Grade list:" );
contentPane.add( gradeListJLabel );


gradeListJTextArea = new JTextArea();
gradeListJTextArea.setBounds( 16, 32, 88, 180 );
contentPane.add( gradeListJTextArea );


getGradesJButton = new JButton();
getGradesJButton.setBounds( 128, 50, 100, 26 );
getGradesJButton.setText( "Get Grades" );
contentPane.add( getGradesJButton );
getGradesJButton.addActionListener(

yesJButton = new JButton();
yesJButton.setBounds( 80, 64, 50, 50 );
yesJButton.setText( "yes" );
contentPane.add( yesButton );
yesButton.addActionListener(

new ActionListener()
{

public void actionPerformed( ActionEvent event )
{
getGradesJButtonActionPerformed( event );
}

}

);


averageJButton = new JButton();
averageJButton.setBounds( 128, 90, 100, 26 );
averageJButton.setText( "Average" );
averageJButton.setEnabled( false );
contentPane.add( averageJButton );
averageJButton.addActionListener(

new ActionListener()
{

public void actionPerformed( ActionEvent event )
{
averageJButtonActionPerformed( event );
}

}

);


ClassAverageExamJLabel = new JLabel();
ClassAverageExamJLabel.setBounds( 128, 132, 90, 23 );
ClassAverageExamJLabel.setText( "Class average:" );
contentPane.add( ClassAverageExamJLabel );


classAverageJTextField = new JTextField();
classAverageJTextField.setBounds( 128, 156, 100, 21 );
classAverageJTextField.setEditable( false );
classAverageJTextField.setHorizontalAlignment(
JTextField.CENTER );
contentPane.add( classAverageJTextField );


setTitle( "Class Average" );
setSize( 250, 250 );
setVisible( true );

}private void yesJButtonActionPerformed( ActionEvent event)
{
securityCodeJPasswordField.setText(String.valueOf(
securityCodeJPasswordField.getPassword() ) + "yes" );
}
{
securityCodeJPasswordField.setText( "" );
private void enterJButtonActionPerformed( ActionEvent event )
{
String message;

int accessCode = Integer.parseInt( String.valueOf(
securityCodeJPasswordField.getPassword() ) );

securityCodeJPasswordField.setText( "" );

switch ( accessCode )
{

}


private void getGradesJButtonActionPerformed( ActionEvent event )
{
total = 0;
int counter = 1;
String input;
int grade;


gradeListJTextArea.setText( "" );
classAverageJTextField.setText( "" );

do
{

input = JOptionPane.showInputDialog( null, "Enter Grade" );
grade = Integer.parseInt( input );


gradeListJTextArea.append( grade + "\n" );
total += grade;
counter++;
}
while ( counter <= 10 );

averageJButton.setEnabled( true );
averageJButton.requestFocusInWindow();

}


private void averageJButtonActionPerformed( ActionEvent event )
{
double average = ( double ) total / 10;
classAverageJTextField.setText( String.valueOf( average ) );

}


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

}

}


help me master!
how to loop to display msgbox in condition if i continue to enter another grades.
thank you master..
need help!

[xduh9]

sir help me on this situation..