New to Netbeans - Project Question

[Nc Marie]

Hi - I'm working on a project to allow a user to enter test scores one at a time then click the Enter Score button. After each entered score, the application returns the number of scores (count), Average Score and Best score. The program accumulates each entry and calculates values on all entries until the clear button is clicked. The code I have so far is pasted below - it's rough - I apologize - I'm brand new at this! Thanks for your help.

import java.text.NumberFormat;  
import javax.swing.*;
import javax.swing.text.JTextComponent;

public class StudentScoresFrame extends javax.swing.JFrame {
    private double[] scores;

    /** Creates new form StudentScoresFrame */
    public StudentScoresFrame() {
        initComponents();
    }
    

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        testScoreTextField = new javax.swing.JTextField();
        numberOfScoresTextField = new javax.swing.JTextField();
        averageScoreTextField = new javax.swing.JTextField();
        bestScoreTextField = new javax.swing.JTextField();
        enterButton = new javax.swing.JButton();
        exitButton = new javax.swing.JButton();
        clearButton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("Test Score:");

        jLabel2.setText("Number of Scores:");

        jLabel3.setText("Average Score:");

        jLabel4.setText("Best Score:");

        numberOfScoresTextField.setEditable(false);
        numberOfScoresTextField.setEnabled(false);
        numberOfScoresTextField.setFocusable(false);

        averageScoreTextField.setEditable(false);
        averageScoreTextField.setEnabled(false);

        bestScoreTextField.setEditable(false);
        bestScoreTextField.setEnabled(false);

        enterButton.setText("Enter Score");
        enterButton.setActionCommand("Enter Score");
        enterButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                enterButtonActionPerformed(evt);
            }
        });

        exitButton.setText("Exit");
        exitButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                exitButtonActionPerformed(evt);
            }
        });

        clearButton.setText("Clear");
        clearButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clearButtonActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(20, 20, 20)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel4)
                            .addComponent(jLabel3))
                        .addGap(30, 30, 30)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(numberOfScoresTextField)
                            .addComponent(bestScoreTextField)
                            .addComponent(testScoreTextField)
                            .addComponent(averageScoreTextField)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(0, 11, Short.MAX_VALUE)
                        .addComponent(enterButton)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(clearButton, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(exitButton)))
                .addContainerGap(28, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(testScoreTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(numberOfScoresTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(averageScoreTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(bestScoreTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(exitButton)
                            .addComponent(enterButton)
                            .addComponent(clearButton)))
                    .addComponent(jLabel4))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        jLabel1.getAccessibleContext().setAccessibleName("Test Score:");

        pack();
    }// </editor-fold>                        

private void exitButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
 System.exit(0);
}                                          

private void enterButtonActionPerformed(java.awt.event.ActionEvent evt) {                                            
 {
 double testScore = Double.parseDouble(testScoreTextField.getText());
 double number = calculateScores(testScore);
 double average = calculateScores(testScore);
 double best = calculateScores(testScore);

 numberOfScoresTextField.setText(Double.toString(number));
 averageScoreTextField.setText(Double.toString(average));
 bestScoreTextField.setText(Double.toString(best));
 }
}
private double calculateScores(double testScore)
{
			double sum = 0.0;
			double max = scores[0];
			double min = scores[0];
			double best = 0;
			
			for (int i = 1; i < scores.length; i++)
			{
				if( scores[i] > max)
				{
					max = scores[i];
					best = i;
				}
			
return scores[i];
                        }

    if (testScoreTextField.getText().length() == 0)
{
    String message =
        "Test Score is a required field.";
    String title = "Invalid Entry";
    JOptionPane.showMessageDialog(this, message, 
        title, JOptionPane.ERROR_MESSAGE);
    testScoreTextField.requestFocusInWindow();
 
}
try
{
    double d = Double.parseDouble(
               testScoreTextField.getText());
}
catch (NumberFormatException e)
{
    String message =
        "Test Score must be a valid number.";
    String title = "Invalid Entry";
    JOptionPane.showMessageDialog(this, message,
        title, JOptionPane.ERROR_MESSAGE);
    testScoreTextField.requestFocusInWindow();
}
        return 0;
}                                           


    private void clearButtonActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
                
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentScoresFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentScoresFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentScoresFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentScoresFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                StudentScoresFrame frame =
                new StudentScoresFrame();
            frame.setVisible(true);
            frame.setLocationRelativeTo(null);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JTextField averageScoreTextField;
    private javax.swing.JTextField bestScoreTextField;
    private javax.swing.JButton clearButton;
    private javax.swing.JButton enterButton;
    private javax.swing.JButton exitButton;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JTextField numberOfScoresTextField;
    private javax.swing.JTextField testScoreTextField;
    // End of variables declaration                   
}

[Jeanne Boyarsky]

Welcome to CodeRanch! I've edited your post to add [ code ] tags which makes the code easier to read.

I don't see what the question is though. Can you restate it?

[Nc Marie]

Thank you for your response! My question is I am looking for the code to actually calculate and return the values of best score, average score and number of scores entered each time the user clicks the "Enter Score" button. The code below is referencing an array but my type is double. I think I need to use an array list but not sure how to code that. Hope that makes sense! Thanks!

[Ranganathan Kaliyur Mannar]

Forget about the GUI for a moment and work only on the calculateScores method. You can test this in a separate class.

Whenever the calculateScore is called with a testScore, you first need to add this testScore to your existing score(s) (which might have been added earlier). You have declared an double array, but, I don't see anywhere the testScore being set in the array. As you can see, you will have to dynamically allocate the size of array every time a score is added and also copy over the earlier values. Like you have said, this is what ArrayList does.
For all primitive types, Java has a corresponding class which are called wrapper classes. So, in this case, you should use an array list which can take instances of Double.

I think I have given you an outline and enough info to start with.