import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;

public class A5_JohnLooney extends JFrame
{
    private static A5_JohnLooney JohnLooney;
    private static final int WIDTH = 400;
    private static final int HEIGHT = 350;

    private JLabel TestLabel, NumberScoreLabel, AverageLabel, BestLabel;
    private JTextField TestTextField, NumberScoreTextField, AverageTextField, BestTextField;
    private JButton EnterScoreButton, ClearButton, ExitButton;
    private EnterScoreButtonHandler sbHandler;
    private ClearButtonHandler cbHandler;
    private ExitButtonHandler ebHandler;

    double TotalScore;
    int NumberScore;
    int BestScore;

    public void A5_JohnLooney()
    {

//Create the labels...

TestLabel = new JLabel("Test Score: ", SwingConstants.RIGHT);
NumberScoreLabel = new JLabel("Number of Scores: ", SwingConstants.RIGHT);
AverageLabel = new JLabel("Average Score: ", SwingConstants.RIGHT);

//Create Text Fields....

TestTextField = new JTextField(10);
NumberScoreTextField = new JTextField(10);
AverageTextField = new JTextField(10);
BestTextField = new JTextField(10);

//Create Enter Score Button....

EnterScoreButton = new JButton("Enter Score");
sbHandler = new EnterScoreButtonHandler();
EnterScoreButton.addActionListener(sbHandler);

//Create Clear Button....

ClearButton = new JButton("Clear");
cbHandler = new ClearButtonHandler();
ClearButton.addActionListener(cbHandler);

//Create Exit Button....

ExitButton = new JButton("Exit");
ebHandler = new ExitButtonHandler();
ExitButton.addActionListener(ebHandler);

//Set Title Window....

setTitle("Test Scores.");

//Get Container
Container pane = getContentPane();

//Set Layout

pane.setLayout(new GridLayout(6,3));

//Place the components in pane....

pane.add(TestLabel);
pane.add(TestTextField);
pane.add(NumberScoreLabel);
pane.add(NumberScoreTextField);
pane.add(AverageLabel);
pane.add(AverageTextField);
pane.add(BestLabel);
pane.add(BestTextField);
pane.add(EnterScoreButton);
pane.add(ClearButton);
pane.add(ExitButton);

//Set Size of Display....

pane.setSize(WIDTH, HEIGHT);
pane.setVisible(true);
//pane.setDefaultCloseOperation(EXIT_ON_CLOSE);

//Disable Text....

NumberScoreTextField.setEditable(false);
AverageTextField.setEditable(false);
BestTextField.setEditable(false);
}


private class ClearButtonHandler implements ActionListener
{

    public void actionPerformed(ActionEvent e)
    {
        NumberScore = 0;
        BestScore = 0;
        TestTextField.setText("");
        NumberScoreTextField.setText("");
        AverageTextField.setText("");
        BestTextField.setText("");
        TestTextField.requestFocusInWindow();
    }

        @Override
        public void actionPerformed(java.awt.event.ActionEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }

private class EnterScoreButtonHandler implements ActionListener
{
    public void actionPerformed(ActionEvent e)
    {
        double Test, Average;
        DecimalFormat oneDecimal = new DecimalFormat("0.0");

        Test = Double.parseDouble(TestTextField.getText());
        TotalScore += Test;
        NumberScore++;
            Average = (TotalScore / NumberScore);
            BestScore = (int) larger(BestScore,Test);

            NumberScoreTextField.setText("" + NumberScore);
            AverageTextField.setText("" + oneDecimal.format(Average));
            BestTextField.setText("" + BestScore);

            TestTextField.requestFocusInWindow();
            TestTextField.selectAll();
    }

public double larger(double BestScore, double Test)
{

    if (BestScore >= Test)
        return BestScore;
    else
        return Test;
    }

        @Override
        public void actionPerformed(java.awt.event.ActionEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }

private class ExitButtonHandler implements ActionListener
{
    public void actionPerformed(ActionEvent e)
    {
        System.exit(0);
    }

        @Override
        public void actionPerformed(java.awt.event.ActionEvent e) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }


    public static void main(String[] args)
    {

    JohnLooney = new A5_JohnLooney();
    JohnLooney.A5_JohnLooney();



    }

}