GUI Array help...test score program

[VettesRus]

Hello,

I am tyring to make a GUI program that gets 5 test scores from the user, stores them into an array, then has a few check boxes to display average, min, max, letter grade etc... I cannot figure out how to get the test scores which are entered to be stored in the array.

Also I cannot figure out how to get my reset button to clear the check boxes. My code is below. I appreciate any help.

import javax.swing.*;
import java.awt.*;
import java.util.Scanner;


public class TextField extends JPanel
{
	private JTextField[] inputBox;
	double testGrade;


	public TextField()
	{
		setLayout(new GridLayout(1,5));
		inputBox = new JTextField[5];

		setBorder(BorderFactory.createTitledBorder("Test Scores"));

		for (int i = 0; i < inputBox.length; i++)
		{
			inputBox[i] = new JTextField();


			add(inputBox[i]);
		}
	}
}

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

public class TestCalculator extends JFrame
{
	private StatisticsPanel stats;
	private JPanel buttonPanel;
	private JButton calcButton;
	private JButton resetButton;

	public TestCalculator()
	{
		setTitle(" ");

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		setLayout(new BorderLayout());

		stats = new StatisticsPanel();
		TextField inputBox = new TextField();

		buildButtonPanel();

		add(inputBox, BorderLayout.NORTH);
		add(stats, BorderLayout.CENTER);
		add(buttonPanel, BorderLayout.SOUTH);

		pack();
		setVisible(true);
	}


	private void buildButtonPanel()
	{
		buttonPanel = new JPanel();

		calcButton = new JButton("Calculate Statistics");
		resetButton = new JButton("Reset");

		calcButton.addActionListener(new CalcButtonListener());
		resetButton.addActionListener(new ResetButtonListener());

		buttonPanel.add(calcButton);
		buttonPanel.add(resetButton);
	}

	private class CalcButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			double average, max, min;

			JOptionPane.showMessageDialog(null, "STATISTICS:" +
													"\nAverage: " +
													"\nMaximum: " + "\nMinimum: "
													+ "\nLetter Grade: ");

		}
	}

	private class ResetButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			if (e.getSource() == true)
			{

				e.setSource(false);
			}

		}
	}
}

import javax.swing.*;
import java.awt.*;

public class StatisticsPanel extends JPanel
{
	private JRadioButton dropLowest;
	private JCheckBox average;
	private JCheckBox max;
	private JCheckBox min;
	private JCheckBox letterGrade;

	private ButtonGroup bg;


	public StatisticsPanel()
	{

		setLayout(new GridLayout(5,1));



		dropLowest = new JRadioButton("Average Drops Lowest Test");

		bg = new ButtonGroup();
		bg.add(dropLowest);

		average = new JCheckBox("Average");
		max = new JCheckBox("Maximum");
		min = new JCheckBox("Minimum");
		letterGrade = new JCheckBox("Letter Grade");

		setBorder(BorderFactory.createTitledBorder("Statistics"));

		add(dropLowest);
		add(average);
		add(max);
		add(min);
		add(letterGrade);
	}
}

public class Calculator
{
	public static void main(String[] args)
	{
		new TestCalculator();
	}
}

[cselic]

Let's make at first RESET button workable.

1. In your TextField class:

a) write method getInputBox that returns JTextField[] variable inputBox

b) write method getInputBoxAtIndex(int index) that returns variable inputBox at current index

c) write method getInputBoxLength that returns lenght or inputBox variable

2. In your class TestCalculator add one line of code, and put a comment tags on one line of code, or delete that line of code:

public class TestCalculator extends JFrame {
	private StatisticsPanel stats;
	private JPanel buttonPanel;
	private JButton calcButton;
	private JButton resetButton;
	private TextField inputBox = new TextField(); // add this line of code
	
	public TestCalculator() {
		setTitle(" ");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLayout(new BorderLayout());
		
		stats = new StatisticsPanel();
		// TextField inputBox = new TextField(); put comment on this line of code or delete this line of code

3. in your private class ResetButtonListener delete your code in method actionPerformed. It should be something like this:

       private class ResetButtonListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			
		}
	}

4. Write code it actionPerformed method:

a) loop index from 0 to inputBox lenght (you have already written that method in 1. c) )

b) inside that loop get inputBoxAtIndex(index) (you have already written that method in 1. b) ) and setText to "";

[VettesRus]

I just do not understand where the ScorePanel() comes from. Dont I need a ScorePanel class for that to work?

[cselic]

^Sorry, everywhere where you see ScorePanel change it with TextField. Working with your code I have changed name of your TextField class with new name ScorePanel because I like that name more, but nevermind.

[VettesRus]

So I think I am on the right track, but I cannot get my findMaximum to compare the grades. I get a compiler error that says

error: cannot find symbol
if( grade[i].getGrade().compareTo( maxValue.getGrade()) > 0)
^
symbol: method compareTo(JTextField)
location: class JTextField
1 error

Tool completed with exit code 1

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

public class TestCalculator extends JFrame
{
	private StatisticsPanel stats;
	private JPanel buttonPanel;
	private JButton calcButton;
	private JButton resetButton;

	TextField[] inputBox = new TextField[5];

	public TestCalculator()
	{
		setTitle("");

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		setLayout(new BorderLayout());

		stats = new StatisticsPanel();
		TextField inputBox = new TextField();

		buildButtonPanel();

		add(inputBox, BorderLayout.NORTH);
		add(stats, BorderLayout.CENTER);
		add(buttonPanel, BorderLayout.SOUTH);

		pack();
		setVisible(true);
	}


	private void buildButtonPanel()
	{
		buttonPanel = new JPanel();

		calcButton = new JButton("Calculate Statistics");
		resetButton = new JButton("Reset");

		calcButton.addActionListener(new CalcButtonListener());
		resetButton.addActionListener(new ResetButtonListener());

		buttonPanel.add(calcButton);
		buttonPanel.add(resetButton);
	}

	public static void findMaximum(TextField[] grade)
	{
		TextField maxValue = grade[0];

		for( int i = 0; i < grade.length; i++ )
		{
			if( grade[i].getGrade().compareTo( maxValue.getGrade()) > 0)
			{
				// Store new high grade into maxValue
				maxValue = grade[i];
			}
		}

	}

	public static void findMinimum()
	{
	}

	public static void findAverage()
	{
	}

	public static void findLetterGrade()
	{
	}



	private class CalcButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			double average, max, min;


			JOptionPane.showMessageDialog(null, "STATISTICS:" +
													"\nAverage: " +
													"\nMaximum: " + "\nMinimum: "
													+ "\nLetter Grade: ");

		}
	}

	private class ResetButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			for( int i = 0; i < inputBox.length; i++ )
			{

			}


		}
	}

}

import javax.swing.*;
import java.awt.*;
import java.util.Scanner;


public class TextField extends JPanel
{
	private JTextField[] inputBox;
	JTextField grade;

	public TextField()
	{
		setLayout(new GridLayout(1,5));
		inputBox = new JTextField[5];

		setBorder(BorderFactory.createTitledBorder("Test Scores"));

		for (int i = 0; i < inputBox.length; i++)
		{
			inputBox[i] = new JTextField();

			add(inputBox[i]);
		}
	}

	public JTextField getGrade()
	{
		JTextField grade = inputBox[0];

		for (int i = 0; i < inputBox.length; i++ )
		{

			grade = inputBox[i];

		}

		return grade;
	}

}