Designed for ease of use for builders and trades people 8 by 4 foot calculator

package CalcDimensions;


/* To run this file after compiling  with net beans use this syntax java -jar "CalulateEightByFour.jar"

/* Written  by MD Harrington  London  Kent DA6 8NP
* Program is designed to assist builders ground worker in working out sheets of 8 by 4 foot wood ,
* and plastic coverings for maintenance
* Please see other links
* https://www.facebook.com/mark.harrington.14289
* https://www.instagram.com/markukh2021
* https://pastebin.com/u/Mark2020H
* https://codeshare.io/codes
* https://github.com/markh2016?tab=repositories
*/

import javax.swing.*;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Calc8by4 {

    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
        } catch (UnsupportedLookAndFeelException | ClassNotFoundException | InstantiationException | IllegalAccessException e) {
        }


        // Create the main frame
        JFrame frame = new JFrame("Wall Measurement Calculator");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(600, 700);
        frame.setLocationRelativeTo(null);

        // Create components
        JLabel instructionsLabel = new JLabel("Enter dimensions (e.g., 161cm * 93cm):");
        JTextArea inputTextArea = new JTextArea(10, 40);
        JScrollPane inputScrollPane = new JScrollPane(inputTextArea);
        JButton convertButton = new JButton("Convert to Inches");
        JButton clearButton = new JButton("Clear");
        JTextArea outputTextArea = new JTextArea(10, 40);
        outputTextArea.setEditable(false);
        JScrollPane outputScrollPane = new JScrollPane(outputTextArea);
        JLabel totalSquareInchesLabel = new JLabel("Total Square Area (sq in):");
        JTextField totalSquareInchesField = new JTextField(15);
        totalSquareInchesField.setEditable(false);
        JLabel totalSquareFeetLabel = new JLabel("Total Square Area (sq ft):");
        JTextField totalSquareFeetField = new JTextField(15);
        totalSquareFeetField.setEditable(false);
        JLabel sheetsRequiredLabel = new JLabel("Number of Sheets Required:");
        JTextField sheetsRequiredField = new JTextField(15);
        sheetsRequiredField.setEditable(false);

        // Menu Bar
        JMenuBar menuBar = new JMenuBar();

        // File Menu
        JMenu fileMenu = new JMenu("File");
        JMenuItem saveResultsItem = new JMenuItem("Save Results to File");
        JMenuItem exitItem = new JMenuItem("Exit");
        fileMenu.add(saveResultsItem);
        fileMenu.add(exitItem);

        // About Menu
        JMenu aboutMenu = new JMenu("About");
        JMenuItem aboutItem = new JMenuItem("About");
        aboutMenu.add(aboutItem);

        // Look and Feel Menu
        JMenu lookAndFeelMenu = new JMenu("Set Look and Feel");
        UIManager.LookAndFeelInfo[] looks = UIManager.getInstalledLookAndFeels();
        for (UIManager.LookAndFeelInfo look : looks) {
            JMenuItem lookItem = new JMenuItem(look.getName());
            lookAndFeelMenu.add(lookItem);
            lookItem.addActionListener(e -> {
                try {
                    UIManager.setLookAndFeel(look.getClassName());
                    SwingUtilities.updateComponentTreeUI(frame);
                } catch (ClassNotFoundException | IllegalAccessException | InstantiationException | UnsupportedLookAndFeelException ex) {
                    JOptionPane.showMessageDialog(frame, "Failed to apply look and feel.");
                }
            });
        }

        // Add menus to menu bar
        menuBar.add(fileMenu);
        menuBar.add(aboutMenu);
        menuBar.add(lookAndFeelMenu);
        frame.setJMenuBar(menuBar);

        // Layout the components
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        panel.add(instructionsLabel);
        panel.add(inputScrollPane);
        panel.add(convertButton);
        panel.add(clearButton);
        panel.add(new JLabel("Converted Dimensions in Inches:"));
        panel.add(outputScrollPane);
        panel.add(totalSquareInchesLabel);
        panel.add(totalSquareInchesField);
        panel.add(totalSquareFeetLabel);
        panel.add(totalSquareFeetField);
        panel.add(sheetsRequiredLabel);
        panel.add(sheetsRequiredField);

        frame.add(panel);
        frame.setVisible(true);

        // Button action listeners
        convertButton.addActionListener(e -> {
            String input = inputTextArea.getText();
            String[] lines = input.split("\n");
            double totalSquareInches = 0;
            StringBuilder output = new StringBuilder();

            for (String line : lines) {
                line = line.trim();
                if (line.matches("\\d+cm\\s*\\*\\s*\\d+cm")) {
                    String[] parts = line.split("\\*");
                    double widthCm = Double.parseDouble(parts[0].replace("cm", "").trim());
                    double heightCm = Double.parseDouble(parts[1].replace("cm", "").trim());
                    double widthIn = widthCm * 0.393701;
                    double heightIn = heightCm * 0.393701;
                    double areaIn = widthIn * heightIn;
                    totalSquareInches += areaIn;
                    output.append(String.format("%s = %.2f in * %.2f in = %.2f sq in \n", line, widthIn, heightIn, areaIn));
                } else {
                    output.append(String.format("Invalid input: %s\n", line));
                }
            }

            double totalSquareFeet = totalSquareInches / 144;
            int sheetsRequired = (int) Math.ceil(totalSquareFeet / 32); // Each sheet is 32 sq ft (8x4 ft)

            // Display results
            outputTextArea.setText(output.toString());
            totalSquareInchesField.setText(String.format("%.2f", totalSquareInches));
            totalSquareFeetField.setText(String.format("%.2f", totalSquareFeet));
            sheetsRequiredField.setText(String.valueOf(sheetsRequired));
        });

        clearButton.addActionListener(e -> {
            inputTextArea.setText("");
            outputTextArea.setText("");
            totalSquareInchesField.setText("");
            totalSquareFeetField.setText("");
            sheetsRequiredField.setText("");
        });

        saveResultsItem.addActionListener(e -> {
    // Open file chooser
     JFileChooser fileChooser = new JFileChooser();
        fileChooser.setDialogTitle("Save Results");
         fileChooser.setFileFilter(new FileNameExtensionFilter("Text Files", "txt"));
             fileChooser.setAcceptAllFileFilterUsed(false);

        int userSelection = fileChooser.showSaveDialog(frame);
        if (userSelection == JFileChooser.APPROVE_OPTION) {
            // Get the selected file path
            String filePath = fileChooser.getSelectedFile().getAbsolutePath();
            if (!filePath.endsWith(".txt")) {
                filePath += ".txt"; // Ensure the file ends with .txt extension
            }

            try (FileWriter writer = new FileWriter(filePath)) {
                writer.write("Input Dimensions:\n");
                writer.write(inputTextArea.getText() + "\n\n");
                writer.write("Converted Dimensions:\n");
                writer.write(outputTextArea.getText() + "\n");
                writer.write("Total Square Inches: " + totalSquareInchesField.getText() + "\n");
                writer.write("Total Square Feet: " + totalSquareFeetField.getText() + "\n");
                writer.write("Sheets Required: " + sheetsRequiredField.getText() + "\n");
                JOptionPane.showMessageDialog(frame, "Results saved to " + filePath);
            } catch (IOException ex) {
                JOptionPane.showMessageDialog(frame, "Error saving results: " + ex.getMessage());
            }
        }
    });


        exitItem.addActionListener(e -> System.exit(0));

        aboutItem.addActionListener(e -> {
            JOptionPane.showMessageDialog(frame, "Coded by Mark Harrington\nLondon, Kent\nDA6 8NP", "About", JOptionPane.INFORMATION_MESSAGE);
        });
    }
}