我的天气数据java程序在eclipse中出现问题

我正在尝试获取计算windchill的代码，但它不起作用。我希望计算完成后显示在单独的窗口中

此外，我需要程序有一个单独的错误对话框出现时，无效的数据输入或风寒是无效的，在GUI中的文本应该反映问题。选择“文件输入”按钮时，应显示文件选择窗口。文件打开错误将通过异常和对话框进行处理。如果文件有效并成功打开，程序将读取数据，计算结果，并在通过单独的类和Java文件创建的单独窗口中以列形式显示数据和结果，并绘制温度和风寒值

代码：

}

---

}我认为这个答案不能满足OP的要求。我希望其他人能从中学习

下面是我对代码所做的更改

我使用了

JFrame

。我没有扩展

JFrame

。当您想要覆盖其中一个类方法时，您只能扩展Swing组件或任何Java类

我创建了GUI，让用户有机会在计算风速之前键入值

我消除了所有的绝对定位，并使用了。我创建了一个主

JPanel

和两个从属

JPanel

s，一个用来保存标签和文本字段，另一个用来保存按钮。主面板使用

BorderLayout

，标签和文本字段面板使用

GridBagLayout

，按钮面板使用

GridBagLayout

，因此按钮将水平扩展以填充该区域

我在代码中使用了camelCase变量名

下面是GUI结果

我格式化了代码，以便更容易看到方法和类

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;

public class WindChillCalculations {

    private JPanel contentPane;
    private JTextField fahrenheit_textField;
    private JTextField mph_textField;
    private JTextField dewPoint_textField;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {       
                    new WindChillCalculations();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public WindChillCalculations() {
        // top, left, bottom, right
        Insets topInsets = new Insets(10, 10, 10, 10);
        Insets topRightInsets = new Insets(10, 0, 10, 10);
        Insets insets = new Insets(0, 10, 10, 10);
        Insets rightInsets = new Insets(0, 0, 10, 10);

        Color textColor = new Color(255, 140, 0);

        JFrame frame = new JFrame();
        frame.setTitle("Weather Data Program - "
                + "Wind Chill Calculations");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        contentPane = new JPanel();
        contentPane.setForeground(Color.WHITE);
        contentPane.setBackground(Color.BLACK);
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout());

        JLabel windChillCalculationsLabel = new JLabel(
                "Wind Chill Calculations");
        windChillCalculationsLabel.setFont(new Font(
                "Tahoma", Font.BOLD, 12));
        windChillCalculationsLabel.setForeground(Color.WHITE);
        windChillCalculationsLabel.setHorizontalAlignment(
                JLabel.CENTER);
        contentPane.add(windChillCalculationsLabel, 
            BorderLayout.BEFORE_FIRST_LINE);

        JPanel panel = new JPanel();
        panel.setToolTipText("");
        panel.setBorder(new LineBorder(Color.WHITE));
        panel.setForeground(Color.BLACK);
        panel.setBackground(Color.BLACK);
        panel.setLayout(new GridBagLayout());

        int gridy = 0;

        JLabel fahrenheit_Label = new JLabel("Enter the "
                + "temperature in degrees Fahrenheit:");
        fahrenheit_Label.setForeground(textColor);
        addComponent(panel, fahrenheit_Label, 0, gridy, 1, 1, 
                topInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        fahrenheit_textField = new JTextField(15);
        fahrenheit_textField.setHorizontalAlignment(
                JTextField.RIGHT);
        addComponent(panel, fahrenheit_textField, 1, gridy++, 1, 1, 
                topRightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        JLabel mph_Label = new JLabel("Enter the wind "
                + "speed in mph:");
        mph_Label.setForeground(textColor);
        addComponent(panel, mph_Label, 0, gridy, 1, 1, 
                insets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        mph_textField = new JTextField(15);
        mph_textField.setHorizontalAlignment(JTextField.RIGHT);
        addComponent(panel, mph_textField, 1, gridy++, 1, 1, 
                rightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        JLabel dewPoint_Label = new JLabel("Enter the "
                + "dew point in degrees Fahrenheit:");
        dewPoint_Label.setForeground(textColor);
        addComponent(panel, dewPoint_Label, 0, gridy, 1, 1, 
                insets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        dewPoint_textField = new JTextField(15);
        dewPoint_textField.setHorizontalAlignment(
                JTextField.RIGHT);
        addComponent(panel, dewPoint_textField, 1, gridy++, 1, 1, 
                rightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        contentPane.add(panel, BorderLayout.CENTER);

        JPanel buttonPanel = new JPanel();
        buttonPanel.setBackground(Color.BLACK);
        buttonPanel.setForeground(Color.BLACK);
        buttonPanel.setLayout(new GridBagLayout());

        JButton fileEntry_btn = new JButton("File Entry");
        fileEntry_btn.setBackground(Color.BLACK);
        fileEntry_btn.setForeground(textColor);
        addComponent(buttonPanel, fileEntry_btn, 0, 0, 1, 1, 
                topInsets, GridBagConstraints.CENTER,
                GridBagConstraints.HORIZONTAL);

        JButton compute_btn = new JButton("Compute");
        compute_btn.setForeground(textColor);
        compute_btn.setBackground(Color.BLACK);
        compute_btn.setBounds(301, 283, 89, 23);
        addComponent(buttonPanel, compute_btn, 1, 0, 1, 1, 
                topRightInsets, GridBagConstraints.CENTER,
                GridBagConstraints.HORIZONTAL);

        compute_btn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String fahrenheit = fahrenheit_textField.getText();
                String speed = mph_textField.getText();
                String dewpoint = dewPoint_textField.getText();

                try {
                    double f = Double.valueOf(fahrenheit);
                    double s = Double.valueOf(speed);
                    double d = Double.valueOf(dewpoint);
                    WindChill windChill = new WindChill(f, s, d);
                    double answer = windChill.calculateWindChill();

                    //TODO Create output display
                    System.out.println(answer);
                } catch (NumberFormatException e1) {
                    e1.printStackTrace();
                }
            }
        });

        contentPane.add(buttonPanel, BorderLayout.AFTER_LAST_LINE);

        frame.add(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    private void addComponent(Container container, 
            Component component, int gridx, int gridy, 
            int gridwidth, int gridheight, Insets insets, 
            int anchor, int fill) {
        GridBagConstraints gbc = new GridBagConstraints(
                gridx, gridy, gridwidth, gridheight, 
                1.0, 1.0, anchor, fill, insets, 0, 0);
        container.add(component, gbc);
    }

    public class WindChill {

        private final double temperature;
        private final double windSpeed;
        private final double dewPoint;

        public WindChill(double temperature, double windSpeed, 
                double dewPoint) {
            this.temperature = temperature;
            this.windSpeed = windSpeed;
            this.dewPoint = dewPoint;
        }

        public double calculateWindChill() {
            double factor = Math.pow(windSpeed, 0.16);
            return 35.74d + (0.6215d * temperature) - 
                    (35.75d * (factor)) + 
                    (0.4275 * (dewPoint * (factor)));
        }

    }
}

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;

public class WindChillCalculations {

    private JPanel contentPane;
    private JTextField fahrenheit_textField;
    private JTextField mph_textField;
    private JTextField dewPoint_textField;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {       
                    new WindChillCalculations();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public WindChillCalculations() {
        // top, left, bottom, right
        Insets topInsets = new Insets(10, 10, 10, 10);
        Insets topRightInsets = new Insets(10, 0, 10, 10);
        Insets insets = new Insets(0, 10, 10, 10);
        Insets rightInsets = new Insets(0, 0, 10, 10);

        Color textColor = new Color(255, 140, 0);

        JFrame frame = new JFrame();
        frame.setTitle("Weather Data Program - "
                + "Wind Chill Calculations");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        contentPane = new JPanel();
        contentPane.setForeground(Color.WHITE);
        contentPane.setBackground(Color.BLACK);
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout());

        JLabel windChillCalculationsLabel = new JLabel(
                "Wind Chill Calculations");
        windChillCalculationsLabel.setFont(new Font(
                "Tahoma", Font.BOLD, 12));
        windChillCalculationsLabel.setForeground(Color.WHITE);
        windChillCalculationsLabel.setHorizontalAlignment(
                JLabel.CENTER);
        contentPane.add(windChillCalculationsLabel, 
            BorderLayout.BEFORE_FIRST_LINE);

        JPanel panel = new JPanel();
        panel.setToolTipText("");
        panel.setBorder(new LineBorder(Color.WHITE));
        panel.setForeground(Color.BLACK);
        panel.setBackground(Color.BLACK);
        panel.setLayout(new GridBagLayout());

        int gridy = 0;

        JLabel fahrenheit_Label = new JLabel("Enter the "
                + "temperature in degrees Fahrenheit:");
        fahrenheit_Label.setForeground(textColor);
        addComponent(panel, fahrenheit_Label, 0, gridy, 1, 1, 
                topInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        fahrenheit_textField = new JTextField(15);
        fahrenheit_textField.setHorizontalAlignment(
                JTextField.RIGHT);
        addComponent(panel, fahrenheit_textField, 1, gridy++, 1, 1, 
                topRightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        JLabel mph_Label = new JLabel("Enter the wind "
                + "speed in mph:");
        mph_Label.setForeground(textColor);
        addComponent(panel, mph_Label, 0, gridy, 1, 1, 
                insets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        mph_textField = new JTextField(15);
        mph_textField.setHorizontalAlignment(JTextField.RIGHT);
        addComponent(panel, mph_textField, 1, gridy++, 1, 1, 
                rightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        JLabel dewPoint_Label = new JLabel("Enter the "
                + "dew point in degrees Fahrenheit:");
        dewPoint_Label.setForeground(textColor);
        addComponent(panel, dewPoint_Label, 0, gridy, 1, 1, 
                insets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        dewPoint_textField = new JTextField(15);
        dewPoint_textField.setHorizontalAlignment(
                JTextField.RIGHT);
        addComponent(panel, dewPoint_textField, 1, gridy++, 1, 1, 
                rightInsets, GridBagConstraints.LINE_START,
                GridBagConstraints.HORIZONTAL);

        contentPane.add(panel, BorderLayout.CENTER);

        JPanel buttonPanel = new JPanel();
        buttonPanel.setBackground(Color.BLACK);
        buttonPanel.setForeground(Color.BLACK);
        buttonPanel.setLayout(new GridBagLayout());

        JButton fileEntry_btn = new JButton("File Entry");
        fileEntry_btn.setBackground(Color.BLACK);
        fileEntry_btn.setForeground(textColor);
        addComponent(buttonPanel, fileEntry_btn, 0, 0, 1, 1, 
                topInsets, GridBagConstraints.CENTER,
                GridBagConstraints.HORIZONTAL);

        JButton compute_btn = new JButton("Compute");
        compute_btn.setForeground(textColor);
        compute_btn.setBackground(Color.BLACK);
        compute_btn.setBounds(301, 283, 89, 23);
        addComponent(buttonPanel, compute_btn, 1, 0, 1, 1, 
                topRightInsets, GridBagConstraints.CENTER,
                GridBagConstraints.HORIZONTAL);

        compute_btn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String fahrenheit = fahrenheit_textField.getText();
                String speed = mph_textField.getText();
                String dewpoint = dewPoint_textField.getText();

                try {
                    double f = Double.valueOf(fahrenheit);
                    double s = Double.valueOf(speed);
                    double d = Double.valueOf(dewpoint);
                    WindChill windChill = new WindChill(f, s, d);
                    double answer = windChill.calculateWindChill();

                    //TODO Create output display
                    System.out.println(answer);
                } catch (NumberFormatException e1) {
                    e1.printStackTrace();
                }
            }
        });

        contentPane.add(buttonPanel, BorderLayout.AFTER_LAST_LINE);

        frame.add(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    private void addComponent(Container container, 
            Component component, int gridx, int gridy, 
            int gridwidth, int gridheight, Insets insets, 
            int anchor, int fill) {
        GridBagConstraints gbc = new GridBagConstraints(
                gridx, gridy, gridwidth, gridheight, 
                1.0, 1.0, anchor, fill, insets, 0, 0);
        container.add(component, gbc);
    }

    public class WindChill {

        private final double temperature;
        private final double windSpeed;
        private final double dewPoint;

        public WindChill(double temperature, double windSpeed, 
                double dewPoint) {
            this.temperature = temperature;
            this.windSpeed = windSpeed;
            this.dewPoint = dewPoint;
        }

        public double calculateWindChill() {
            double factor = Math.pow(windSpeed, 0.16);
            return 35.74d + (0.6215d * temperature) - 
                    (35.75d * (factor)) + 
                    (0.4275 * (dewPoint * (factor)));
        }

    }
}