成绩加权平均分计算程序，带UI界面和输入保存功能。

因为本人对成绩的加权均分有所关注，但学校的教务系统查分时往往又不显示个人的加权均分，加之每次手动敲计算器计算很麻烦就花了点时间写了一个加权均分计算程序自用，顺便开源。

UI界面通过Java的Swing类实现。

代码分享：

WeightedAverageCalculatorGUI.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Objects;public class WeightedAverageCalculatorGUI extends JFrame {private JTextField numSubjectsField;private JButton enterButton;private JScrollPane scrollPane;private JPanel inputPanel;private JButton calculateButton;private JLabel resultLabel;private JTextField filePathField;private JButton saveButton;public WeightedAverageCalculatorGUI() {setTitle("成绩加权平均分计算器");setSize(1600, 1200);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocationRelativeTo(null);JPanel panel = new JPanel(new BorderLayout());// 添加科目数量输入框和确定按钮JPanel topPanel = new JPanel(new FlowLayout());JLabel numSubjectsLabel = new JLabel("科目数量：");numSubjectsLabel.setFont(Config.DEFAULT_FONT);numSubjectsField = new JTextField(5);numSubjectsField.setPreferredSize(new Dimension(140, 55));numSubjectsField.setFont(Config.FIELD_FONT);enterButton = new JButton("确定");enterButton.setFont(Config.DEFAULT_FONT);topPanel.add(numSubjectsLabel);topPanel.add(numSubjectsField);topPanel.add(enterButton);panel.add(topPanel, BorderLayout.NORTH);// 添加文件路径输入框和保存按钮JPanel bottomPanel = new JPanel(new FlowLayout());JLabel filePathLabel = new JLabel("文件保存路径：");filePathLabel.setFont(Config.DEFAULT_FONT);filePathField = new JTextField(20);filePathField.setFont(Config.FIELD_FONT);saveButton = new JButton("保存");saveButton.setFont(Config.DEFAULT_FONT);bottomPanel.add(filePathLabel);bottomPanel.add(filePathField);bottomPanel.add(saveButton);panel.add(bottomPanel, BorderLayout.SOUTH);// 添加事件监听器以响应确定按钮点击事件enterButton.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(!Objects.equals(numSubjectsField.getText(), "")) {int numSubjects = Integer.parseInt(numSubjectsField.getText());createInputPanel(numSubjects);revalidate();}}});// 添加事件监听器以响应保存按钮点击事件saveButton.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {saveToFile();}});add(panel, BorderLayout.NORTH);setVisible(true);}private void createInputPanel(int numSubjects) {if (scrollPane != null) {getContentPane().remove(scrollPane);}inputPanel = new JPanel();inputPanel.setLayout(new GridLayout(0, 2));// 添加成绩和权重输入框Font labelFont = Config.DEFAULT_FONT;Font fieldFont = Config.FIELD_FONT;for (int i = 1; i <= numSubjects; i++) {JLabel scoreLabel = new JLabel("科目 " + i + " 成绩：");scoreLabel.setFont(labelFont);JTextField scoreField = new JTextField(5);scoreField.setFont(fieldFont);JLabel weightLabel = new JLabel("权重：");weightLabel.setFont(labelFont);JTextField weightField = new JTextField(10);weightField.setFont(fieldFont);inputPanel.add(scoreLabel);inputPanel.add(scoreField);inputPanel.add(weightLabel);inputPanel.add(weightField);}// 添加计算按钮和结果标签calculateButton = new JButton("计算");calculateButton.setFont(Config.DEFAULT_FONT);calculateButton.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {calculateWeightedAverage(numSubjects);}});inputPanel.add(calculateButton);resultLabel = new JLabel();inputPanel.add(resultLabel);scrollPane = new JScrollPane(inputPanel);scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);getContentPane().add(scrollPane, BorderLayout.CENTER);revalidate();}private void calculateWeightedAverage(int numSubjects) {try {double totalWeightedScore = 0;double totalWeight = 0;resultLabel.setFont(Config.DEFAULT_FONT);resultLabel.setForeground(Color.RED);Component[] components = inputPanel.getComponents();for (int i = 0; i < numSubjects; i++) {JTextField scoreField = (JTextField) components[i * 4 + 1];JTextField weightField = (JTextField) components[i * 4 + 3];double score = Double.parseDouble(scoreField.getText());double weight = Double.parseDouble(weightField.getText());totalWeightedScore += score * weight;totalWeight += weight;}double weightedAverage = totalWeightedScore / totalWeight;resultLabel.setText("加权平均分：" + String.format("%.6f", weightedAverage));// 保存结果到文件
//            saveToFile();} catch (NumberFormatException e) {resultLabel.setText("输入格式错误，请重新输入！");}}private void saveToFile() {String filePath = filePathField.getText() + Config.SAVE_PATH + System.currentTimeMillis() + ".txt";try {File file = new File(filePath);FileWriter writer = new FileWriter(file);writer.write("科目 | 成绩 | 权重\n");if(inputPanel == null) {JOptionPane.showMessageDialog(this, "请先输入成绩和权重进行计算！");return;}Component[] components = inputPanel.getComponents();for (int i = 0; i < components.length / 4; i++) {JTextField scoreField = (JTextField) components[i * 4 + 1];JTextField weightField = (JTextField) components[i * 4 + 3];double score = Double.parseDouble(scoreField.getText());double weight = Double.parseDouble(weightField.getText());writer.write("科目 " + (i + 1) + " | " + score + " | " + weight + "\n");}writer.write("\n");writer.write(resultLabel.getText());writer.close();JOptionPane.showMessageDialog(this, "文件保存成功！");} catch (IOException e) {JOptionPane.showMessageDialog(this, "保存文件时发生错误：" + e.getMessage());}}public static void main(String[] args) {UIManager.put("OptionPane.messageFont", Config.FIELD_FONT);// 设置全局对话框确认按钮大小UIManager.put("OptionPane.buttonFont", Config.FIELD_FONT);// 显示对话框SwingUtilities.invokeLater(new Runnable() {@Overridepublic void run() {new WeightedAverageCalculatorGUI();}});}
}

Config.java

import java.awt.*;public class Config {public static final int FONT_SIZE = 30;public static final String FONT_NAME = "Microsoft YaHei";public static final Font DEFAULT_FONT = new Font(FONT_NAME, Font.BOLD, FONT_SIZE);public static final Font FIELD_FONT = new Font(FONT_NAME, Font.PLAIN, FONT_SIZE);public static final String SAVE_PATH = "\\WeightAverageRecord";
}

相关代码以及jar包已开源至GitHub仓库，包括Config.java、WeightedAverageCalculatorGUI.java和WeightedAverageCalculator.jar。

GitHub地址：https://github.com/wyd333/WeightedAverageCalculator?tab=readme-ov-filehttps://github.com/wyd333/WeightedAverageCalculator?tab=readme-ov-file

如果需要要对代码进行操作，直接拷贝Config.java和WeightedAverageCalculatorGUI.java文件到Project的src目录下（这两个文件最好放在同一目录下），运行WeightedAverageCalculatorGUI.java即可。

如果只是使用功能而无需代码操作，运行WeightedAverageCalculator.jar即可。确定配置过Java环境变量后，直接cmd打开命令行窗口，执行命令：

java -jar WeightedAverageCalculator.jar的绝对路径

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