请用Java语言运用JfreeChart等方法编写完整的代码实现具有GUI基本功能的口算练习程序，该程序能够生成Word格式的习题 ；然后批改习题并存储用户得分；最后实现习题得分的可视化展示

好的，下面是一个完整的Java代码示例，用于实现口算练习程序的基本功能，并生成Word格式的习题，批改习题并存储用户得分，最后实现习题得分的可视化展示。请注意，该程序需要使用JFreeChart等相关库文件，您需要自行下载并配置好Java环境。

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

public class MathExercise {
    private JFrame frame;
    private JTextField num1Field;
    private JTextField num2Field;
    private JTextField resultField;
    private JButton startButton;
    private JButton checkButton;
    private JButton saveButton;
    private JLabel scoreLabel;
    private int score = 0;
    private List<String> exercises = new ArrayList<>();

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    MathExercise window = new MathExercise();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public MathExercise() {
        initialize();
    }

    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 500, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        frame.getContentPane().add(panel, BorderLayout.CENTER);
        panel.setLayout(null);

        JLabel num1Label = new JLabel("数字1：");
        num1Label.setBounds(50, 50, 80, 20);
        panel.add(num1Label);

        num1Field = new JTextField();
        num1Field.setEditable(false);
        num1Field.setBounds(140, 50, 80, 20);
        panel.add(num1Field);
        num1Field.setColumns(10);

        JLabel num2Label = new JLabel("数字2：");
        num2Label.setBounds(250, 50, 80, 20);
        panel.add(num2Label);

        num2Field = new JTextField();
        num2Field.setEditable(false);
        num2Field.setBounds(340, 50, 80, 20);
        panel.add(num2Field);
        num2Field.setColumns(10);

        JLabel resultLabel = new JLabel("结果：");
        resultLabel.setBounds(50, 100, 80, 20);
        panel.add(resultLabel);

        resultField = new JTextField();
        resultField.setBounds(140, 100, 80, 20);
        panel.add(resultField);
        resultField.setColumns(10);

        startButton = new JButton("开始");
        startButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                start();
            }
        });
        startButton.setBounds(50, 150, 80, 20);
        panel.add(startButton);

        checkButton = new JButton("检查");
        checkButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                check();
            }
        });
        checkButton.setEnabled(false);
        checkButton.setBounds(140, 150, 80, 20);
        panel.add(checkButton);

        saveButton = new JButton("保存");
        saveButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                save();
            }
        });
        saveButton.setEnabled(false);
        saveButton.setBounds(230, 150, 80, 20);
        panel.add(saveButton);

        scoreLabel = new JLabel("得分：0");
        scoreLabel.setBounds(50, 200, 80, 20);
        panel.add(scoreLabel);
    }

    private void start() {
        Random random = new Random();
        int num1 = random.nextInt(100);
        int num2 = random.nextInt(100);
        int result = num1 + num2;
        String exercise = num1 + " + " + num2 + " = ";
        num1Field.setText(String.valueOf(num1));
        num2Field.setText(String.valueOf(num2));
        resultField.setText("");
        exercises.add(exercise);
        startButton.setEnabled(false);
        checkButton.setEnabled(true);
        saveButton.setEnabled(true);
    }

    private void check() {
        String resultStr = resultField.getText();
        if (resultStr.equals("")) {
            return;
        }
        int result = Integer.parseInt(resultStr);
        int num1 = Integer.parseInt(num1Field.getText());
        int num2 = Integer.parseInt(num2Field.getText());
        int expected = num1 + num2;
        if (result == expected) {
            score++;
        }
        scoreLabel.setText("得分：" + score);
        startButton.setEnabled(true);
        checkButton.setEnabled(false);
        saveButton.setEnabled(false);
    }

    private void save() {
        try {
            XWPFDocument doc = new XWPFDocument();
            for (String exercise : exercises) {
                XWPFParagraph p = doc.createParagraph();
                XWPFRun r = p.createRun();
                r.setText(exercise);
            }
            File file = new File("exercise.docx");
            FileOutputStream out = new FileOutputStream(file);
            doc.write(out);
            out.close();
            doc.close();
            System.out.println("习题已保存为" + file.getAbsolutePath());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void showChart() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(score, "得分", "");
        JFreeChart chart = ChartFactory.createBarChart("习题得分", "", "得分", dataset, PlotOrientation.VERTICAL, false, false, false);
        ChartPanel chartPanel = new ChartPanel(chart);
        JFrame chartFrame = new JFrame("习题得分");
        chartFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        chartFrame.getContentPane().add(chartPanel, BorderLayout.CENTER);
        chartFrame.pack();
        chartFrame.setVisible(true);
    }
}

该程序采用了Swing编写GUI，可以生成加法习题，并在GUI上进行口算练习，批改答案并存储得分，最后可视化展示习题得分。您可以根据需要进行修改和完善，以满足您的具体需求。