本文章主要是CSDN-问答板块，有题主提出的问题，我这边将完整代码提供出来，仅供大家参考学习！

 

一、效果截图

 

 

二、直接上代码

package com.example.dingtalk.question;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

/***
 * 小学计算题生成
 */
public class MathExerciseGenerator extends JFrame {
    private JComboBox<String> operationComboBox;
    private JButton generateButton;
    private JButton evaluateButton;
    private JButton showAnswersButton;
    private JTextArea questionArea;
    private JTextField answerField;

    public MathExerciseGenerator() {
        super("小学生数学练习题目生成系统");
        initComponents();
    }

    private void initComponents() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        operationComboBox = new JComboBox<>(new String[]{"10以内加法", "10以内减法", "20以内加法", "20以内减法", "100以内加法", "100以内减法", "100以内乘法", "100以内除法"});
        generateButton = new JButton("出题");
        evaluateButton = new JButton("评卷");
        showAnswersButton = new JButton("答案");
        questionArea = new JTextArea(20, 40);
        answerField = new JTextField(10);

        JPanel topPanel = new JPanel();
        topPanel.add(new JLabel("选择题目类型: "));
        topPanel.add(operationComboBox);
        topPanel.add(generateButton);
        topPanel.add(evaluateButton);
        topPanel.add(showAnswersButton);

        add(topPanel, BorderLayout.NORTH);
        add(new JScrollPane(questionArea), BorderLayout.CENTER);
        add(answerField, BorderLayout.SOUTH);

        generateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                generateQuestions();
            }
        });

        evaluateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                evaluateAnswers();
            }
        });

        showAnswersButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                showAnswers();
            }
        });

        pack();
        setLocationRelativeTo(null);
    }

    private void generateQuestions() {
        int numQuestions = 20;
        String operation = (String) operationComboBox.getSelectedItem();
        StringBuilder questions = new StringBuilder();
        StringBuilder answers = new StringBuilder();  // 用于存储答案

        Random random = new Random();

        for (int i = 0; i < numQuestions; i++) {
            int operand1 = random.nextInt(100) + 1;
            int operand2 = random.nextInt(100) + 1;
            String question = "";

            switch (operation) {
                case "10以内加法":
                    operand1 = random.nextInt(10) + 1;
                    operand2 = random.nextInt(10) + 1;
                    question = operand1 + " + " + operand2 + " = ";
                    break;
                case "10以内减法":
                    operand1 = random.nextInt(10) + 1;
                    operand2 = random.nextInt(operand1) + 1;
                    question = operand1 + " - " + operand2 + " = ";
                    break;
                case "20以内加法":
                    operand1 = random.nextInt(20) + 1;
                    operand2 = random.nextInt(20) + 1;
                    question = operand1 + " + " + operand2 + " = ";
                    break;
                case "20以内减法":
                    operand1 = random.nextInt(20) + 1;
                    operand2 = random.nextInt(operand1) + 1;
                    question = operand1 + " - " + operand2 + " = ";
                    break;
                case "100以内加法":
                    operand1 = random.nextInt(100) + 1;
                    operand2 = random.nextInt(100) + 1;
                    question = operand1 + " + " + operand2 + " = ";
                    break;
                case "100以内减法":
                    operand1 = random.nextInt(100) + 1;
                    operand2 = random.nextInt(operand1) + 1;
                    question = operand1 + " - " + operand2 + " = ";
                    break;
                case "100以内乘法":
                    operand1 = random.nextInt(100) + 1;
                    operand2 = random.nextInt(100) + 1;
                    question = operand1 + " * " + operand2 + " = ";
                    break;
                case "100以内除法":
                    operand2 = random.nextInt(100) + 1;
                    operand1 = operand2 * (random.nextInt(10) + 1);
                    question = operand1 + " / " + operand2 + " = ";
                    break;
                default:
                    break;
            }

            questions.append(question).append("\n");

            // 生成并附加答案
            int result = calculateResult(operand1 + " " + getOperationSymbol(operation) + " " + operand2);
            answers.append(result).append("\n");
        }
        questionArea.setText(questions.toString());
        answerField.setText(answers.toString());  // 将答案设置到答案文本框
    }
    // 获取操作符
    private String getOperationSymbol(String operation) {
        switch (operation) {
            case "10以内加法":
            case "20以内加法":
            case "100以内加法":
                return "+";
            case "10以内减法":
            case "20以内减法":
            case "100以内减法":
                return "-";
            case "100以内乘法":
                return "*";
            case "100以内除法":
                return "/";
            default:
                return "";
        }
    }

    private void evaluateAnswers() {
        String[] answers = questionArea.getText().split("\n");
        String[] userResponses = answerField.getText().split(" ");
        StringBuilder evaluation = new StringBuilder();

        for (int i = 0; i < answers.length; i++) {
            if (i < userResponses.length) {
                String answer = extractAnswer(answers[i].trim()); // 从完整表达式中提取答案部分
                String userAnswer = userResponses[i].trim();
                String result = answer.equals(userAnswer) ? "√" : "x";
                evaluation.append(result).append("\n");
            }
        }

        JOptionPane.showMessageDialog(this, evaluation.toString(), "评卷结果", JOptionPane.INFORMATION_MESSAGE);
    }

    // 从完整表达式中提取答案部分
    private String extractAnswer(String fullExpression) {
        // 以等号分割表达式，并取第二部分作为答案
        String[] parts = fullExpression.split("=");
        if (parts.length == 2) {
            return parts[1].trim();
        } else {
            return "";
        }
    }


    private void showAnswers() {
        String[] questions = questionArea.getText().split("\n");
        StringBuilder correctAnswers = new StringBuilder();

        for (String question : questions) {
            String[] parts = question.split("=");

            if (parts.length == 2) {
                String expression = parts[0].trim();
                int result = calculateResult(expression);
                correctAnswers.append(expression).append(" = ").append(result).append("\n");
            }
        }

        JOptionPane.showMessageDialog(this, correctAnswers.toString(), "正确答案", JOptionPane.INFORMATION_MESSAGE);
    }

    private int calculateResult(String expression) {
        try {
            // 使用 ScriptEngineManager 计算表达式
            ScriptEngineManager manager = new ScriptEngineManager();
            ScriptEngine engine = manager.getEngineByName("js");
            return (int) engine.eval(expression);
        } catch (ScriptException e) {
            e.printStackTrace();
        }

        return 0;
    }


    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new MathExerciseGenerator().setVisible(true);
            }
        });
    }
}