实现了课上部分要求
QixunluGUI类
点击查看代码
package qixun;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.Timer;
public class QixunluGUI extends JFrame {
private static final int TIME_LIMIT = 60;
private int questionCount;
private String[] questions;
private double[] correctAnswers;
private JTextField[] answerFields;
private JLabel[] resultLabels;
private JLabel timerLabel = new JLabel("剩余时间: " + TIME_LIMIT + "秒");
private int correctCount = 0;
private int timeRemaining = TIME_LIMIT;
public QixunluGUI(int questionCount, int gradeLevel) {
this.questionCount = questionCount;
this.questions = new String[questionCount];
this.correctAnswers = new double[questionCount];
this.answerFields = new JTextField[questionCount];
this.resultLabels = new JLabel[questionCount];
setTitle("数学测验");
setSize(500, 700);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
// 生成问题
QuestionGenerator generator = new QuestionGenerator(gradeLevel);
for (int i = 0; i < questionCount; i++) {
questions[i] = generator.getQuestion();
correctAnswers[i] = generator.getAnswer(questions[i]);
}
// 创建一个面板用于问题布局，三道题一行
JPanel questionPanel = new JPanel(new GridLayout((questionCount + 2) / 3, 4));
for (int i = 0; i < questionCount; i++) {
questionPanel.add(new JLabel("问题 " + (i + 1) + ": " + questions[i]));
answerFields[i] = new JTextField(10);
questionPanel.add(answerFields[i]);
resultLabels[i] = new JLabel();
questionPanel.add(resultLabels[i]);
JButton checkButton = new JButton("提交");
int finalI = i;
checkButton.addActionListener(e -> submitSingleAnswer(finalI, resultLabels[finalI]));
questionPanel.add(checkButton);
}
// 创建一个面板用于放置总提交按钮
JPanel submitPanel = new JPanel(new FlowLayout());
JButton finalSubmitButton = new JButton("提交所有答案");
JLabel finalResultLabel = new JLabel();
// 处理倒计时
Timer timer = new Timer(1000, e -> {
timeRemaining--;
timerLabel.setText("剩余时间: " + timeRemaining + "秒");
if (timeRemaining <= 0) {
((Timer) e.getSource()).stop();
JOptionPane.showMessageDialog(null, "时间到！");
submitAllAnswers(finalResultLabel);
}
});
timer.start();
// 设置总提交按钮事件
finalSubmitButton.addActionListener(e -> {
timer.stop();
submitAllAnswers(finalResultLabel);
});
// 将提交按钮和结果标签加入提交面板
submitPanel.add(finalSubmitButton);
submitPanel.add(finalResultLabel);
add(timerLabel, BorderLayout.NORTH);
add(new JScrollPane(questionPanel), BorderLayout.CENTER); // 添加问题面板
add(submitPanel, BorderLayout.SOUTH); // 提交按钮单独一行
setVisible(true);
}
private void submitSingleAnswer(int index, JLabel resultLabel) {
try {
double userAnswer = Double.parseDouble(answerFields[index].getText());
if (Math.abs(userAnswer - correctAnswers[index]) < 0.001) {
correctCount++;
resultLabel.setText("正确");
} else {
resultLabel.setText("错误，正确答案是: " + correctAnswers[index]);
}
} catch (NumberFormatException ex) {
resultLabel.setText("请输入有效的数字");
}
}
private void submitAllAnswers(JLabel finalResultLabel) {
finalResultLabel.setText("总正确率: " + (correctCount / (double) questionCount * 100) + "%");
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入题目数量: ");
int questionCount = scanner.nextInt();
System.out.print("请输入年级(2-4): ");
int gradeLevel = scanner.nextInt();
new QixunluGUI(questionCount, gradeLevel);
}
}
点击查看代码
package qixun;
import java.io.*;
import java.util.*;
import javax.swing.JOptionPane;
public class WrongQuestionManager {
private Map<String, Integer> wrongQuestions = new HashMap<>();
public void saveWrongQuestion(String question, String correctAnswer) {
wrongQuestions.put(question, wrongQuestions.getOrDefault(question, 0) + 1);
// 将错题保存到文件
}
public void retryWrongQuestions() {
// 进行错题重练逻辑
}
}
import java.util.;
import javax.script.;
public class QuestionGenerator {
private int gradeLevel;
private int operandCount;
private boolean includeMulDiv;
private boolean includeBrackets;
private int range;
private Random random;
public QuestionGenerator(int gradeLevel) {
this.gradeLevel = gradeLevel;
this.random = new Random();
}
// 生成并返回一个数学题目（字符串）
public String getQuestion() {
int num1 = random.nextInt(100); // 随机生成一个100以内的数字
int num2 = random.nextInt(1, 101); // 随机生成另一个100以内的数字，确保不为0（用于除法）
char operator = randomOperator();
// 返回一个题目字符串
return num1 + " " + operator + " " + num2;
}
// 根据生成的题目，计算并返回正确答案
public double getAnswer(String question) {
// 从问题字符串中解析操作数和运算符
String[] parts = question.split(" ");
int num1 = Integer.parseInt(parts[0]);
char operator = parts[1].charAt(0);
int num2 = Integer.parseInt(parts[2]);
switch (operator) {
case '+':
return num1 + num2;
case '-':
return num1 - num2;
case '*':
return num1 * num2;
case '/':
// 避免除以0
return num2 != 0 ? num1 / (double) num2 : 0;
default:
throw new IllegalArgumentException("不支持的运算符: " + operator);
}
}
// 随机生成一个运算符
private char randomOperator() {
char[] operators = {'+', '-', '*', '/'};
return operators[random.nextInt(operators.length)];
}
public QuestionGenerator(int gradeLevel, int operandCount, boolean includeMulDiv, boolean includeBrackets, int range) {
this.gradeLevel = gradeLevel;
this.operandCount = operandCount;
this.includeMulDiv = includeMulDiv;
this.includeBrackets = includeBrackets;
this.range = range;
}
public String generateQuestion() {
Random rand = new Random();
List<Integer> operands = new ArrayList<>();
List<String> operators = new ArrayList<>();
for (int i = 0; i < operandCount; i++) {
operands.add(rand.nextInt(range));
if (i < operandCount - 1) {
if (includeMulDiv) {
operators.add(new String[]{"+", "-", "*", "/"}[rand.nextInt(4)]);
} else {
operators.add(new String[]{"+", "-"}[rand.nextInt(2)]);
}
}
}
if (includeBrackets) {
// 随机插入括号逻辑
}
return buildExpression(operands, operators);
}
private String buildExpression(List<Integer> operands, List<String> operators) {
// 构建表达式字符串
StringBuilder expression = new StringBuilder();
for (int i = 0; i < operands.size(); i++) {
expression.append(operands.get(i));
if (i < operators.size()) {
expression.append(" ").append(operators.get(i)).append(" ");
}
}
return expression.toString();
}
}
标签：String,int,private,add,new,questionCount,10.14 From： https://www.cnblogs.com/qiixunlu/p/18466491