运用java语言，给出程序代码，实现设计一款四则运算的自测软件 要求：1.训练题型包括填写结果、对错判断、选择题等。 2.每次训练时，用户先进行选择，包括难度（如 10 以内、100 以内、1000 以内，带负数、带小数、运算数个数、是否允许带括号等）、题型（填写结果、 对错判断、选择题）、题量（各类题目的个数）等，根据用户的选择，自动生成 试题（10 道题目为一组）。 3.用户在软件系统中答题，并提交。 4系统根据用户提交结果进行评判、给分，并进行分析。

以下是一个简单的实现四则运算自测软件的Java代码示例：

import java.util.Scanner;
import java.util.Random;

public class ArithmeticTest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请选择难度（1-5）：");
        int level = scanner.nextInt();
        System.out.print("请选择题型（1-填写结果 2-对错判断 3-选择题）：");
        int type = scanner.nextInt();
        System.out.print("请选择题量：");
        int count = scanner.nextInt();
        int correctCount = 0;
        int totalCount = 0;
        Random random = new Random();
        for (int i = 0; i < count; i++) {
            int num1 = random.nextInt((int) Math.pow(10, level));
            int num2 = random.nextInt((int) Math.pow(10, level));
            String operator = generateOperator();
            String question = generateQuestion(num1, num2, operator);
            String answer = "";
            switch (type) {
                case 1:
                    System.out.print(question + " = ");
                    answer = scanner.next();
                    if (checkAnswer(num1, num2, operator, answer)) {
                        System.out.println("回答正确！");
                        correctCount++;
                    } else {
                        System.out.println("回答错误！");
                    }
                    break;
                case 2:
                    System.out.print(question + " 答案是否正确（是/否）？");
                    answer = scanner.next();
                    if (checkAnswer(num1, num2, operator, answer)) {
                        System.out.println("回答正确！");
                        correctCount++;
                    } else {
                        System.out.println("回答错误！");
                    }
                    break;
                case 3:
                    String[] options = generateOptions(num1, num2, operator);
                    System.out.println(question);
                    for (int j = 0; j < 4; j++) {
                        System.out.println((char) ('A' + j) + ". " + options[j]);
                    }
                    System.out.print("请选择答案（A/B/C/D）：");
                    answer = scanner.next();
                    if (checkAnswer(options[answer.charAt(0) - 'A'], num1, num2, operator)) {
                        System.out.println("回答正确！");
                        correctCount++;
                    } else {
                        System.out.println("回答错误！");
                    }
                    break;
            }
            totalCount++;
        }
        System.out.println("您本次测试得分为：" + (int) ((double) correctCount / totalCount * 100) + "分");
    }

    public static String generateOperator() {
        Random random = new Random();
        int operatorIndex = random.nextInt(4);
        if (operatorIndex == 0) {
            return "+";
        } else if (operatorIndex == 1) {
            return "-";
        } else if (operatorIndex == 2) {
            return "*";
        } else {
            return "/";
        }
    }

    public static String generateQuestion(int num1, int num2, String operator) {
        return num1 + " " + operator + " " + num2;
    }

    public static boolean checkAnswer(int num1, int num2, String operator, String answer) {
        int result = 0;
        switch (operator) {
            case "+":
                result = num1 + num2;
                break;
            case "-":
                result = num1 - num2;
                break;
            case "*":
                result = num1 * num2;
                break;
            case "/":
                result = num1 / num2;
                break;
        }
        return answer.equals(String.valueOf(result));
    }

    public static String[] generateOptions(int num1, int num2, String operator) {
        String[] options = new String[4];
        int result = 0;
        switch (operator) {
            case "+":
                result = num1 + num2;
                break;
            case "-":
                result = num1 - num2;
                break;
            case "*":
                result = num1 * num2;
                break;
            case "/":
                result = num1 / num2;
                break;
        }
        options[0] = String.valueOf(result);
        Random random = new Random();
        for (int i = 1; i < 4; i++) {
            int errorResult = result + random.nextInt(10) - 5;
            while (errorResult == result) {
                errorResult = result + random.nextInt(10) - 5;
            }
            options[i] = String.valueOf(errorResult);
        }
        return options;
    }

    public static boolean checkAnswer(String option, int num1, int num2, String operator) {
        int result = 0;
        switch (operator) {
            case "+":
                result = num1 + num2;
                break;
            case "-":
                result = num1 - num2;
                break;
            case "*":
                result = num1 * num2;
                break;
            case "/":
                result = num1 / num2;
                break;
        }
        return option.equals(String.valueOf(result));
    }
}

该程序通过 `Scanner` 类获取用户输入的难度、题型和题量，然后根据用户的选择生成相应的题目，并提示用户输入答案或选择答案。程序还会根据用户的回答进行评判，并输出得分。在生成题目和选项时，程序使用了 `Random` 类来生成随机数。