java 编写一个四则运算测试程序，随机产生10道四则运算题目，并将题目在屏幕上显示，等待用户回答，统计得分，并输出最后得分，例如：“您做了10道题，其中正确X道，错误X道，最后得分：XX”。

好的，我可以回答这个问题。以下是一个Java编写的四则运算测试程序的示例代码：

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

public class ArithmeticTest {
    public static void main(String[] args) {
        int numQuestions = 10;
        int numCorrect = 0;
        int numWrong = 0;
        Random random = new Random();
        Scanner scanner = new Scanner(System.in);
        for (int i = 1; i <= numQuestions; i++) {
            int a = random.nextInt(100);
            int b = random.nextInt(100);
            int op = random.nextInt(4);
            int result;
            String operator;
            switch (op) {
                case 0:
                    result = a + b;
                    operator = "+";
                    break;
                case 1:
                    result = a - b;
                    operator = "-";
                    break;
                case 2:
                    result = a * b;
                    operator = "*";
                    break;
                case 3:
                    result = a / b;
                    operator = "/";
                    break;
                default:
                    throw new IllegalStateException("Unexpected value: " + op);
            }
            System.out.print(i + ". " + a + " " + operator + " " + b + " = ");
            int answer = scanner.nextInt();
            if (answer == result) {
                System.out.println("Correct!");
                numCorrect++;
            } else {
                System.out.println("Wrong! The answer is " + result);
                numWrong++;
            }
        }
        System.out.println("You answered " + numCorrect + " questions correctly and " + numWrong + " questions incorrectly.");
        System.out.println("Your final score is " + (numCorrect * 10) + ".");
    }
}

这个程序会随机生成10道四则运算题目，并等待用户输入答案。用户回答后，程序会判断答案是否正确，并统计得分。最后，程序会输出用户的得分。