用java语言编写一个程序，输入某个班某门课程成绩，统计及格人数、不及格人数及课程平均分。设计一个异常类，当输入的成绩小于0或者大于100时抛出异常，程序将捕获这个异常，并作出相应处理。

package Demo05;

import java.util.Scanner;

public class Test {
    static int passCount = 0;
    static int failCount = 0;
    static int sum = 0;
    static int scores= 0;
    public void test(int a) throws RuntimeException{
        scores = a;
        if (a >= 60 && a <= 100){
            passCount++;
            sum += scores;
            System.out.println("及格学生人数为:"+passCount);
            System.out.println("不及格学生人数为:"+failCount);
            System.out.println("课程平均分为:"+sum/(passCount+failCount));
        }
        else if (a >= 0 && a < 60){
            failCount++;
            sum+=scores;
            System.out.println("及格学生人数为:"+passCount);
            System.out.println("不及格学生人数为:"+failCount);
            System.out.println("课程平均分为:"+sum/(passCount+failCount));
        }
        else {
                throw new RuntimeException();
            }
    }



    public static void main(String[] args) {
             Scanner scanner = new Scanner(System.in);
             System.out.print("请输入学生成绩：");
        while (scanner.hasNextInt()) {
            int a = scanner.nextInt();
            try {
                new Test().test(a);
            } catch (RuntimeException e) {
                System.out.println("您输入的成绩有误，请重新输入");
            }
        }

    }
}