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。

源代码：.

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");

            }

        }

    }

}

实验运行截图：