C知道对一个班某门课程成绩进行处理，用顺序表实现对一个班的一门课程成绩信息的显示、查询、插入、删除功能，并对已排好序（非递减有序）的两个班成绩合并，具体如下： 1. 定义成绩顺序表结构。 2. 实现循环菜单显示选择，并完成以下菜单功能：

要实现这个功能，我们需要首先定义一个成绩顺序表结构，然后设计数据结构以及相应的接口来支持显示、查询、插入和删除操作。接下来，我们将创建一个循环菜单来让用户选择操作。

**1. 定义成绩顺序表结构：**

public class StudentScore {
    private int id; // 学生ID
    private String name; // 学生姓名
    private double score; // 成绩

    // 构造函数
    public StudentScore(int id, String name, double score) {
        this.id = id;
        this.name = name;
        this.score = score;
    }

    // 获取和设置方法
    // ...

    @Override
    public String toString() {
        return "StudentScore{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", score=" + score +
                '}';
    }
}

class GradeList extends ArrayList<StudentScore> {
    // 添加排序方法，如Comparator.sort()或Collections.sort()
}

**2. 循环菜单和菜单功能实现：**

import java.util.Scanner;

public class CourseGradeManager {
    private GradeList studentsByClass1;
    private GradeList studentsByClass2;

    public void startMenu() {
        Scanner scanner = new Scanner(System.in);
        boolean continueRunning = true;

        while (continueRunning) {
            System.out.println("\nWelcome to the Course Grade Manager");
            System.out.println("1. Display all scores in Class 1");
            System.out.println("2. Display all scores in Class 2");
            System.out.println("3. Insert a new score in Class 1");
            System.out.println("4. Insert a new score in Class 2");
            System.out.println("5. Delete a score from Class 1");
            System.out.println("6. Delete a score from Class 2");
            System.out.println("7. Merge sorted scores of both classes");
            System.out.println("8. Exit");

            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    displayScores(studentsByClass1);
                    break;
                case 2:
                    displayScores(studentsByClass2);
                    break;
                case 3:
                    insertScore(scanner, studentsByClass1);
                    break;
                case 4:
                    insertScore(scanner, studentsByClass2);
                    break;
                case 5:
                    deleteScore(scanner, studentsByClass1);
                    break;
                case 6:
                    deleteScore(scanner, studentsByClass2);
                    break;
                case 7:
                    mergeSortedLists();
                    break;
                case 8:
                    continueRunning = false;
                    break;
                default:
                    System.out.println("Invalid option. Please try again.");
                    break;
            }
        }
        scanner.close();
    }

    private void displayScores(GradeList list) {
        // 展示列表中的所有学生分数
        for (StudentScore student : list) {
            System.out.println(student);
        }
    }

    private void insertScore(Scanner scanner, GradeList list) {
        // 提取用户输入并添加新分数
        // ...
    }

    private void deleteScore(Scanner scanner, GradeList list) {
        // 删除指定位置的学生分数
        // ...
    }

    private void mergeSortedLists() {
        // 合并两个已排序的列表
        // 可能需要遍历每个列表，比较并添加到新的合并列表
        // ...
    }

    // 其他辅助方法...
}