求Java学生选修课程系统设计

Question

假定有n门课程，每门课程有：课程编号，课程名称，课程性质(公共课、必修课、选修课)，总学时，授课学时，实验或上机学时，学分，开课学期等信息，学生可按要求（如总学分不得少于60）自由选课。试设计选修课程系统，使之能提供以下功能：
1、系统以菜单方式工作
2、课程信息录入功能－－输入
3、课程信息浏览功能－－输出
4、课程信息查询功能－－算法
查询方式
按学分查询
按课程性质查询
5、学生选修课程(可选项)

Answer 1

不知道是否符合，如果不符合，把需要的要求在此基础上说下

import java.util.ArrayList;
import java.util.Scanner;

class Course {
    String id;
    String name;
    String nature;
    int totalHours;
    int lectureHours;
    int labHours;
    int credit;
    int semester;

    public Course(String id, String name, String nature, int totalHours, int lectureHours, int labHours, int credit, int semester) {
        this.id = id;
        this.name = name;
        this.nature = nature;
        this.totalHours = totalHours;
        this.lectureHours = lectureHours;
        this.labHours = labHours;
        this.credit = credit;
        this.semester = semester;
    }
}

public class CourseSelectionSystem {
    static ArrayList<Course> courses = new ArrayList<>();
    static ArrayList<Course> selectedCourses = new ArrayList<>();
    static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        while (true) {
            System.out.println("选修课程系统");
            System.out.println("1. 课程信息录入");
            System.out.println("2. 课程信息浏览");
            System.out.println("3. 课程信息查询");
            System.out.println("4. 学生选修课程");
            System.out.println("5. 退出系统");
            System.out.print("请选择: ");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    addCourse();
                    break;
                case 2:
                    viewCourses();
                    break;
                case 3:
                    searchCourses();
                    break;
                case 4:
                    selectCourse();
                    break;
                case 5:
                    System.exit(0);
                default:
                    System.out.println("无效选择");
            }
        }
    }

    public static void addCourse() {
        System.out.print("课程编号: ");
        String id = scanner.next();
        System.out.print("课程名称: ");
        String name = scanner.next();
        System.out.print("课程性质 (公共课/必修课/选修课): ");
        String nature = scanner.next();
        System.out.print("总学时: ");
        int totalHours = scanner.nextInt();
        System.out.print("授课学时: ");
        int lectureHours = scanner.nextInt();
        System.out.print("实验或上机学时: ");
        int labHours = scanner.nextInt();
        System.out.print("学分: ");
        int credit = scanner.nextInt();
        System.out.print("开课学期: ");
        int semester = scanner.nextInt();

        Course course = new Course(id, name, nature, totalHours, lectureHours, labHours, credit, semester);
        courses.add(course);
    }

    public static void viewCourses() {
        for (Course course : courses) {
            System.out.println(course.id + " " + course.name + " " + course.nature + " " + course.totalHours + " " + course.lectureHours + " " + course.labHours + " " + course.credit + " " + course.semester);
        }
    }

    public static void searchCourses() {
        System.out.println("1. 按学分查询");
        System.out.println("2. 按课程性质查询");
        System.out.print("请选择查询方式: ");
        int choice = scanner.nextInt();
        if (choice == 1) {
            System.out.print("输入学分: ");
            int credit = scanner.nextInt();
            for (Course course : courses) {
                if (course.credit == credit) {
                    System.out.println(course.id + " " + course.name + " " + course.nature + " " + course.totalHours + " " + course.lectureHours + " " + course.labHours + " " + course.credit + " " + course.semester);
                }
            }
        } else if (choice == 2) {
            System.out.print("输入课程性质 (公共课/必修课/选修课): ");
            String nature = scanner.next();
            for (Course course : courses) {
                if (course.nature.equals(nature)) {
                    System.out.println(course.id + " " + course.name + " " + course.nature + " " + course.totalHours + " " + course.lectureHours + " " + course.labHours + " " + course.credit +course.semester);
                }
            }
        } else {
            System.out.println("无效选择");
        }
    }

    public static void selectCourse() {
        int totalCredit = 0;
        for (Course course : selectedCourses) {
            totalCredit += course.credit;
        }
        if (totalCredit >= 60) {
            System.out.println("已选学分不得少于60");
            return;
        }
        System.out.print("输入课程编号: ");
        String id = scanner.next();
        for (Course course : courses) {
            if (course.id.equals(id)) {
                selectedCourses.add(course);
                System.out.println("选课成功");
                return;
            }
        }
        System.out.println("未找到课程");
    }
}