JAVA求问求问求问

Question

4、 （学生选课）根据下面的类图，编写课程Course类和学生Student类。
Course类说明如下：
（1）addStudent方法用于添加一个选课的学生；
（2）toString方法用于返回课程的所有信息，包括课程名称和选课学生。
Student类说明如下：
（1）toString方法用于返回学生的信息。
注意：图中省略了两个类所有数据域的修改器和读取器。

编写测试类，创建一门课程对象和两个学生对象，为该课程添加两个选课学生。
样例如下：

Answer 1

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
@Test
  public void test() {
    class Student {
      private int stuNo;
      private String name;

      Student() {
      }

      Student(int stuNo, String name) {
        this.stuNo = stuNo;
        this.name = name;
      }

      @Override
      public String toString() {
        return "Student{" + "stuNo=" + stuNo + ", name='" + name + '\'' + '}';
      }
    }
    class Course {
      private String name;
      private List<Student> stuList;
      private int numberOfStudents;

      Course() {
      }

      Course(String name) {
        this.name = name;
      }

      Course(String name, List<Student> stuList, int numberOfStudents) {
        this.name = name;
        this.stuList = stuList;
        this.numberOfStudents = numberOfStudents;
      }

      public Course addStudent(Student stu) {
        if (CollectionUtil.isEmpty(stuList)) {
          stuList = new ArrayList<>();
        }
        stuList.add(stu);
        return this;
      }

      @Override
      public String toString() {
        return "Course{" + "name='" + name + '\'' + ", stuList=" + stuList + ", numberOfStudents=" + numberOfStudents
          + '}';
      }
    }
    Scanner scanner = new Scanner(System.in);
    System.out.println("请输入选课课程名称");
    String courseName = scanner.nextLine();
    Course course = new Course(courseName);

    scanner = new Scanner(System.in);
    System.out.println("请输入学生学号");
    int student1No = scanner.nextInt();
    scanner = new Scanner(System.in);
    System.out.println("请输入学生姓名");
    String student1Name = scanner.nextLine();
    Student student1 = new Student(student1No, student1Name);

    scanner = new Scanner(System.in);
    System.out.println("请输入学生学号");
    int student2No = scanner.nextInt();
    scanner = new Scanner(System.in);
    System.out.println("请输入学生姓名");
    String student2Name = scanner.nextLine();
    Student student2 = new Student(student2No, student2Name);

    course.addStudent(student1);
    course.addStudent(student2);

    System.out.println("课程名称 "+course.name);
    System.out.println("选课学生名单");
    for(Student student : course.stuList){
      System.out.print("学号 "+student.stuNo);
      System.out.println(" 姓名"+student.name);
    }
  }