//teacher

public class Teacher {
 private int id;
 private String teacherName;
 private Course[] courses;
 //构造函数
 public Teacher() {
  super();
  courses= new Course[3];
 }
 public Teacher(int id,String teacherName){
  this.id=id;
  this.teacherName=teacherName;
  courses = new Course[3];
 }
 //修改或是添加属性
 public int getId() {
  return id;
 }
 public void setId(int id) {
  this.id = id;
 }
 public String getTeacherName() {
  return teacherName;
 }
 public void setTeacherName(String teacherName) {
  this.teacherName = teacherName;
 }


}

/**
  * 课程
*/

public class Course {
 private String courseName;
 private int courseId;
 private Teacher teacher;
 private float credit;
 private Student[] students;
 //构造函数
 public Course(int courseId,String courseName,float credit,Teacher teacher) {
  super();
  this.courseId=courseId;
  this.courseName=courseName;
  this.credit=credit;
  this.setTeacher(teacher);
  students = new Student[30];
 }
 public Course(int courseId,String courseName,float credit) {
  super();
  this.courseId=courseId;
  this.courseName=courseName;
  this.credit=credit;
  students = new Student[30];
 }

 public Course(int courseId,String courseName) {
  super();
  this.courseId=courseId;
  this.courseName=courseName;
  students = new Student[30];
 }

 public Course() {//默认形式，要有以防万一
  super();
  students = new Student[30];
 }

 //修改或获取属性值id，name，credit，
 public void setId(int id){
  this.courseId=id;
 }
 public int getId(){
  return this.courseId;
 }
 public void setName(String name){
  this.courseName=name;
 }
 public String getName(){
  return this.courseName;
 }
 public void setCredit(float credit ){
  this.credit=credit;
 }
 public float getCredit(){
  return this.credit;
 }
 public Teacher getTeacher() {
  return teacher;
 }
 public void setTeacher(Teacher teacher) {
  this.teacher = teacher;
 }

 //课加入学生
 public boolean addStudent(Student stu){
  boolean flag = false;//标志值：是否加入成功
  //如果学生没有选过这门课，同时课的学生还没满则执行
  if(!isSelectedStudent(stu)&&isNullStudent(stu)){
   for(int i=0;i

/**
 * 学生代码
 * @author Floris0811
 */
public class Student {
 private String stuName;
 private int stuId;
 private String major;
 private Course[] courses;
 //构造函数
 public Student() {//不要忘
  super();
  courses = new Course[3];
 }
 public Student(int stuId,String stuName) {
  super();
  this.stuId=stuId;
  this.stuName=stuName;
  courses = new Course[3];
 }
 public Student(int stuId,String stuName,String major) {
  super();
  this.stuId=stuId;
  this.stuName=stuName;
  this.major = major;
  courses = new Course[3];
 }
 //修改获取属性name,id,major
 public String getStuName() {
  return stuName;
 }

 public void setStuName(String stuName) {
  this.stuName = stuName;
 }
 public int getStuId() {
  return stuId;
 }
 public void setStuId(int stuId) {
  this.stuId = stuId;
 }
 public String getMajor() {
  return major;
 }
 public void setMajor(String major) {
  this.major = major;
 }
 //学生选课；
 public boolean addCourse(Course course){
  boolean flag=false;
  if(!isSelectedCourse(course)&&isNullCourse(course)){
   for(int i=0;i

package test;

public class ChooseCourseByStu {

 /**
  * 选课管理系统
  */
 public static void main(String[] args) {
  Student stu0 = new Student(1001,"Lily");
  Student stu1 = new Student(1002,"Eilly");
  Student stu2 = new Student(1003,"Floris");
  Student stu3 = new Student(1004,"HaHa");
  Course cour0 = new Course(001,"高数");
  Course cour1 = new Course(002,"线代");
  Course cour2 = new Course(003,"概率论");
  stu0.addCourse(cour0);
  stu0.addCourse(cour2);
  stu0.addCourse(cour1);
  stu1.addCourse(cour2);
  stu1.addCourse(cour0);
  stu2.addCourse(cour1);
  stu3.addCourse(cour0);
  stu3.addCourse(cour1);
  stu1.removeCourse(cour2);
  stu0.displayCourse();
  cour0.removeStudent(stu1);
  cour1.displayStudent();
 }

}