本文为大家分享了java实现学生选课系统的具体代码，供大家参考，具体内容如下

案例要求：

学生(学号，姓名，专业，所选课程{<3})

老师(工号，姓名，所教课程{<3})

课程(课程号，课程名，学分，教师，已选课学生{<30})

选课系统代码如下：

//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

if(students[i]==null){

students[i]=stu;

flag=true;

break;

}

}

}

return flag;

}

//课移除学生

public boolean removestudent(student stu){

boolean flag=false;

if(isselectedstudent(stu)){//选过这门课

for(int i=0;i

if(students[i]==stu){

students[i]=null;

flag=true;

break;

}

}

}

return flag;

}

//显示选择课程的学生：

public void displaystudent(){

system.out.println("选择的课程："+this.coursename+"的学生有:");

for(student s:students){

if(s!=null){

system.out.print(s.getstuname()+" ");

}

}

system.out.println();

}

//子方法1：学生是否选过这门课

public boolean isselectedstudent(student stu){

boolean flag=false;

for(student s:students){//只能用于检查，不能修改

if(s==stu){

flag=true;

break;

}

}

return flag;

}

//子方法2：学科学生未达到限定人数吗

public boolean isnullstudent(student stu){

boolean flag=false;

for(student s:students){

if(s==null){//还有空位

flag=true;

break;

}

}

return flag;

}

public static void main(string[] args) {

// todo auto-generated method stub

}

}

/**

* 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

if(courses[i]==null){

courses[i]=course;

course.addstudent(this);//课程也要添加学生

flag=true;

break;

}

}

}

return flag;

}

//学生移除课程

public boolean removecourse(course course){

boolean flag=false;

if(isselectedcourse(course)){

for(int i=0;i

if(courses[i]==course){

courses[i]=null;

course.removestudent(this);//在课程中移除学生

flag=true;

break;

}

}

}

return flag;

}

//显示学生所选的课程

public void displaycourse(){

system.out.println("学生"+this.stuname+"所选课程有：");

for(course c:courses){

if(c!=null){

system.out.print(c.getname()+" ");

}

}

system.out.println();

}

//子方法1：课是否被选过

public boolean isselectedcourse(course course){

boolean flag=false;

for(course c:courses){

if(c==course){

flag=true;

break;

}

}

return flag;

}

//子方法2：学生是否还有选修课位置

public boolean isnullcourse(course course){

boolean flag=false;

for(course c:courses){

if(c==null){

flag=true;

break;

}

}

return flag;

}

}

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();

}

}

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