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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