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java实现学生选课系统

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这篇CFSDN的博客文章java实现学生选课系统由作者收集整理,如果你对这篇文章有兴趣,记得点赞哟.

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:

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//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;
  }
 
 
}
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/**
   * 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<students.length;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<students.length;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
 
  }
 
 
}
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/**
  * 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< this .courses.length;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< this .courses.length;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;
  }
 
 
}
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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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原文链接:https://blog.csdn.net/Floris_lovelace/article/details/80860470 。

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