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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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
原文链接：https://blog.csdn.net/Floris_lovelace/article/details/80860470