public void javaCourseSlect(){

System.out.println("欢迎学生:"+this.id+":"+this.name+" 选课!");

Scanner input=new Scanner(System.in);

javaSet st=new javaSet();

for(int i=0;i<3;i++){

System.out.println("请输入课程ID：");

String ID=input.next();

for(javaCourse cr:st.coursesToSelect){

if(cr.id.equals(ID)){

this.courses.add(cr);

System.out.println("选择了课程："+cr.id+":"+cr.name);

}else{

System.out.println("没找到所需课程！！！");}

}

System.out.println("丢东西了！！！");

}

}