public void javaCourseSlect(){

System.out.println("歡迎學生:"+this.id+":"+this.name+" 選課!");

Scanner input=new Scanner(System.in);

javaSet st=new javaSet();

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

System.out.println("請輸入課程ID：");

String ID=input.next();

for(javaCourse cr:st.coursesToSelect){

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

this.courses.add(cr);

System.out.println("選擇了課程："+cr.id+":"+cr.name);

}else{

System.out.println("沒找到所需課程！??！");}

}

System.out.println("丟東西了?。。?);

}

}