public boolean addCourse(String id,String name){
boolean iss = true;
for(Course cour:course){
if(cour.getId().equals(id)){
System.out.println("请输入"+(course.size()+1)+"后的id!!");
iss = false;
return true;
}
}
if(!(iss)){
Course cou = new Course(id,name);
course.add(cou);
return false;
}
}
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