第1个回答 2014-10-22
意思是看着这个图 写出抽象类?
public abstract class AbstractStudentManager {
String viewExamTime(){
return "";
}
String viewCoutseTimeTable(){
return "";
}
String viewScore(){
return "";
}
String viewHomeWork(String course){
return "";
}
void downHomeWork(){
}
void UpdateStudentInfo(){
}
void printStudentInfo(){
}
abstract void printMsg();
abstract Student getStudentById(int uid);
}