pioneer
10-02-2004, 15:26
Object co hai thanh phan chinh la thuoc tinh va hanh vi
Trang thai(Status) cua mot object la duoc dinh nghia boi thuoc tinh va cac quan he(relationships) voi cac object khac
cac Ha`m(operation) la cac hanh vi cua object.
Moi object co mot dinh danh duy nhat (unique identity) tham chi neu trang thai la giong nhau
Trong UML object duoc the hien la mot hinh chu nhat chua ten cua object va ten class duoc cach nhau boi dau 2 cham
4 nguyen tac co ban cua huong doi tuong la abstraction (truu tuong hoa), encapsulation (tinh dong goi), modularity , and hierarchy.
Abstraction la tap trung nhung phan quan trong va thiet yieu trong kh i bo qua nhung chi tiet it quan trong.
Encapsulation la the hien thuoc tinh va hanh vi cua object trong khi an di phan thuc hien(implementation ) cua object.
Modularity chia tap lon thanh nhung tap nho hon de de quan ly.
Hierarchy to chuc cac thanh phan thanh nhom or loai de phan biet su giong nhau va khac nhau giua cac thanh phan.
Hi vong la moi nguoi ho tro de hieu sau hon ve Object Oriented
Trang thai(Status) cua mot object la duoc dinh nghia boi thuoc tinh va cac quan he(relationships) voi cac object khac
cac Ha`m(operation) la cac hanh vi cua object.
Moi object co mot dinh danh duy nhat (unique identity) tham chi neu trang thai la giong nhau
Trong UML object duoc the hien la mot hinh chu nhat chua ten cua object va ten class duoc cach nhau boi dau 2 cham
4 nguyen tac co ban cua huong doi tuong la abstraction (truu tuong hoa), encapsulation (tinh dong goi), modularity , and hierarchy.
Abstraction la tap trung nhung phan quan trong va thiet yieu trong kh i bo qua nhung chi tiet it quan trong.
Encapsulation la the hien thuoc tinh va hanh vi cua object trong khi an di phan thuc hien(implementation ) cua object.
Modularity chia tap lon thanh nhung tap nho hon de de quan ly.
Hierarchy to chuc cac thanh phan thanh nhom or loai de phan biet su giong nhau va khac nhau giua cac thanh phan.
Hi vong la moi nguoi ho tro de hieu sau hon ve Object Oriented