{"id":28015,"date":"2025-05-13T09:40:27","date_gmt":"2025-05-13T02:40:27","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=28015"},"modified":"2025-06-14T16:10:18","modified_gmt":"2025-06-14T09:10:18","slug":"interface-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/interface-la-gi\/","title":{"rendered":"Interface l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch &#8211; V\u00ed d\u1ee5 c\u1ee5 th\u1ec3 trong l\u1eadp tr\u00ecnh"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Interface-la-gi\" >Interface l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Cac-dac-diem-chinh-cua-Interface-trong-lap-trinh\" >C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Interface trong l\u1eadp tr\u00ecnh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Chi-chua-khai-bao-phuong-thuc\" >Ch\u1ec9 ch\u1ee9a khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Khong-the-tao-doi-tuong-truc-tiep\" >Kh\u00f4ng th\u1ec3 t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng tr\u1ef1c ti\u1ebfp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Khong-co-thuoc-tinh-trang-thai\" >Kh\u00f4ng c\u00f3 thu\u1ed9c t\u00ednh tr\u1ea1ng th\u00e1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Cac-thanh-vien-mac-dinh-la-Public-va-Abstract\" >C\u00e1c th\u00e0nh vi\u00ean m\u1eb7c \u0111\u1ecbnh l\u00e0 Public v\u00e0 Abstract<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Yeu-cau-lop-trien-khai-phai-cai-dat\" >Y\u00eau c\u1ea7u l\u1edbp tri\u1ec3n khai ph\u1ea3i c\u00e0i \u0111\u1eb7t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Interface-co-the-Ke-thua-Interface-khac\" >Interface c\u00f3 th\u1ec3 K\u1ebf th\u1eeba Interface kh\u00e1c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Vi-du-cac-cu-phap-co-ban-cua-Interface\" >V\u00ed d\u1ee5 c\u00e1c c\u00fa ph\u00e1p c\u01a1 b\u1ea3n c\u1ee7a Interface<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Cu-phap-Khai-bao-Interface\" >C\u00fa ph\u00e1p Khai b\u00e1o Interface<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Cu-phap-Trien-khai-Interface\" >C\u00fa ph\u00e1p Tri\u1ec3n khai Interface<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Nhung-loi-ich-cua-Interface-trong-lap-trinh\" >Nh\u1eefng l\u1ee3i \u00edch c\u1ee7a Interface trong l\u1eadp tr\u00ecnh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Ho-tro-da-hinh-manh-me\" >H\u1ed7 tr\u1ee3 \u0111a h\u00ecnh m\u1ea1nh m\u1ebd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Dat-duoc-tinh-truu-tuong\" >\u0110\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh tr\u1eebu t\u01b0\u1ee3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Giup-giam-su-phu-thuoc\" >Gi\u00fap gi\u1ea3m s\u1ef1 ph\u1ee5 thu\u1ed9c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Mo-phong-da-ke-thua\" >M\u00f4 ph\u1ecfng \u0111a k\u1ebf th\u1eeba<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Chuan-hoa-thiet-ke\" >Chu\u1ea9n h\u00f3a thi\u1ebft k\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Ho-tro-kiem-thu\" >H\u1ed7 tr\u1ee3 ki\u1ec3m th\u1eed<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/#Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh\" >\u0110i\u1ec3m gi\u1ed1ng v\u00e0 kh\u00e1c nhau gi\u1eefa Interface v\u00e0 Abstract Class trong l\u1eadp tr\u00ecnh<\/a><\/li><\/ul><\/nav><\/div>\n<p>Interface l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng c\u1ee7a L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) nh\u01b0ng th\u01b0\u1eddng g\u00e2y b\u1ed1i r\u1ed1i cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u. Hi\u1ec3u r\u00f5 <strong>Interface l\u00e0 g\u00ec<\/strong> v\u00e0 vai tr\u00f2 c\u1ee7a n\u00f3 l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 vi\u1ebft code linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n, m\u1edf ra c\u00e1nh c\u1eeda \u0111\u1ec3 l\u00e0m ch\u1ee7 c\u00e1c k\u1ef9 thu\u1eadt thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p>B\u00e0i vi\u1ebft n\u00e0y t\u1eeb InterData s\u1ebd \u0111i gi\u1ea3i th\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh l\u00e0m n\u00ean Interface, \u0111\u01b0a ra v\u00ed d\u1ee5 v\u1ec1 c\u00e1c c\u00fa ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 b\u1ea1n b\u1eaft \u0111\u1ea7u vi\u1ebft code, nh\u1eefng l\u1ee3i \u00edch quan tr\u1ecdng khi \u00e1p d\u1ee5ng gi\u00fap b\u1ea1n n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng v\u1ec1 l\u1eadp tr\u00ecnh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Interface-la-gi\"><\/span>Interface l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/interdata.vn\/blog\/interface-la-gi\/\"><strong>Interface trong l\u1eadp tr\u00ecnh<\/strong><\/a>, \u0111\u1eb7c bi\u1ec7t trong L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP), c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t b\u1ea3n h\u1ee3p \u0111\u1ed3ng (contract) ho\u1eb7c khu\u00f4n m\u1eabu (blueprint) quy \u0111\u1ecbnh nh\u1eefng h\u00e0nh vi (c\u00e1c ph\u01b0\u01a1ng th\u1ee9c) m\u00e0 b\u1ea5t k\u1ef3 l\u1edbp (Class) n\u00e0o mu\u1ed1n &#8220;k\u00fd h\u1ee3p \u0111\u1ed3ng&#8221; v\u1edbi n\u00f3 (tri\u1ec3n khai Interface) \u0111\u1ec1u ph\u1ea3i th\u1ef1c hi\u1ec7n \u0111\u1ea7y \u0111\u1ee7. N\u00f3 ch\u1ec9 \u0111\u1ecbnh ngh\u0129a nh\u1eefng g\u00ec c\u1ea7n l\u00e0m, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0m nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n<figure id=\"attachment_28016\" aria-describedby=\"caption-attachment-28016\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Interface-la-gi-trong-lap-trinh.jpg\" alt=\"Interface l\u00e0 g\u00ec trong l\u1eadp tr\u00ecnh\" width=\"800\" height=\"500\" class=\"size-full wp-image-28016\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Interface-la-gi-trong-lap-trinh.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Interface-la-gi-trong-lap-trinh-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Interface-la-gi-trong-lap-trinh-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Interface-la-gi-trong-lap-trinh-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28016\" class=\"wp-caption-text\">Interface l\u00e0 g\u00ec trong l\u1eadp tr\u00ecnh?<\/figcaption><\/figure>\n<p>M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a Interface l\u00e0 t\u1ea1o ra s\u1ef1 tr\u1eebu t\u01b0\u1ee3ng h\u00f3a (Abstraction) v\u00e0 h\u1ed7 tr\u1ee3 m\u1ea1nh m\u1ebd cho t\u00ednh \u0111a h\u00ecnh (Polymorphism) trong c\u00e1c \u1ee9ng d\u1ee5ng. N\u00f3 gi\u00fap \u0111\u1ecbnh ngh\u0129a m\u1ed9t chu\u1ea9n h\u00e0nh vi chung m\u00e0 nhi\u1ec1u l\u1edbp kh\u00e1c nhau c\u00f3 th\u1ec3 tu\u00e2n theo, d\u00f9 ch\u00fang c\u00f3 c\u1ea5u tr\u00fac n\u1ed9i t\u1ea1i kh\u00e1c bi\u1ec7t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-dac-diem-chinh-cua-Interface-trong-lap-trinh\"><\/span>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Interface trong l\u1eadp tr\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 vai tr\u00f2 v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Interface hi\u1ec7u qu\u1ea3 trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP), vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ed1t l\u00f5i c\u1ee7a n\u00f3 l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Interface mang nh\u1eefng t\u00ednh ch\u1ea5t \u0111\u1ed9c \u0111\u00e1o, kh\u00e1c bi\u1ec7t v\u1edbi Class hay Abstract Class, \u0111\u1ecbnh h\u00ecnh c\u00e1ch ch\u00fang ta thi\u1ebft k\u1ebf v\u00e0 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m linh ho\u1ea1t v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng.<\/p>\n<p>Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao Interface l\u1ea1i \u0111\u01b0\u1ee3c xem nh\u01b0 m\u1ed9t &#8220;b\u1ea3n h\u1ee3p \u0111\u1ed3ng&#8221; v\u1ec1 h\u00e0nh vi. Ch\u00fang quy \u0111\u1ecbnh r\u00f5 r\u00e0ng Interface l\u00e0 g\u00ec, n\u00f3 ch\u1ee9a \u0111\u1ef1ng nh\u1eefng g\u00ec, v\u00e0 c\u00e1ch c\u00e1c l\u1edbp kh\u00e1c ph\u1ea3i t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u00f3. Vi\u1ec7c tu\u00e2n th\u1ee7 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y khi l\u1eadp tr\u00ecnh \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n v\u00e0 \u0111\u00fang \u0111\u1eafn c\u1ee7a m\u00f4 h\u00ecnh thi\u1ebft k\u1ebf.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Chi-chua-khai-bao-phuong-thuc\"><\/span>Ch\u1ec9 ch\u1ee9a khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt nh\u1ea5t c\u1ee7a Interface truy\u1ec1n th\u1ed1ng l\u00e0 n\u00f3 ch\u1ec9 \u0111\u1ecbnh ngh\u0129a <strong>ch\u1eef k\u00fd (signature)<\/strong> c\u1ee7a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u2013 t\u1ee9c l\u00e0 ch\u1ec9 bao g\u1ed3m t\u00ean ph\u01b0\u01a1ng th\u1ee9c, ki\u1ec3u d\u1eef li\u1ec7u tr\u1ea3 v\u1ec1 v\u00e0 danh s\u00e1ch c\u00e1c tham s\u1ed1 (n\u1ebfu c\u00f3). Interface <strong>ho\u00e0n to\u00e0n kh\u00f4ng ch\u1ee9a ph\u1ea7n c\u00e0i \u0111\u1eb7t chi ti\u1ebft (implementation)<\/strong> hay c\u00f2n g\u1ecdi l\u00e0 ph\u1ea7n th\u00e2n (body) c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f3.<\/p>\n<p>M\u1ee5c \u0111\u00edch l\u00e0 Interface ch\u1ec9 quy \u0111\u1ecbnh ph\u1ea3i c\u00f3 ph\u01b0\u01a1ng th\u1ee9c g\u00ec, c\u00f2n vi\u1ec7c ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f3 ho\u1ea1t \u0111\u1ed9ng ra sao l\u00e0 tr\u00e1ch nhi\u1ec7m c\u1ee7a c\u00e1c l\u1edbp tri\u1ec3n khai n\u00f3. C\u00e1c phi\u00ean b\u1ea3n ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 c\u00f3 th\u00eam default methods ho\u1eb7c static methods c\u00f3 c\u00e0i \u0111\u1eb7t ngay trong Interface, nh\u01b0ng \u0111\u00f3 l\u00e0 t\u00ednh n\u0103ng b\u1ed5 sung, kh\u00f4ng ph\u1ea3i b\u1ea3n ch\u1ea5t c\u1ed1t l\u00f5i c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khong-the-tao-doi-tuong-truc-tiep\"><\/span>Kh\u00f4ng th\u1ec3 t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng tr\u1ef1c ti\u1ebfp<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u01b0\u01a1ng t\u1ef1 nh\u01b0 Abstract Class, b\u1ea1n kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a <code>new<\/code> \u0111\u1ec3 t\u1ea1o ra m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng (object) tr\u1ef1c ti\u1ebfp t\u1eeb Interface. Interface b\u1ea3n th\u00e2n n\u00f3 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m tr\u1eebu t\u01b0\u1ee3ng, m\u1ed9t b\u1ea3n thi\u1ebft k\u1ebf. N\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t &#8220;v\u1eadt th\u1ec3&#8221; ho\u00e0n ch\u1ec9nh c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp trong b\u1ed9 nh\u1edb \u0111\u1ec3 g\u1ecdi c\u00e1c ph\u01b0\u01a1ng th\u1ee9c.<\/p>\n<p>\u0110\u1ec3 s\u1eed d\u1ee5ng c\u00e1c h\u00e0nh vi \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong Interface, b\u1ea1n c\u1ea7n t\u1ea1o m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eeb m\u1ed9t l\u1edbp c\u1ee5 th\u1ec3 <strong>tri\u1ec3n khai (implements) Interface \u0111\u00f3<\/strong>. L\u1edbp n\u00e0y \u0111\u00e3 cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 c\u00e0i \u0111\u1eb7t cho c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng, bi\u1ebfn b\u1ea3n thi\u1ebft k\u1ebf th\u00e0nh m\u1ed9t th\u1ef1c th\u1ec3 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khong-co-thuoc-tinh-trang-thai\"><\/span>Kh\u00f4ng c\u00f3 thu\u1ed9c t\u00ednh tr\u1ea1ng th\u00e1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Interface kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p ch\u1ee9a c\u00e1c bi\u1ebfn th\u1ec3 hi\u1ec7n (instance variables) hay c\u00f2n g\u1ecdi l\u00e0 c\u00e1c thu\u1ed9c t\u00ednh \u0111\u1ec3 l\u01b0u tr\u1eef tr\u1ea1ng th\u00e1i ri\u00eang bi\u1ec7t c\u1ee7a t\u1eebng \u0111\u1ed1i t\u01b0\u1ee3ng. M\u1ee5c \u0111\u00edch c\u1ee7a Interface ch\u1ec9 l\u00e0 \u0111\u1ecbnh ngh\u0129a h\u00e0nh vi (c\u00e1c ph\u01b0\u01a1ng th\u1ee9c), kh\u00f4ng ph\u1ea3i d\u1eef li\u1ec7u c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c h\u1eb1ng s\u1ed1 (constants), th\u01b0\u1eddng l\u00e0 <code>public static final<\/code> v\u00e0 \u0111\u01b0\u1ee3c truy c\u1eadp th\u00f4ng qua t\u00ean Interface.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-thanh-vien-mac-dinh-la-Public-va-Abstract\"><\/span>C\u00e1c th\u00e0nh vi\u00ean m\u1eb7c \u0111\u1ecbnh l\u00e0 Public v\u00e0 Abstract<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong Interface, t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh vi\u00ean \u0111\u01b0\u1ee3c khai b\u00e1o (ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng v\u00e0 h\u1eb1ng s\u1ed1) m\u1eb7c \u0111\u1ecbnh c\u00f3 m\u1ee9c truy c\u1eadp l\u00e0 <code>public<\/code>. B\u1ea1n kh\u00f4ng c\u1ea7n ghi t\u1eeb kh\u00f3a <code>public<\/code> m\u1ed9t c\u00e1ch t\u01b0\u1eddng minh (m\u1eb7c d\u00f9 ghi c\u0169ng kh\u00f4ng sai).<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1, c\u00e1c ph\u01b0\u01a1ng th\u1ee9c (kh\u00f4ng ph\u1ea3i default\/static) m\u1eb7c \u0111\u1ecbnh l\u00e0 <code>abstract<\/code>. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o tri\u1ec3n khai Interface \u0111\u1ec1u c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y v\u00e0 c\u00e0i \u0111\u1eb7t c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Yeu-cau-lop-trien-khai-phai-cai-dat\"><\/span>Y\u00eau c\u1ea7u l\u1edbp tri\u1ec3n khai ph\u1ea3i c\u00e0i \u0111\u1eb7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"color: #333333; font-size: 15px;\">\u0110\u00e2y l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng nh\u1ea5t th\u1ec3 hi\u1ec7n t\u00ednh &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; c\u1ee7a Interface. B\u1ea5t k\u1ef3 l\u1edbp n\u00e0o<\/span><span style=\"color: #333333; font-size: 15px;\"> tri\u1ec3n khai (implement)<\/span><span style=\"color: #333333; font-size: 15px;\"> m\u1ed9t Interface <\/span><span style=\"color: #333333; font-size: 15px;\">bu\u1ed9c ph\u1ea3i cung c\u1ea5p ph\u1ea7n c\u00e0i \u0111\u1eb7t c\u1ee5 th\u1ec3 cho <\/span><strong style=\"color: #333333; font-size: 15px;\">t\u1ea5t c\u1ea3\u00a0c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng<\/strong><span style=\"color: #333333; font-size: 15px;\"> \u0111\u01b0\u1ee3c khai b\u00e1o trong Interface \u0111\u00f3.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Interface-co-the-Ke-thua-Interface-khac\"><\/span>Interface c\u00f3 th\u1ec3 K\u1ebf th\u1eeba Interface kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Interface c\u00f3 kh\u1ea3 n\u0103ng k\u1ebf th\u1eeba t\u1eeb m\u1ed9t ho\u1eb7c nhi\u1ec1u Interface kh\u00e1c b\u1eb1ng t\u1eeb kh\u00f3a <code>extends<\/code>. Kh\u00e1i ni\u1ec7m n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 l\u1edbp con k\u1ebf th\u1eeba l\u1edbp cha, nh\u01b0ng \u00e1p d\u1ee5ng cho Interface. Interface con s\u1ebd &#8220;th\u1eeba k\u1ebf&#8221; t\u1ea5t c\u1ea3 c\u00e1c khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c v\u00e0 h\u1eb1ng s\u1ed1 t\u1eeb c\u00e1c Interface cha v\u00e0 c\u00f3 th\u1ec3 th\u00eam c\u00e1c \u0111\u1ecbnh ngh\u0129a m\u1edbi c\u1ee7a ri\u00eang m\u00ecnh. \u0110\u00e2y l\u00e0 c\u00e1ch m\u1edf r\u1ed9ng &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; ho\u1eb7c k\u1ebft h\u1ee3p nhi\u1ec1u &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; nh\u1ecf th\u00e0nh m\u1ed9t &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; l\u1edbn h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vi-du-cac-cu-phap-co-ban-cua-Interface\"><\/span>V\u00ed d\u1ee5 c\u00e1c c\u00fa ph\u00e1p c\u01a1 b\u1ea3n c\u1ee7a Interface<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c hi\u1ec3u v\u00e0 vi\u1ebft \u0111\u00fang c\u00fa ph\u00e1p l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 s\u1eed d\u1ee5ng Interface m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00fa ph\u00e1p c\u1ee7a Interface kh\u00e1 m\u1ea1ch l\u1ea1c, ph\u1ea3n \u00e1nh b\u1ea3n ch\u1ea5t &#8220;khu\u00f4n m\u1eabu&#8221; ho\u1eb7c &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; c\u1ee7a n\u00f3.<\/p>\n<p>C\u00fa ph\u00e1p c\u00f3 th\u1ec3 kh\u00e1c bi\u1ec7t ch\u00fat \u00edt gi\u1eefa c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c nhau, nh\u01b0ng nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n th\u01b0\u1eddng l\u00e0 t\u01b0\u01a1ng \u0111\u1ed3ng. T\u1eadp trung v\u00e0o c\u00fa ph\u00e1p trong c\u00e1c ng\u00f4n ng\u1eef ph\u1ed5 bi\u1ebfn nh\u01b0 Java v\u00e0 C# s\u1ebd gi\u00fap b\u1ea1n n\u1eafm v\u1eefng n\u1ec1n t\u1ea3ng chung.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cu-phap-Khai-bao-Interface\"><\/span>C\u00fa ph\u00e1p Khai b\u00e1o Interface<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 t\u1ea1o m\u1ed9t Interface m\u1edbi, b\u1ea1n s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a <code>interface<\/code> theo sau l\u00e0 t\u00ean c\u1ee7a Interface \u0111\u00f3. Theo quy \u01b0\u1edbc chung, t\u00ean Interface n\u00ean b\u1eaft \u0111\u1ea7u b\u1eb1ng ch\u1eef in hoa, v\u00e0 trong nhi\u1ec1u ng\u00f4n ng\u1eef nh\u01b0 C#, ng\u01b0\u1eddi ta th\u01b0\u1eddng th\u00eam ch\u1eef &#8220;I&#8221; \u1edf \u0111\u1ea7u t\u00ean \u0111\u1ec3 d\u1ec5 nh\u1eadn bi\u1ebft (v\u00ed d\u1ee5: <code>IShape<\/code>, <code>IDataService<\/code>).<\/p>\n<p>B\u00ean trong c\u1eb7p d\u1ea5u ngo\u1eb7c nh\u1ecdn <code>{}<\/code> l\u00e0 n\u01a1i b\u1ea1n \u0111\u1ecbnh ngh\u0129a c\u00e1c th\u00e0nh vi\u00ean c\u1ee7a Interface \u2013 ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c <strong>khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c (method declarations)<\/strong> (ch\u1ec9 ch\u1eef k\u00fd, kh\u00f4ng c\u00f3 th\u00e2n c\u00e0i \u0111\u1eb7t) v\u00e0 c\u00e1c <strong>h\u1eb1ng s\u1ed1 (constants)<\/strong>. T\u1eeb kh\u00f3a truy c\u1eadp <code>public<\/code> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho Interface \u0111\u1ec3 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp r\u1ed9ng r\u00e3i.<\/p>\n<p><strong>Java<\/strong><\/p>\n<pre><code class=\"language-plaintext\">\/\/ V\u00ed d\u1ee5 c\u00fa ph\u00e1p khai b\u00e1o Interface trong Java\r\npublic interface IDongVat {\r\n    \/\/ Khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng (m\u1eb7c \u0111\u1ecbnh public abstract)\r\n    void diChuyen();\r\n    void tiengKeu();\r\n\r\n    \/\/ Khai b\u00e1o h\u1eb1ng s\u1ed1 (m\u1eb7c \u0111\u1ecbnh public static final)\r\n    int SO_CHAN_MAC_DINH = 4;\r\n}\r\n<\/code><\/pre>\n<p><strong>C#<\/strong><\/p>\n<pre><code class=\"language-plaintext\">\/\/ V\u00ed d\u1ee5 c\u00fa ph\u00e1p khai b\u00e1o Interface trong C#\r\npublic interface IDongVat \/\/ Quy \u01b0\u1edbc t\u00ean b\u1eaft \u0111\u1ea7u b\u1eb1ng 'I'\r\n{\r\n    \/\/ Khai b\u00e1o ph\u01b0\u01a1ng th\u1ee9c (m\u1eb7c \u0111\u1ecbnh public)\r\n    void DiChuyen();\r\n    void TiengKeu();\r\n\r\n    \/\/ Khai b\u00e1o Property (ch\u1ec9 \u0111\u1ecbnh getter\/setter)\r\n    string TenLoai { get; set; }\r\n}\r\n<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Cu-phap-Trien-khai-Interface\"><\/span>C\u00fa ph\u00e1p Tri\u1ec3n khai Interface<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi b\u1ea1n c\u00f3 m\u1ed9t l\u1edbp (Class) mu\u1ed1n tu\u00e2n th\u1ee7 &#8220;h\u1ee3p \u0111\u1ed3ng&#8221; do m\u1ed9t Interface \u0111\u1ecbnh ngh\u0129a, l\u1edbp \u0111\u00f3 c\u1ea7n <strong>tri\u1ec3n khai (implement)<\/strong> Interface \u0111\u00f3. B\u1ea1n th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y trong ph\u1ea7n khai b\u00e1o c\u1ee7a l\u1edbp, ngay sau t\u00ean l\u1edbp. Trong Java v\u00e0 PHP, b\u1ea1n d\u00f9ng t\u1eeb kh\u00f3a <code>implements<\/code>. Trong C#, b\u1ea1n d\u00f9ng d\u1ea5u hai ch\u1ea5m <code>:<\/code><\/p>\n<p>M\u1ed9t l\u1edbp c\u00f3 th\u1ec3 tri\u1ec3n khai m\u1ed9t ho\u1eb7c nhi\u1ec1u Interface b\u1eb1ng c\u00e1ch li\u1ec7t k\u00ea t\u00ean c\u00e1c Interface sau t\u1eeb kh\u00f3a <code>implements<\/code> ho\u1eb7c d\u1ea5u <code>:<\/code>, c\u00e1ch nhau b\u1edfi d\u1ea5u ph\u1ea9y. L\u1edbp tri\u1ec3n khai <strong>bu\u1ed9c ph\u1ea3i cung c\u1ea5p ph\u1ea7n c\u00e0i \u0111\u1eb7t chi ti\u1ebft<\/strong> (th\u00e2n ph\u01b0\u01a1ng th\u1ee9c) cho t\u1ea5t c\u1ea3\u00a0c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c khai b\u00e1o trong Interface m\u00e0 n\u00f3 cam k\u1ebft tri\u1ec3n khai.<\/p>\n<p><strong>Java<\/strong><\/p>\n<pre><code class=\"language-plaintext\">\/\/ V\u00ed d\u1ee5 c\u00fa ph\u00e1p tri\u1ec3n khai v\u00e0 s\u1eed d\u1ee5ng Interface trong Java\r\n\r\n\/\/ L\u1edbp Cho tri\u1ec3n khai Interface IDongVat\r\nclass Cho implements IDongVat {\r\n    @Override \/\/ S\u1eed d\u1ee5ng annotation @Override \u0111\u1ec3 ki\u1ec3m tra t\u00ednh \u0111\u00fang \u0111\u1eafn\r\n    public void diChuyen() {\r\n        \/\/ C\u00e0i \u0111\u1eb7t chi ti\u1ebft c\u00e1ch ch\u00f3 di chuy\u1ec3n\r\n        System.out.println(\"Ch\u00f3 ch\u1ea1y b\u1eb1ng \" + SO_CHAN_MAC_DINH + \" ch\u00e2n.\");\r\n    }\r\n\r\n    @Override\r\n    public void tiengKeu() {\r\n        \/\/ C\u00e0i \u0111\u1eb7t chi ti\u1ebft ti\u1ebfng k\u00eau c\u1ee7a ch\u00f3\r\n        System.out.println(\"G\u00e2u g\u00e2u!\");\r\n    }\r\n\r\n    \/\/ L\u1edbp c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ri\u00eang kh\u00f4ng c\u00f3 trong Interface\r\n    public void canhNha() {\r\n        System.out.println(\"Ch\u00f3 \u0111ang canh nh\u00e0.\");\r\n    }\r\n}\r\n\r\n\/\/ V\u00ed d\u1ee5 s\u1eed d\u1ee5ng\r\npublic class ViDuSuDungInterface {\r\n    public static void main(String[] args) {\r\n        \/\/ S\u1eed d\u1ee5ng bi\u1ebfn ki\u1ec3u Interface tham chi\u1ebfu \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp tri\u1ec3n khai (\u0110a h\u00ecnh)\r\n        IDongVat dongVat = new Cho();\r\n        dongVat.diChuyen(); \/\/ G\u1ecdi ph\u01b0\u01a1ng th\u1ee9c qua bi\u1ebfn ki\u1ec3u Interface\r\n        dongVat.tiengKeu();\r\n\r\n        \/\/ Kh\u00f4ng th\u1ec3 g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c ri\u00eang c\u1ee7a l\u1edbp Cho qua bi\u1ebfn dongVat ki\u1ec3u IDongVat\r\n        \/\/ dongVat.canhNha(); \/\/ --&gt; L\u1ed7i bi\u00ean d\u1ecbch\r\n\r\n        \/\/ Truy c\u1eadp h\u1eb1ng s\u1ed1 qua t\u00ean Interface\r\n        System.out.println(\"S\u1ed1 ch\u00e2n m\u1eb7c \u0111\u1ecbnh t\u1eeb Interface: \" + IDongVat.SO_CHAN_MAC_DINH);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p><strong>C#<\/strong><\/p>\n<pre><code class=\"language-plaintext\">\/\/ V\u00ed d\u1ee5 c\u00fa ph\u00e1p tri\u1ec3n khai v\u00e0 s\u1eed d\u1ee5ng Interface trong C#\r\n\r\n\/\/ L\u1edbp Cho tri\u1ec3n khai Interface IDongVat\r\nclass Cho : IDongVat \/\/ D\u00f9ng ':' \u0111\u1ec3 tri\u1ec3n khai\r\n{\r\n    \/\/ B\u1eaft bu\u1ed9c c\u00e0i \u0111\u1eb7t ph\u01b0\u01a1ng th\u1ee9c DiChuyen()\r\n    public void DiChuyen()\r\n    {\r\n        System.Console.WriteLine(\"Ch\u00f3 ch\u1ea1y.\");\r\n    }\r\n\r\n    \/\/ B\u1eaft bu\u1ed9c c\u00e0i \u0111\u1eb7t ph\u01b0\u01a1ng th\u1ee9c TiengKeu()\r\n    public void TiengKeu()\r\n    {\r\n        System.Console.WriteLine(\"G\u00e2u g\u00e2u!\");\r\n    }\r\n\r\n    \/\/ B\u1eaft bu\u1ed9c c\u00e0i \u0111\u1eb7t Property TenLoai\r\n    public string TenLoai { get; set; } \/\/ C\u00e0i \u0111\u1eb7t t\u1ef1 \u0111\u1ed9ng (auto-implemented property)\r\n\r\n    \/\/ L\u1edbp c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ri\u00eang\r\n    public void CanhNha()\r\n    {\r\n        System.Console.WriteLine(\"Ch\u00f3 \u0111ang canh nh\u00e0.\");\r\n    }\r\n}\r\n\r\n\/\/ V\u00ed d\u1ee5 s\u1eed d\u1ee5ng\r\npublic class ViDuSuDungInterface\r\n{\r\n    public static void Main(string[] args)\r\n    {\r\n        \/\/ S\u1eed d\u1ee5ng bi\u1ebfn ki\u1ec3u Interface tham chi\u1ebfu \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp tri\u1ec3n khai\r\n        IDongVat dongVat = new Cho();\r\n        dongVat.DiChuyen(); \/\/ G\u1ecdi qua Interface\r\n        dongVat.TiengKeu();\r\n\r\n        \/\/ S\u1eed d\u1ee5ng Property qua Interface\r\n        dongVat.TenLoai = \"Ch\u00f3 nh\u00e0\";\r\n        System.Console.WriteLine(\"Lo\u1ea1i \u0111\u1ed9ng v\u1eadt: \" + dongVat.TenLoai);\r\n\r\n        \/\/ C\u00f3 th\u1ec3 \u00e9p ki\u1ec3u v\u1ec1 l\u1edbp c\u1ee5 th\u1ec3 n\u1ebfu c\u1ea7n d\u00f9ng ph\u01b0\u01a1ng th\u1ee9c ri\u00eang\r\n        if (dongVat is Cho cho)\r\n        {\r\n            cho.CanhNha();\r\n        }\r\n    }\r\n}<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-loi-ich-cua-Interface-trong-lap-trinh\"><\/span>Nh\u1eefng l\u1ee3i \u00edch c\u1ee7a Interface trong l\u1eadp tr\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng Interface trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng ch\u1ec9 l\u00e0 tu\u00e2n th\u1ee7 m\u1ed9t quy t\u1eafc c\u00fa ph\u00e1p, m\u00e0 n\u00f3 mang l\u1ea1i nhi\u1ec1u gi\u00e1 tr\u1ecb c\u1ed1t l\u00f5i, gi\u00fap gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p trong thi\u1ebft k\u1ebf v\u00e0 ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m. Interface l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng linh ho\u1ea1t, c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 d\u1ec5 d\u00e0ng b\u1ea3o tr\u00ec.<\/p>\n<p>Hi\u1ec3u r\u00f5 nh\u1eefng l\u1ee3i \u00edch n\u00e0y s\u1ebd gi\u00fap b\u1ea1n nh\u00ecn nh\u1eadn Interface kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m tr\u1eebu t\u01b0\u1ee3ng, m\u00e0 l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ea5t l\u01b0\u1ee3ng cao. C\u00e1c l\u1ee3i \u00edch n\u00e0y li\u00ean quan ch\u1eb7t ch\u1ebd \u0111\u1ebfn c\u00e1c nguy\u00ean l\u00fd c\u1ee7a OOP v\u00e0 thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m hi\u1ec7u qu\u1ea3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-da-hinh-manh-me\"><\/span>H\u1ed7 tr\u1ee3 \u0111a h\u00ecnh m\u1ea1nh m\u1ebd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Interface l\u00e0 m\u1ed9t trong nh\u1eefng c\u01a1 ch\u1ebf ch\u00ednh \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh \u0111a h\u00ecnh trong l\u1eadp tr\u00ecnh. N\u00f3 cho ph\u00e9p b\u1ea1n khai b\u00e1o c\u00e1c bi\u1ebfn c\u00f3 ki\u1ec3u l\u00e0 Interface, v\u00e0 c\u00e1c bi\u1ebfn n\u00e0y c\u00f3 th\u1ec3 tham chi\u1ebfu \u0111\u1ebfn b\u1ea5t k\u1ef3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o c\u1ee7a l\u1edbp \u0111\u00e3 tri\u1ec3n khai Interface \u0111\u00f3. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p b\u1ea1n x\u1eed l\u00fd c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau th\u00f4ng qua m\u1ed9t giao di\u1ec7n chung, gi\u1ea3m s\u1ef1 ph\u1ee9c t\u1ea1p v\u00e0 t\u0103ng t\u00ednh linh ho\u1ea1t.<\/p>\n<figure id=\"attachment_28018\" aria-describedby=\"caption-attachment-28018\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Nhung-loi-ich-cua-Interface-trong-lap-trinh.jpg\" alt=\"Nh\u1eefng l\u1ee3i \u00edch c\u1ee7a Interface trong l\u1eadp tr\u00ecnh\" width=\"800\" height=\"500\" class=\"size-full wp-image-28018\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Nhung-loi-ich-cua-Interface-trong-lap-trinh.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Nhung-loi-ich-cua-Interface-trong-lap-trinh-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Nhung-loi-ich-cua-Interface-trong-lap-trinh-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Nhung-loi-ich-cua-Interface-trong-lap-trinh-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28018\" class=\"wp-caption-text\">Nh\u1eefng l\u1ee3i \u00edch c\u1ee7a Interface trong l\u1eadp tr\u00ecnh<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Dat-duoc-tinh-truu-tuong\"><\/span>\u0110\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh tr\u1eebu t\u01b0\u1ee3ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Interface l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111\u1eafc l\u1ef1c \u0111\u1ec3 th\u1ef1c hi\u1ec7n <strong>tr\u1eebu t\u01b0\u1ee3ng h\u00f3a<\/strong>. B\u1eb1ng c\u00e1ch ch\u1ec9 \u0111\u1ecbnh ngh\u0129a c\u00e1c h\u00e0nh vi (ph\u01b0\u01a1ng th\u1ee9c) m\u00e0 kh\u00f4ng cung c\u1ea5p c\u00e0i \u0111\u1eb7t chi ti\u1ebft, Interface cho ph\u00e9p b\u1ea1n t\u1eadp trung v\u00e0o &#8220;nh\u1eefng g\u00ec&#8221; m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m, thay v\u00ec &#8220;c\u00e1ch th\u1ee9c&#8221; c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y gi\u00fap che gi\u1ea5u s\u1ef1 ph\u1ee9c t\u1ea1p n\u1ed9i b\u1ed9 c\u1ee7a c\u00e1c l\u1edbp, ch\u1ec9 ph\u01a1i b\u00e0y nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng Interface.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Giup-giam-su-phu-thuoc\"><\/span>Gi\u00fap gi\u1ea3m s\u1ef1 ph\u1ee5 thu\u1ed9c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"color: #333333; font-size: 15px;\">Khi c\u00e1c module ho\u1eb7c l\u1edbp trong ch\u01b0\u01a1ng tr\u00ecnh c\u1ee7a b\u1ea1n t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau th\u00f4ng qua Interface thay v\u00ec tr\u1ef1c ti\u1ebfp th\u00f4ng qua c\u00e1c l\u1edbp c\u1ee5 th\u1ec3, b\u1ea1n \u0111ang t\u1ea1o ra m\u1ed9t <strong>c\u1ea5u tr\u00fac <\/strong><\/span><strong style=\"color: #333333; font-size: 15px;\">li\u00ean k\u1ebft l\u1ecfng (loosely coupled)<\/strong><span style=\"color: #333333; font-size: 15px;\">.<\/span><\/p>\n<p>Thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t b\u00ean trong c\u1ee7a m\u1ed9t l\u1edbp tri\u1ec3n khai Interface s\u1ebd \u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c l\u1edbp kh\u00e1c s\u1eed d\u1ee5ng n\u00f3 qua Interface, mi\u1ec5n l\u00e0 Interface kh\u00f4ng thay \u0111\u1ed5i. \u0110i\u1ec1u n\u00e0y gi\u00fap h\u1ec7 th\u1ed1ng d\u1ec5 d\u00e0ng thay \u0111\u1ed5i v\u00e0 m\u1edf r\u1ed9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mo-phong-da-ke-thua\"><\/span>M\u00f4 ph\u1ecfng \u0111a k\u1ebf th\u1eeba<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong nhi\u1ec1u ng\u00f4n ng\u1eef OOP ph\u1ed5 bi\u1ebfn nh\u01b0 Java v\u00e0 C#, ch\u1ec9 h\u1ed7 tr\u1ee3 <strong>\u0111\u01a1n k\u1ebf th\u1eeba l\u1edbp<\/strong> (m\u1ed9t l\u1edbp ch\u1ec9 c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha tr\u1ef1c ti\u1ebfp). Interface gi\u1ea3i quy\u1ebft h\u1ea1n ch\u1ebf n\u00e0y b\u1eb1ng c\u00e1ch cho ph\u00e9p m\u1ed9t l\u1edbp c\u00f3 th\u1ec3 <strong>tri\u1ec3n khai (implements)<\/strong> nhi\u1ec1u Interface c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<p>\u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u1ed9t l\u1edbp &#8220;th\u1eeba h\u01b0\u1edfng&#8221; c\u00e1c t\u1eadp h\u1ee3p h\u00e0nh vi t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111a k\u1ebf th\u1eeba nh\u01b0ng tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p c\u1ee7a n\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Chuan-hoa-thiet-ke\"><\/span>Chu\u1ea9n h\u00f3a thi\u1ebft k\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Interface \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t b\u1ed9 quy t\u1eafc ho\u1eb7c ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c m\u00e0 c\u00e1c l\u1edbp c\u1ea7n tu\u00e2n theo. Khi l\u00e0m vi\u1ec7c trong m\u1ed9t nh\u00f3m ho\u1eb7c ph\u00e1t tri\u1ec3n c\u00e1c th\u01b0 vi\u1ec7n, vi\u1ec7c \u0111\u1ecbnh ngh\u0129a v\u00e0 s\u1eed d\u1ee5ng Interface gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1ch c\u00e1c module t\u01b0\u01a1ng t\u00e1c. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o tuy\u00ean b\u1ed1 tri\u1ec3n khai m\u1ed9t Interface \u0111\u1ec1u cung c\u1ea5p c\u00e1c h\u00e0nh vi \u0111\u00e3 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh, t\u1ea1o s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 hi\u1ec3u cho codebase.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-kiem-thu\"><\/span>H\u1ed7 tr\u1ee3 ki\u1ec3m th\u1eed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>S\u1eed d\u1ee5ng Interface gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng <strong>ki\u1ec3m th\u1eed (testing)<\/strong> c\u1ee7a code. Khi c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ee5 thu\u1ed9c v\u00e0o Interface thay v\u00ec c\u00e1c l\u1edbp c\u1ee5 th\u1ec3, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u1ea1o ra c\u00e1c <strong>\u0111\u1ed1i t\u01b0\u1ee3ng gi\u1ea3 (mock objects)<\/strong> ho\u1eb7c <strong>\u0111\u1ed1i t\u01b0\u1ee3ng stub (stub objects)<\/strong> tri\u1ec3n khai Interface \u0111\u00f3 \u0111\u1ec3 ki\u1ec3m th\u1eed c\u00e1c module kh\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f4 l\u1eadp \u0111\u01a1n v\u1ecb code c\u1ea7n ki\u1ec3m th\u1eed, gi\u00fap vi\u1ebft unit test hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh\"><\/span>\u0110i\u1ec3m gi\u1ed1ng v\u00e0 kh\u00e1c nhau gi\u1eefa Interface v\u00e0 Abstract Class trong l\u1eadp tr\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Interface v\u00e0 Abstract Class c\u00f3 nhi\u1ec1u \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng, nh\u01b0ng c\u0169ng c\u00f3 nh\u1eefng kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t. C\u1ea3 hai \u0111\u1ec1u c\u00f3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng (abstract methods) v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai (implement) trong c\u00e1c l\u1edbp kh\u00e1c.<\/p>\n<p>Qu\u00e1 tr\u00ecnh cung c\u1ea5p c\u00e0i \u0111\u1eb7t cho c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng trong interface ho\u1eb7c Abstract Class \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tri\u1ec3n khai (implement) ho\u1eb7c ghi \u0111\u00e8 (override) ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f3 trong l\u1edbp con ho\u1eb7c l\u1edbp tri\u1ec3n khai. Kh\u00e1i ni\u1ec7m &#8220;m\u1edf r\u1ed9ng (extend)&#8221; ch\u1ec9 \u00e1p d\u1ee5ng khi m\u1ed9t l\u1edbp k\u1ebf th\u1eeba l\u1edbp kh\u00e1c ho\u1eb7c m\u1ed9t Interface k\u1ebf th\u1eeba Interface kh\u00e1c.<\/p>\n<figure id=\"attachment_28017\" aria-describedby=\"caption-attachment-28017\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh.jpg\" alt=\"\u0110i\u1ec3m gi\u1ed1ng v\u00e0 kh\u00e1c nhau gi\u1eefa Interface v\u00e0 Abstract Class trong l\u1eadp tr\u00ecnh\" width=\"800\" height=\"500\" class=\"size-full wp-image-28017\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Diem-giong-va-khac-nhau-giua-Interface-va-Abstract-Class-trong-lap-trinh-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28017\" class=\"wp-caption-text\">\u0110i\u1ec3m gi\u1ed1ng v\u00e0 kh\u00e1c nhau gi\u1eefa Interface v\u00e0 Abstract Class trong l\u1eadp tr\u00ecnh<\/figcaption><\/figure>\n<p><strong>\u0110i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa Interface v\u00e0 Abstract Class<\/strong><\/p>\n<ul>\n<li><strong>V\u1ec1 c\u00fa ph\u00e1p:<\/strong> C\u00e1c ph\u01b0\u01a1ng th\u1ee9c trong interface ph\u1ea3i l\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1ed1ng, t\u1ee9c l\u00e0 ch\u1ec9 c\u00f3 t\u00ean ph\u01b0\u01a1ng th\u1ee9c, tham s\u1ed1 v\u00e0 ki\u1ec3u d\u1eef li\u1ec7u tr\u1ea3 v\u1ec1, m\u00e0 kh\u00f4ng c\u00f3 logic b\u00ean trong. Ng\u01b0\u1ee3c l\u1ea1i, Abstract Class cho ph\u00e9p b\u1ea1n \u0111\u1ecbnh ngh\u0129a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng th\u1ee9c th\u00f4ng th\u01b0\u1eddng, c\u00f3 th\u1ec3 c\u00f3 n\u1ed9i dung v\u00e0 logic trong th\u00e2n ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n<li><strong>V\u1ec1 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng:<\/strong>Interface l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 th\u00eam kh\u1ea3 n\u0103ng ho\u1eb7c <strong>quy \u0111\u1ecbnh h\u00e0nh vi<\/strong> cho b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o th\u00f4ng qua vi\u1ec7c \u0111\u1ecbnh ngh\u0129a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c. N\u00f3 t\u1eadp trung v\u00e0o vi\u1ec7c &#8220;m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m g\u00ec&#8221;. C\u00f2n Abstract Class \u0111\u00f3ng vai tr\u00f2 l\u00e0 l\u1edbp cha cho t\u1ea5t c\u1ea3 c\u00e1c l\u1edbp c\u00f3 c\u00f9ng \u0111\u1eb7c \u0111i\u1ec3m, b\u1ea3n ch\u1ea5t, lo\u1ea1i ho\u1eb7c nhi\u1ec7m v\u1ee5, t\u1eadp trung v\u00e0o m\u1ed1i quan h\u1ec7 &#8220;l\u00e0 m\u1ed9t lo\u1ea1i&#8221; (Is-A Kind Of)..<\/li>\n<\/ul>\n<p>Nh\u01b0 v\u1eady, qua b\u00e0i vi\u1ebft n\u00e0y, hy v\u1ecdng b\u1ea1n \u0111\u00e3 c\u00f3 c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u00e0 \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 Interface l\u00e0 g\u00ec trong l\u1eadp tr\u00ecnh.\u00a0Vi\u1ec7c n\u1eafm v\u1eefng v\u00e0 \u00e1p d\u1ee5ng Interface s\u1ebd mang l\u1ea1i cho b\u1ea1n nh\u1eefng l\u1ee3i \u00edch to l\u1edbn.<\/p>\n<p>Sau khi hi\u1ec3u v\u1ec1 Interface, ng\u01b0\u1eddi h\u1ecdc s\u1ebd mu\u1ed1n \u00e1p d\u1ee5ng v\u00e0o c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf (v\u00ed d\u1ee5: x\u00e2y d\u1ef1ng m\u1ed9t \u1ee9ng d\u1ee5ng web backend, m\u1ed9t API service). Nh\u1eefng d\u1ef1 \u00e1n n\u00e0y c\u1ea7n m\u00f4i tr\u01b0\u1eddng m\u00e1y ch\u1ee7 \u0111\u1ec3 ch\u1ea1y (develop, test, deploy) ho\u1eb7c l\u1eadp tr\u00ecnh vi\u00ean c\u1ea7n n\u01a1i \u0111\u1ec3 tri\u1ec3n khai c\u00e1c demo d\u1ef1 \u00e1n c\u00e1 nh\u00e2n (portfolio), ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ecf cho ng\u01b0\u1eddi d\u00f9ng th\u1ef1c t\u1ebf.<\/p>\n<p>\u0110\u1ec3 \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 nhanh ch\u00f3ng, vi\u1ec7c l\u1ef1a ch\u1ecdn h\u1ea1 t\u1ea7ng m\u00e1y ch\u1ee7 ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng. InterData mang \u0111\u1ebfn gi\u1ea3i ph\u00e1p v\u1edbi d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/thue-hosting\/\">Hosting gi\u00e1 r\u1ebb t\u1ed1c \u0111\u1ed9 cao<\/a>, cung c\u1ea5p n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho website v\u00e0 \u1ee9ng d\u1ee5ng nh\u1ecf c\u1ee7a b\u1ea1n.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n c\u1ea7n t\u00e0i nguy\u00ean l\u1edbn h\u01a1n ho\u1eb7c quy\u1ec1n ki\u1ec3m so\u00e1t cao h\u01a1n, b\u1ea1n c\u00f3 th\u1ec3 c\u00e2n nh\u1eafc <a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS ch\u1ea5t l\u01b0\u1ee3ng gi\u00e1 r\u1ebb<\/a> ho\u1eb7c <a href=\"https:\/\/interdata.vn\/cloud-server\/\">thu\u00ea Cloud Server gi\u00e1 r\u1ebb t\u1ed1c \u0111\u1ed9 cao<\/a> t\u1ea1i InterData. V\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng ph\u1ea7n c\u1ee9ng th\u1ebf h\u1ec7 m\u1edbi nh\u01b0 CPU AMD EPYC\/Intel Xeon Platinum v\u00e0 \u1ed5 c\u1ee9ng SSD NVMe U.2 dung l\u01b0\u1ee3ng t\u1ed1i \u01b0u c\u00f9ng b\u0103ng th\u00f4ng cao, d\u1ecbch v\u1ee5 \u0111\u1ea3m b\u1ea3o \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ch\u1ea1y tr\u00ean h\u1ea1 t\u1ea7ng c\u1ea5u h\u00ecnh m\u1ea1nh, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u1ed5n \u0111\u1ecbnh. H\u00e3y li\u00ean h\u1ec7 InterData \u0111\u1ec3 nh\u1eadn t\u01b0 v\u1ea5n gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho nhu c\u1ea7u c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>INTERDATA<\/strong><\/p>\n<ul>\n<li><strong>Website:<\/strong><span>\u00a0<\/span>Interdata.vn<\/li>\n<li><strong>Hotline:<\/strong><span>\u00a0<\/span>1900-636822<\/li>\n<li><strong>Email:<\/strong><span>\u00a0<\/span>Info@interdata.vn<\/li>\n<li><strong>VP\u0110D:<\/strong><span>\u00a0<\/span>240 Nguy\u1ec5n \u0110\u00ecnh Ch\u00ednh, P.11. Q. Ph\u00fa Nhu\u1eadn, TP. Ho\u0302\u0300 Ch\u00ed Minh<\/li>\n<li><strong>VPGD:<\/strong><span>\u00a0<\/span>S\u1ed1 211 \u0110\u01b0\u1eddng s\u1ed1 5, K\u0110T Lakeview City, P. An Ph\u00fa, TP. Th\u1ee7 \u0110\u1ee9c, TP. H\u1ed3 Ch\u00ed Minh<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Interface l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng c\u1ee7a L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) nh\u01b0ng th\u01b0\u1eddng g\u00e2y b\u1ed1i r\u1ed1i cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u. Hi\u1ec3u r\u00f5 Interface l\u00e0 g\u00ec v\u00e0 vai tr\u00f2 c\u1ee7a n\u00f3 l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 vi\u1ebft code linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n, m\u1edf ra c\u00e1nh c\u1eeda \u0111\u1ec3 l\u00e0m ch\u1ee7<\/p>\n","protected":false},"author":11,"featured_media":28019,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[140],"tags":[],"class_list":["post-28015","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lap-trinh"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=28015"}],"version-history":[{"count":5,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28015\/revisions"}],"predecessor-version":[{"id":28462,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28015\/revisions\/28462"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/28019"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=28015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=28015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=28015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}