{"id":477598,"date":"2023-08-09T09:17:42","date_gmt":"2023-08-09T09:17:42","guid":{"rendered":""},"modified":"2023-09-05T11:15:01","modified_gmt":"2023-09-05T11:15:01","slug":"inheritance","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/inheritance\/","title":{"rendered":"Di s\u1ea3n"},"content":{"rendered":"<p>K\u1ebf th\u1eeba l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) cho ph\u00e9p m\u1ed9t l\u1edbp (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 l\u1edbp con ho\u1eb7c l\u1edbp d\u1eabn xu\u1ea5t) k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a m\u1ed9t l\u1edbp kh\u00e1c (\u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 si\u00eau l\u1edbp ho\u1eb7c l\u1edbp c\u01a1 s\u1edf). \u0110\u00f3 l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf m\u00e0 qua \u0111\u00f3 m\u1ed9t l\u1edbp c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a l\u1edbp kh\u00e1c, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng m\u00e3 v\u00e0 th\u00fac \u0111\u1ea9y t\u1ed5 ch\u1ee9c c\u00e1c l\u1edbp c\u00f3 th\u1ee9 b\u1eadc. B\u1eb1ng c\u00e1ch x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean c\u00e1c l\u1edbp hi\u1ec7n c\u00f3, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1edbp chuy\u00ean bi\u1ec7t v\u00e0 tinh t\u1ebf h\u01a1n, n\u00e2ng cao c\u1ea5u tr\u00fac t\u1ed5ng th\u1ec3 v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec m\u00e3 c\u1ee7a h\u1ecd.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a quy\u1ec1n th\u1eeba k\u1ebf v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>Kh\u00e1i ni\u1ec7m k\u1ebf th\u1eeba c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh, nh\u01b0ng n\u00f3 tr\u1edf n\u00ean n\u1ed5i b\u1eadt h\u01a1n v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng trong nh\u1eefng n\u0103m 1960 v\u00e0 1970. M\u1ed9t trong nh\u1eefng t\u00e0i li\u1ec7u tham kh\u1ea3o s\u1edbm nh\u1ea5t v\u1ec1 t\u00ednh k\u1ebf th\u1eeba c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong Simula, m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Ole-Johan Dahl v\u00e0 Kristen Nygaard v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 1960. Simula gi\u1edbi thi\u1ec7u kh\u00e1i ni\u1ec7m v\u1ec1 l\u1edbp v\u00e0 l\u1edbp con, \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho c\u00e1c ng\u00f4n ng\u1eef OOP hi\u1ec7n \u0111\u1ea1i.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 K\u1ebf th\u1eeba: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1<\/h2>\n<p>K\u1ebf th\u1eeba l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a OOP v\u00e0 \u0111\u00f3ng vai tr\u00f2 l\u00e0 m\u1ed9t trong b\u1ed1n tr\u1ee5 c\u1ed9t, c\u00f9ng v\u1edbi t\u00ednh \u0111\u00f3ng g\u00f3i, t\u00ednh tr\u1eebu t\u01b0\u1ee3ng v\u00e0 t\u00ednh \u0111a h\u00ecnh. N\u00f3 cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p c\u00e1c l\u1edbp, trong \u0111\u00f3 m\u1ed9t l\u1edbp con c\u00f3 th\u1ec3 k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a si\u00eau l\u1edbp, \u0111\u1ed3ng th\u1eddi c\u00f3 kh\u1ea3 n\u0103ng ghi \u0111\u00e8 ho\u1eb7c m\u1edf r\u1ed9ng ch\u00fang khi c\u1ea7n. C\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p n\u00e0y t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i m\u00e3, v\u00ec c\u00e1c t\u00ednh n\u0103ng chung c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1eadp trung v\u00e0o m\u1ed9t si\u00eau l\u1edbp v\u00e0 \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba b\u1edfi nhi\u1ec1u l\u1edbp con.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a t\u00ednh k\u1ebf th\u1eeba: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u00ednh k\u1ebf th\u1eeba<\/h2>\n<p>Khi m\u1ed9t l\u1edbp con k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha, n\u00f3 c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c th\u00e0nh vi\u00ean c\u00f4ng khai v\u00e0 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 c\u1ee7a l\u1edbp cha. C\u00e1c th\u00e0nh vi\u00ean public c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp b\u1eb1ng b\u1ea5t k\u1ef3 m\u00e3 n\u00e0o t\u01b0\u01a1ng t\u00e1c v\u1edbi l\u1edbp con, trong khi c\u00e1c th\u00e0nh vi\u00ean \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp b\u1edfi l\u1edbp con v\u00e0 c\u00e1c l\u1edbp con c\u1ee7a n\u00f3. T\u00ednh k\u1ebf th\u1eeba cho ph\u00e9p l\u1edbp con s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 t\u1eeb si\u00eau l\u1edbp, gi\u1ea3m s\u1ef1 d\u01b0 th\u1eeba v\u00e0 th\u00fac \u0111\u1ea9y t\u1ed5 ch\u1ee9c m\u00e3 hi\u1ec7u qu\u1ea3.<\/p>\n<p>C\u00fa ph\u00e1p chung \u0111\u1ec3 k\u1ebf th\u1eeba m\u1ed9t l\u1edbp trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c nhau nh\u01b0 sau:<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>tr\u0103n<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>Sao ch\u00e9p m\u00e3<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-python\" data-no-translation=\"\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Superclass<\/span>:\n    <span class=\"hljs-comment\"># Superclass members and methods<\/span>\n\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Subclass<\/span>(<span class=\"hljs-title class_ inherited__\">Superclass<\/span>):\n    <span class=\"hljs-comment\"># Subclass members and methods<\/span>\n<\/code><\/div><\/div><\/pre>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, <code data-no-translation=\"\">Subclass<\/code> \u0111ang k\u1ebf th\u1eeba t\u1eeb <code data-no-translation=\"\">Superclass<\/code>.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a k\u1ebf th\u1eeba<\/h2>\n<p>C\u00e1c t\u00ednh n\u0103ng v\u00e0 \u01b0u \u0111i\u1ec3m ch\u00ednh c\u1ee7a t\u00ednh k\u1ebf th\u1eeba trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i m\u00e3:<\/strong> T\u00ednh k\u1ebf th\u1eeba cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 t\u1eeb c\u00e1c l\u1edbp hi\u1ec7n c\u00f3, gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 th\u00fac \u0111\u1ea9y t\u1ed5 ch\u1ee9c m\u00e3 hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00ednh m\u00f4 \u0111un:<\/strong> V\u1edbi t\u00ednh k\u1ebf th\u1eeba, c\u00e1c l\u1edbp c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p, l\u00e0m cho m\u00e3 tr\u1edf n\u00ean m\u00f4 \u0111un h\u01a1n v\u00e0 d\u1ec5 qu\u1ea3n l\u00fd h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>S\u1ef1 \u0111\u01a1n gi\u1ea3n:<\/strong> K\u1ebf th\u1eeba \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c b\u1ea3o tr\u00ec m\u00e3 b\u1eb1ng c\u00e1ch t\u1eadp trung c\u00e1c ch\u1ee9c n\u0103ng chung trong si\u00eau l\u1edbp.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong> C\u00e1c l\u1edbp con c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c si\u00eau l\u1edbp c\u1ee7a ch\u00fang, cho ph\u00e9p chuy\u00ean m\u00f4n h\u00f3a v\u00e0 t\u00f9y ch\u1ec9nh.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110a h\u00ecnh:<\/strong> T\u00ednh k\u1ebf th\u1eeba, k\u1ebft h\u1ee3p v\u1edbi t\u00ednh \u0111a h\u00ecnh, cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a c\u00e1c l\u1edbp con kh\u00e1c nhau \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp cha c\u1ee7a ch\u00fang, th\u00fac \u0111\u1ea9y t\u00ednh linh ho\u1ea1t trong c\u01a1 s\u1edf m\u00e3.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i th\u1eeba k\u1ebf<\/h2>\n<p>K\u1ebf th\u1eeba c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00e1ch c\u00e1c l\u1edbp k\u1ebf th\u1eeba l\u1eabn nhau. C\u00e1c ki\u1ec3u th\u1eeba k\u1ebf ph\u1ed5 bi\u1ebfn l\u00e0:<\/p>\n<ol>\n<li>\n<p><strong>K\u1ebf th\u1eeba \u0111\u01a1n:<\/strong> M\u1ed9t l\u1edbp con ch\u1ec9 c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha. H\u1ea7u h\u1ebft c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u0111\u1ec1u h\u1ed7 tr\u1ee3 k\u1ebf th\u1eeba \u0111\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110a k\u1ebf th\u1eeba:<\/strong> M\u1ed9t l\u1edbp con c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u l\u1edbp cha. M\u1eb7c d\u00f9 m\u1ea1nh m\u1ebd nh\u01b0ng \u0111a k\u1ebf th\u1eeba c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 m\u01a1 h\u1ed3 v\u00e0 ph\u1ee9c t\u1ea1p.<\/p>\n<\/li>\n<li>\n<p><strong>K\u1ebf th\u1eeba \u0111a c\u1ea5p:<\/strong> M\u1ed9t l\u1edbp con c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp con kh\u00e1c, t\u1ea1o ra m\u1ed9t chu\u1ed7i k\u1ebf th\u1eeba.<\/p>\n<\/li>\n<li>\n<p><strong>K\u1ebf th\u1eeba ph\u00e2n c\u1ea5p:<\/strong> Nhi\u1ec1u l\u1edbp con k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha duy nh\u1ea5t.<\/p>\n<\/li>\n<li>\n<p><strong>K\u1ebf th\u1eeba lai:<\/strong> S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa k\u1ebf th\u1eeba \u0111a c\u1ea5p v\u00e0 \u0111a c\u1ea5p, cho ph\u00e9p m\u1ed9t l\u1edbp con k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u l\u1edbp, bao g\u1ed3m c\u1ea3 c\u00e1c l\u1edbp con.<\/p>\n<\/li>\n<\/ol>\n<p>\u0110\u00e2y l\u00e0 b\u1ea3ng t\u00f3m t\u1eaft c\u00e1c ki\u1ec3u k\u1ebf th\u1eeba kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i th\u1eeba k\u1ebf<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>K\u1ebf th\u1eeba \u0111\u01a1n<\/td>\n<td>L\u1edbp con k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha duy nh\u1ea5t.<\/td>\n<\/tr>\n<tr>\n<td>\u0110a k\u1ebf th\u1eeba<\/td>\n<td>L\u1edbp con k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u l\u1edbp cha.<\/td>\n<\/tr>\n<tr>\n<td>K\u1ebf th\u1eeba \u0111a c\u1ea5p<\/td>\n<td>L\u1edbp con k\u1ebf th\u1eeba t\u1eeb l\u1edbp con kh\u00e1c trong chu\u1ed7i.<\/td>\n<\/tr>\n<tr>\n<td>K\u1ebf th\u1eeba ph\u00e2n c\u1ea5p<\/td>\n<td>Nhi\u1ec1u l\u1edbp con k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp cha duy nh\u1ea5t.<\/td>\n<\/tr>\n<tr>\n<td>K\u1ebf th\u1eeba lai<\/td>\n<td>L\u1edbp con k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u l\u1edbp, bao g\u1ed3m c\u1ea3 l\u1edbp con.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng t\u00ednh k\u1ebf th\u1eeba, v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng t\u00ednh k\u1ebf th\u1eeba h\u1ee3p l\u00fd l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra m\u1ed9t c\u01a1 s\u1edf m\u00e3 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c t\u1ed1t v\u00e0 c\u00f3 th\u1ec3 b\u1ea3o tr\u00ec \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng kh\u00f4ng \u0111\u00fang c\u00e1ch ho\u1eb7c l\u1ea1m d\u1ee5ng quy\u1ec1n th\u1eeba k\u1ebf c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 nh\u1ea5t \u0111\u1ecbnh, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n<ol>\n<li>\n<p><strong>\u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p k\u1ebf th\u1eeba:<\/strong> M\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p k\u1ebf th\u1eeba s\u00e2u s\u1eafc v\u00e0 ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 kh\u00f3 hi\u1ec3u v\u00e0 kh\u00f3 duy tr\u00ec.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00e1i s\u1eed d\u1ee5ng m\u00e3 kh\u00f4ng ph\u00f9 h\u1ee3p:<\/strong> K\u1ebf th\u1eeba t\u1eeb m\u1ed9t si\u00eau l\u1edbp kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed1i quan h\u1ec7 \u201cis-a\u201d th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<\/li>\n<li>\n<p><strong>V\u1ea5n \u0111\u1ec1 kim c\u01b0\u01a1ng (\u0110a k\u1ebf th\u1eeba):<\/strong> Trong c\u00e1c ng\u00f4n ng\u1eef h\u1ed7 tr\u1ee3 \u0111a k\u1ebf th\u1eeba, vi\u1ec7c k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u si\u00eau l\u1edbp b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ch\u1ed3ng ch\u00e9o c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 m\u01a1 h\u1ed3.<\/p>\n<\/li>\n<\/ol>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c gi\u1ea3i ph\u00e1p sau:<\/p>\n<ol>\n<li>\n<p><strong>Th\u00e0nh ph\u1ea7n \u01b0a th\u00edch h\u01a1n k\u1ebf th\u1eeba:<\/strong> Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n khi s\u1eed d\u1ee5ng th\u00e0nh ph\u1ea7n, trong \u0111\u00f3 m\u1ed9t l\u1edbp ch\u1ee9a c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a c\u00e1c l\u1edbp kh\u00e1c thay v\u00ec k\u1ebf th\u1eeba t\u1eeb ch\u00fang.<\/p>\n<\/li>\n<li>\n<p><strong>Tr\u00e1nh ph\u00e2n c\u1ea5p s\u00e2u:<\/strong> Gi\u1eef h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p th\u1eeba k\u1ebf \u0111\u01a1n gi\u1ea3n v\u00e0 n\u00f4ng c\u1ea1n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u1ecdc v\u00e0 b\u1ea3o tr\u00ec m\u00e3.<\/p>\n<\/li>\n<li>\n<p><strong>K\u1ebf th\u1eeba d\u1ef1a tr\u00ean giao di\u1ec7n:<\/strong> Vi\u1ec7c tri\u1ec3n khai c\u00e1c giao di\u1ec7n ho\u1eb7c c\u00e1c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng c\u00f3 th\u1ec3 gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c V\u1ea5n \u0111\u1ec1 Kim c\u01b0\u01a1ng trong khi v\u1eabn \u0111\u1ea3m b\u1ea3o h\u00e0nh vi nh\u1ea5t qu\u00e1n.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 nh\u1eefng so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>K\u1ebf th\u1eeba th\u01b0\u1eddng \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi hai kh\u00e1i ni\u1ec7m li\u00ean quan kh\u00e1c: th\u00e0nh ph\u1ea7n v\u00e0 tr\u1eebu t\u01b0\u1ee3ng h\u00f3a.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>Di s\u1ea3n<\/th>\n<th>Th\u00e0nh ph\u1ea7n<\/th>\n<th>Tr\u1eebu t\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ed1i quan h\u1ec7<\/td>\n<td>M\u1ed1i quan h\u1ec7 \u201cIs-a\u201d gi\u1eefa c\u00e1c l\u1edbp<\/td>\n<td>M\u1ed1i quan h\u1ec7 \u201chas-a\u201d gi\u1eefa c\u00e1c l\u1edbp<\/td>\n<td>Bi\u1ec3u di\u1ec5n c\u1ea5p cao c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng<\/td>\n<\/tr>\n<tr>\n<td>T\u00e1i s\u1eed d\u1ee5ng m\u00e3<\/td>\n<td>K\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi<\/td>\n<td>T\u00e1i s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng<\/td>\n<td>\u1ea8n chi ti\u1ebft tri\u1ec3n khai v\u1edbi ng\u01b0\u1eddi d\u00f9ng<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed5 ch\u1ee9c ph\u00e2n c\u1ea5p<\/td>\n<td>Th\u00fac \u0111\u1ea9y c\u1ea5u tr\u00fac l\u1edbp ph\u00e2n c\u1ea5p<\/td>\n<td>Khuy\u1ebfn kh\u00edch thi\u1ebft k\u1ebf m\u00f4-\u0111un<\/td>\n<td>\u0110\u01a1n gi\u1ea3n h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch chia nh\u1ecf ch\u00fang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn th\u1eeba k\u1ebf<\/h2>\n<p>Khi c\u00e1c ng\u00f4n ng\u1eef v\u00e0 c\u00f4ng ngh\u1ec7 l\u1eadp tr\u00ecnh ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, t\u00ednh k\u1ebf th\u1eeba v\u1eabn l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u1eefng ti\u1ebfn b\u1ed9 trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 t\u1eadp trung v\u00e0o vi\u1ec7c tinh ch\u1ec9nh c\u00e1c c\u01a1 ch\u1ebf k\u1ebf th\u1eeba v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c th\u00e1ch th\u1ee9c li\u00ean quan \u0111\u1ebfn \u0111a k\u1ebf th\u1eeba.<\/p>\n<h2>C\u00e1ch m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft v\u1edbi t\u00ednh k\u1ebf th\u1eeba<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong giao ti\u1ebfp m\u1ea1ng b\u1eb1ng c\u00e1ch \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7. Trong khi kh\u00e1i ni\u1ec7m k\u1ebf th\u1eeba ch\u1ee7 y\u1ebfu li\u00ean quan \u0111\u1ebfn OOP, b\u1ea3n th\u00e2n c\u00e1c m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u00ednh k\u1ebf th\u1eeba \u0111\u1ec3 t\u1ed5 ch\u1ee9c c\u00e1c lo\u1ea1i proxy kh\u00e1c nhau v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a ch\u00fang.<\/p>\n<p>V\u00ed d\u1ee5: nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy (oneproxy.pro) c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u00ednh k\u1ebf th\u1eeba \u0111\u1ec3 qu\u1ea3n l\u00fd nhi\u1ec1u lo\u1ea1i m\u00e1y ch\u1ee7 proxy kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 proxy HTTP, proxy SOCKS ho\u1eb7c proxy d\u00e2n d\u1ee5ng. B\u1eb1ng c\u00e1ch tri\u1ec3n khai m\u1ed9t si\u00eau l\u1edbp th\u1ec3 hi\u1ec7n c\u00e1c t\u00ednh n\u0103ng v\u00e0 h\u00e0nh vi chung c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i proxy, nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 r\u00fat ra c\u00e1c l\u1edbp con chuy\u00ean bi\u1ec7t cho t\u1eebng lo\u1ea1i proxy, k\u1ebf th\u1eeba v\u00e0 t\u00f9y ch\u1ec9nh ch\u1ee9c n\u0103ng n\u1ebfu c\u1ea7n.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 k\u1ebf th\u1eeba v\u00e0 l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c t\u00e0i nguy\u00ean sau h\u1eefu \u00edch:<\/p>\n<ol>\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/java\/IandI\/subclasses.html\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn k\u1ebf th\u1eeba Java \u2013 Oracle<\/a><\/li>\n<li><a href=\"https:\/\/realpython.com\/inheritance-composition-python\/\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn k\u1ebf th\u1eeba Python \u2013 Python th\u1ef1c<\/a><\/li>\n<li><a href=\"https:\/\/www.geeksforgeeks.org\/inheritance-in-c\/\" target=\"_new\" rel=\"noopener nofollow\">K\u1ebf th\u1eeba C++ \u2013 GeeksforGeeks<\/a><\/li>\n<li><a href=\"https:\/\/www.khanacademy.org\/computing\/computer-programming\" target=\"_new\" rel=\"noopener nofollow\">T\u00ecm hi\u1ec3u l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \u2013 Khan Academy<\/a><\/li>\n<\/ol>","protected":false},"featured_media":468628,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477598","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Inheritance: Unraveling the Foundations of Object-Oriented Programming<\/mark>","faq_items":[{"question":"What is inheritance in object-oriented programming?","answer":"<p>Inheritance in object-oriented programming is a fundamental concept that allows a class (subclass) to inherit properties and behaviors from another class (superclass). It facilitates code reuse, enhances maintainability, and promotes a hierarchical organization of classes.<\/p>"},{"question":"How does inheritance work internally?","answer":"<p>When a subclass inherits from a superclass, it gains access to the public and protected members of the superclass. This enables the subclass to reuse code from the superclass, reducing redundancy and promoting efficient code organization.<\/p>"},{"question":"What are the key features of inheritance?","answer":"<p>The key features of inheritance include code reusability, modularity, simplicity, extensibility, and polymorphism. Inheritance allows developers to create a hierarchy of classes, making the code more organized and easier to maintain.<\/p>"},{"question":"What are the types of inheritance?","answer":"<p>There are several types of inheritance:<\/p><ol><li>Single Inheritance: A subclass inherits from a single superclass.<\/li><li>Multiple Inheritance: A subclass inherits from multiple superclasses.<\/li><li>Multilevel Inheritance: A subclass inherits from another subclass in a chain.<\/li><li>Hierarchical Inheritance: Multiple subclasses inherit from a single superclass.<\/li><li>Hybrid Inheritance: A subclass inherits from multiple classes, including subclasses.<\/li><\/ol>"},{"question":"How can inheritance be used effectively?","answer":"<p>To use inheritance effectively, developers should favor composition over inheritance in certain cases, avoid deep hierarchies, and use interface-based inheritance to address the Diamond Problem in multiple inheritance.<\/p>"},{"question":"What are the potential problems associated with inheritance?","answer":"<p>Improper use or overuse of inheritance can lead to problems such as complex inheritance hierarchies and inappropriate code reuse. The Diamond Problem can also arise in languages that support multiple inheritance.<\/p>"},{"question":"How can proxy servers be associated with inheritance?","answer":"<p>Proxy server providers, like OneProxy, can use inheritance to manage different types of proxy servers. By creating a superclass with common proxy functionalities and deriving specialized subclasses for each proxy type, providers can enhance performance and customization.<\/p>"},{"question":"What are the future perspectives of inheritance?","answer":"<p>As programming languages evolve, inheritance will remain a vital concept in object-oriented programming. Future advancements may focus on refining inheritance mechanisms and addressing challenges related to multiple inheritance.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477598\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468628"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}