{"id":709,"date":"2026-03-26T22:17:01","date_gmt":"2026-03-26T22:17:01","guid":{"rendered":"https:\/\/www.go-minder.com\/vn\/reverse-engineering-uml-class-diagram-guide\/"},"modified":"2026-03-26T22:17:01","modified_gmt":"2026-03-26T22:17:01","slug":"reverse-engineering-uml-class-diagram-guide","status":"publish","type":"post","link":"https:\/\/www.go-minder.com\/vn\/reverse-engineering-uml-class-diagram-guide\/","title":{"rendered":"T\u1eeb M\u00e3 ngu\u1ed3n \u0111\u1ebfn S\u01a1 \u0111\u1ed3 L\u1edbp: H\u01b0\u1edbng d\u1eabn cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1ec1 K\u1ef9 thu\u1eadt \u0110\u1ea3o ng\u01b0\u1ee3c UML"},"content":{"rendered":"

L\u00e0m vi\u1ec7c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 th\u01b0\u1eddng gi\u1ed1ng nh\u01b0 vi\u1ec7c \u0111i trong m\u1ed9t m\u00ea cung kh\u00f4ng c\u00f3 b\u1ea3n \u0111\u1ed3. B\u1ea1n c\u00f3 nh\u1eefng d\u00f2ng m\u00e3, nh\u01b0ng vi\u1ec7c hi\u1ec3u c\u1ea5u tr\u00fac n\u1ec1n t\u1ea3ng c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 \u0111\u1ea7y th\u00e1ch th\u1ee9c. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac k\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c UML<\/strong>\u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. N\u00f3 bi\u1ebfn \u0111\u1ed5i m\u00e3 th\u00f4 th\u00e0nh c\u00e1c bi\u1ec3u di\u1ec5n tr\u1ef1c quan, c\u1ee5 th\u1ec3 l\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 l\u1edbp UML<\/strong>, gi\u00fap logic ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 d\u1ec5 hi\u1ec3u.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd d\u1eabn d\u1eaft b\u1ea1n qua quy tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i m\u00e3 ng\u01b0\u1ee3c l\u1ea1i th\u00e0nh c\u00e1c s\u01a1 \u0111\u1ed3 c\u00f3 c\u1ea5u tr\u00fac. Ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c c\u01a1 ch\u1ebf, c\u00e1c m\u1eabu h\u00ecnh v\u00e0 c\u00e1c b\u01b0\u1edbc th\u1ef1c ti\u1ec5n li\u00ean quan. \u0110\u1ebfn cu\u1ed1i, b\u1ea1n s\u1ebd hi\u1ec3u c\u00e1ch tr\u1ef1c quan h\u00f3a c\u00e1c c\u1ea5u tr\u00fac h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u1ea7n d\u1ef1a v\u00e0o ph\u1ecfng \u0111o\u00e1n. H\u00e3y c\u00f9ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft.<\/p>\n

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\"Charcoal<\/figure>\n<\/div>\n

K\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c trong ng\u1eef c\u1ea3nh UML l\u00e0 g\u00ec? \ud83e\udd14<\/h2>\n

K\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c trong ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m l\u00e0 qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. Khi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho Ng\u00f4n ng\u1eef M\u00f4 h\u00ecnh h\u00f3a Th\u1ed1ng nh\u1ea5t (UML)<\/strong>, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 suy ra m\u1ed9t m\u00f4 h\u00ecnh t\u1eeb m\u00e3 ngu\u1ed3n. Thay v\u00ec vi\u1ebft m\u00e3 tr\u01b0\u1edbc v\u00e0 v\u1ebd s\u01a1 \u0111\u1ed3 sau (k\u1ef9 thu\u1eadt thu\u1eadn), b\u1ea1n b\u1eaft \u0111\u1ea7u t\u1eeb ph\u1ea7n th\u1ef1c thi v\u00e0 tr\u00edch xu\u1ea5t thi\u1ebft k\u1ebf.<\/p>\n

T\u1ea1i sao \u0111i\u1ec1u n\u00e0y l\u1ea1i c\u1ea7n thi\u1ebft? Th\u01b0\u1eddng th\u00ec t\u00e0i li\u1ec7u b\u1ecb l\u1ea1c h\u1eadu so v\u1edbi m\u00e3. C\u00e1c nh\u00f3m ph\u00e1t tri\u1ec3n m\u1edf r\u1ed9ng, t\u00ednh n\u0103ng thay \u0111\u1ed5i v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 g\u1ed1c tr\u1edf n\u00ean l\u1ed7i th\u1eddi. K\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c kh\u00f4i ph\u1ee5c m\u1ed1i li\u00ean k\u1ebft gi\u1eefa ph\u1ea7n th\u1ef1c thi v\u00e0 ph\u1ea7n thi\u1ebft k\u1ebf.<\/p>\n

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  • S\u1ef1 r\u00f5 r\u00e0ng:<\/strong>C\u00e1c s\u01a1 \u0111\u1ed3 tr\u1ef1c quan gi\u1ea3i th\u00edch m\u1ed1i quan h\u1ec7 nhanh h\u01a1n v\u0103n b\u1ea3n.<\/li>\n
  • B\u1ea3o tr\u00ec:<\/strong>Hi\u1ec3u r\u00f5 c\u00e1c ph\u1ee5 thu\u1ed9c gi\u00fap \u00edch cho vi\u1ec7c t\u00e1i c\u1ea5u tr\u00fac.<\/li>\n
  • Ti\u1ebfp nh\u1eadn nh\u00e2n s\u1ef1 m\u1edbi:<\/strong>C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi n\u1eafm b\u1eaft ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng nhanh h\u01a1n.<\/li>\n
  • T\u00e0i li\u1ec7u:<\/strong>T\u1ea1o ra m\u1ed9t b\u1ea3n ghi c\u1eadp nh\u1eadt v\u1ec1 tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i.<\/li>\n<\/ul>\n

    C\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i: Hi\u1ec3u c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng \ud83e\uddf1<\/h2>\n

    Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o quy tr\u00ecnh, b\u1ea1n ph\u1ea3i hi\u1ec3u nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o t\u1ea1o n\u00ean m\u1ed9t s\u01a1 \u0111\u1ed3 l\u1edbp<\/strong>. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y bi\u1ec3u di\u1ec5n c\u1ea5u tr\u00fac t\u0129nh c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng. M\u1ecdi y\u1ebfu t\u1ed1 trong m\u00e3 \u0111\u1ec1u c\u00f3 m\u1ed9t bi\u1ec3u di\u1ec5n t\u01b0\u01a1ng \u1ee9ng trong m\u00f4 h\u00ecnh.<\/p>\n

    1. L\u1edbp v\u00e0 \u0110\u1ed1i t\u01b0\u1ee3ng<\/h3>\n

    M\u1ed9t l\u1edbp l\u00e0 b\u1ea3n thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. Trong k\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c, b\u1ea1n x\u00e1c \u0111\u1ecbnh c\u00e1c l\u1edbp b\u1eb1ng c\u00e1ch t\u00ecm ki\u1ebfm c\u00e1c \u0111\u1ecbnh ngh\u0129a ki\u1ec3u. Trong nhi\u1ec1u ng\u00f4n ng\u1eef, \u0111\u00e2y l\u00e0 c\u00e1c t\u1eeb kh\u00f3a r\u00f5 r\u00e0ng. Trong nh\u1eefng ng\u00f4n ng\u1eef kh\u00e1c, ch\u00fang \u0111\u01b0\u1ee3c suy ra t\u1eeb c\u00e1c m\u1eabu s\u1eed d\u1ee5ng.<\/p>\n

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    • T\u00ean l\u1edbp:<\/strong>Th\u01b0\u1eddng kh\u1edbp v\u1edbi t\u00ean t\u1ec7p ho\u1eb7c \u0111\u1ecbnh danh ch\u00ednh.<\/li>\n
    • Thu\u1ed9c t\u00ednh:<\/strong>C\u00e1c bi\u1ebfn \u0111\u01b0\u1ee3c khai b\u00e1o trong ph\u1ea1m vi c\u1ee7a l\u1edbp.<\/li>\n
    • Ph\u01b0\u01a1ng th\u1ee9c:<\/strong> C\u00e1c h\u00e0m ho\u1eb7c th\u1ee7 t\u1ee5c thu\u1ed9c v\u1ec1 l\u1edbp.<\/li>\n<\/ul>\n

      2. Kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0 c\u00e1c b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n

      Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh vi\u00ean c\u1ee7a m\u1ed9t l\u1edbp \u0111\u1ec1u c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c \u1edf m\u1ecdi n\u01a1i. UML s\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3 \u0111\u1ec3 bi\u1ec3u th\u1ecb kh\u1ea3 n\u0103ng truy c\u1eadp. Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng \u0111i\u1ec1u n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 v\u1ebd bi\u1ec3u \u0111\u1ed3 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n\n\n\n\n\n
      K\u00fd hi\u1ec7u<\/th>\nKh\u1ea3 n\u0103ng truy c\u1eadp<\/th>\nM\u00e3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/th>\n<\/tr>\n<\/thead>\n
      +<\/strong><\/td>\nC\u00f4ng khai<\/td>\npublic \/ m\u1eb7c \u0111\u1ecbnh<\/td>\n<\/tr>\n
      \u2013<\/strong><\/td>\nRi\u00eang t\u01b0<\/td>\nprivate<\/td>\n<\/tr>\n
      #<\/strong><\/td>\n\u0110\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/td>\nprotected<\/td>\n<\/tr>\n
      ~<\/strong><\/td>\nG\u00f3i\/B\u1ea1n<\/td>\ninternal \/ package-private<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      3. Ki\u1ec3u v\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u<\/h3>\n

      C\u00e1c thu\u1ed9c t\u00ednh c\u00f3 ki\u1ec3u. Trong bi\u1ec3u \u0111\u1ed3, \u0111i\u1ec1u n\u00e0y xu\u1ea5t hi\u1ec7n b\u00ean c\u1ea1nh t\u00ean thu\u1ed9c t\u00ednh. Vi\u1ec7c ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c ki\u1ec3u c\u01a1 b\u1ea3n v\u00e0 c\u00e1c ki\u1ec3u tham chi\u1ebfu l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u lu\u1ed3ng d\u1eef li\u1ec7u.<\/p>\n

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      • Ki\u1ec3u c\u01a1 b\u1ea3n:<\/strong> int, boolean, string. C\u00e1c gi\u00e1 tr\u1ecb \u0111\u01a1n gi\u1ea3n.<\/li>\n
      • Ki\u1ec3u tham chi\u1ebfu:<\/strong> \u0110\u1ed1i t\u01b0\u1ee3ng, giao di\u1ec7n ho\u1eb7c c\u00e1c l\u1edbp kh\u00e1c. Nh\u1eefng th\u1ee9 n\u00e0y t\u1ea1o ra c\u00e1c k\u1ebft n\u1ed1i.<\/li>\n<\/ul>\n

        Quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc \ud83d\ude80<\/h2>\n

        Chuy\u1ec3n \u0111\u1ed5i m\u00e3 th\u00e0nh bi\u1ec3u \u0111\u1ed3 kh\u00f4ng di\u1ec5n ra t\u1ee9c th\u00ec. N\u00f3 \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 h\u1ec7 th\u1ed1ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 lu\u1ed3ng logic \u0111\u1ec3 th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch th\u1ee7 c\u00f4ng ho\u1eb7c th\u00f4ng qua c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng.<\/p>\n

        B\u01b0\u1edbc 1: Ki\u1ec3m k\u00ea v\u00e0 x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi \ud83d\udccb<\/h3>\n

        B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c ranh gi\u1edbi. B\u1ea1n \u0111ang ph\u00e2n t\u00edch m\u1ed9t m\u00f4-\u0111un \u0111\u01a1n l\u1ebb, m\u1ed9t th\u01b0 vi\u1ec7n, hay to\u00e0n b\u1ed9 \u1ee9ng d\u1ee5ng? Vi\u1ec7c x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi gi\u00fap ng\u0103n bi\u1ec3u \u0111\u1ed3 tr\u1edf n\u00ean qu\u00e1 l\u1edbn \u0111\u1ec3 \u0111\u1ecdc.<\/p>\n

          \n
        • Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m v\u00e0o (c\u00e1c h\u00e0m ch\u00ednh, c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n).<\/li>\n
        • X\u00e1c \u0111\u1ecbnh c\u00e1c mi\u1ec1n c\u1ed1t l\u00f5i (v\u00ed d\u1ee5: Ng\u01b0\u1eddi d\u00f9ng, \u0110\u01a1n h\u00e0ng, S\u1ea3n ph\u1ea9m).<\/li>\n
        • Lo\u1ea1i b\u1ecf c\u00e1c ph\u1ee5 thu\u1ed9c b\u00ean ngo\u00e0i khi c\u00f3 th\u1ec3 \u0111\u1ec3 gi\u1ea3m nhi\u1ec5u.<\/li>\n<\/ul>\n

          B\u01b0\u1edbc 2: Tr\u00edch xu\u1ea5t l\u1edbp \ud83e\udde9<\/h3>\n

          \u0110\u00e2y l\u00e0 nhi\u1ec7m v\u1ee5 c\u1ed1t l\u00f5i. B\u1ea1n qu\u00e9t c\u01a1 s\u1edf m\u00e3 \u0111\u1ec3 t\u00ecm c\u00e1c \u0111\u1ecbnh ngh\u0129a.<\/p>\n

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          • X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ecbnh ngh\u0129a:<\/strong> T\u00ecm ki\u1ebfm class<\/code>, interface<\/code>, ho\u1eb7c struct<\/code> t\u1eeb kh\u00f3a.<\/li>\n
          • Tr\u00edch xu\u1ea5t c\u00e1c th\u00e0nh vi\u00ean:<\/strong> R\u00fat ra t\u1ea5t c\u1ea3 c\u00e1c bi\u1ebfn v\u00e0 ph\u01b0\u01a1ng th\u1ee9c b\u00ean trong c\u00e1c \u0111\u1ecbnh ngh\u0129a n\u00e0y.<\/li>\n
          • Ph\u00e2n lo\u1ea1i:<\/strong> T\u00e1ch bi\u1ec7t c\u00e1c th\u00e0nh vi\u00ean t\u0129nh kh\u1ecfi c\u00e1c th\u00e0nh vi\u00ean th\u1ec3 hi\u1ec7n.<\/li>\n<\/ul>\n

            B\u01b0\u1edbc 3: L\u1eadp b\u1ea3n \u0111\u1ed3 quan h\u1ec7 \ud83d\udd17<\/h3>\n

            C\u00e1c l\u1edbp hi\u1ebfm khi t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp. Ch\u00fang t\u01b0\u01a1ng t\u00e1c. B\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh c\u00e1ch m\u1ed9t l\u1edbp s\u1eed d\u1ee5ng l\u1edbp kh\u00e1c.<\/p>\n

              \n
            • Kh\u1edfi t\u1ea1o:<\/strong> N\u1ebfu L\u1edbp A t\u1ea1o m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a L\u1edbp B, th\u00ec c\u00f3 m\u1ed9t li\u00ean k\u1ebft.<\/li>\n
            • Tham s\u1ed1 ph\u01b0\u01a1ng th\u1ee9c:<\/strong> N\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c nh\u1eadn L\u1edbp C l\u00e0m tham s\u1ed1, th\u00ec c\u00f3 m\u1ed9t s\u1ef1 ph\u1ee5 thu\u1ed9c.<\/li>\n
            • Ki\u1ec3u tr\u1ea3 v\u1ec1:<\/strong> N\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c tr\u1ea3 v\u1ec1 L\u1edbp D, th\u00ec c\u00f3 m\u1ed9t m\u1ed1i quan h\u1ec7.<\/li>\n
            • K\u1ebf th\u1eeba:<\/strong> T\u00ecm ki\u1ebfm extends<\/code> ho\u1eb7c implements<\/code> t\u1eeb kh\u00f3a.<\/li>\n<\/ul>\n

              B\u01b0\u1edbc 4: X\u00e1c th\u1ef1c v\u00e0 D\u1ecdn d\u1eb9p \ud83e\uddf9<\/h3>\n

              Vi\u1ec7c tr\u00edch xu\u1ea5t ban \u0111\u1ea7u th\u01b0\u1eddng ch\u1ee9a nhi\u1ec1u nhi\u1ec5u. B\u1ea1n c\u1ea7n tinh ch\u1ec9nh m\u00f4 h\u00ecnh.<\/p>\n

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              • Lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft tri\u1ec3n khai kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea5u tr\u00fac.<\/li>\n
              • Ki\u1ec3m tra c\u00e1c ph\u1ee5 thu\u1ed9c v\u00f2ng l\u1eb7p c\u00f3 th\u1ec3 ch\u1ec9 ra l\u1ed7i thi\u1ebft k\u1ebf.<\/li>\n
              • \u0110\u1ea3m b\u1ea3o c\u00e1c quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean nh\u1ea5t qu\u00e1n tr\u00ean to\u00e0n b\u1ed9 s\u01a1 \u0111\u1ed3.<\/li>\n<\/ul>\n

                Kh\u00e1m ph\u00e1 s\u00e2u v\u1ec1 c\u00e1c m\u1ed1i quan h\u1ec7 \ud83d\udd0d<\/h2>\n

                Hi\u1ec3u r\u00f5 c\u00e1c m\u1ed1i quan h\u1ec7 l\u00e0 ph\u1ea7n quan tr\u1ecdng nh\u1ea5t c\u1ee7a vi\u1ec7c k\u1ef9 thu\u1eadt ng\u01b0\u1ee3c UML. M\u1ed9t s\u01a1 \u0111\u1ed3 l\u1edbp kh\u00f4ng c\u00f3 m\u1ed1i quan h\u1ec7 ch\u1ec9 l\u00e0 m\u1ed9t danh s\u00e1ch c\u00e1c l\u1edbp. C\u00e1c k\u1ebft n\u1ed1i k\u1ec3 n\u00ean c\u00e2u chuy\u1ec7n c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

                1. K\u1ebf th\u1eeba (T\u1ed5ng qu\u00e1t h\u00f3a) \ud83c\udf33<\/h3>\n

                \u0110i\u1ec1u n\u00e0y bi\u1ec3u th\u1ecb m\u1ed1i quan h\u1ec7 \u201cl\u00e0 m\u1ed9t\u201d. M\u1ed9t l\u1edbp c\u1ee5 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp t\u1ed5ng qu\u00e1t h\u01a1n. Trong m\u00e3 ngu\u1ed3n, \u0111\u00e2y l\u00e0 c\u00fa ph\u00e1p r\u00f5 r\u00e0ng.<\/p>\n

                  \n
                • H\u00ecnh \u1ea3nh:<\/strong> M\u1ed9t \u0111\u01b0\u1eddng li\u1ec1n v\u1edbi m\u0169i t\u00ean tam gi\u00e1c r\u1ed7ng ch\u1ec9 v\u1ec1 ph\u00eda l\u1edbp cha.<\/li>\n
                • M\u00e3 ngu\u1ed3n:<\/strong> class Child extends Parent<\/code>.<\/li>\n
                • H\u1ec7 qu\u1ea3:<\/strong> L\u1edbp con s\u1edf h\u1eefu t\u1ea5t c\u1ea3 c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a l\u1edbp cha.<\/li>\n<\/ul>\n

                  2. Li\u00ean k\u1ebft \ud83d\udcbc<\/h3>\n

                  Li\u00ean k\u1ebft l\u00e0 m\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i. N\u00f3 th\u01b0\u1eddng l\u00e0 m\u1ed1i quan h\u1ec7 m\u1eb7c \u0111\u1ecbnh khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng tham chi\u1ebfu \u0111\u1ebfn m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c.<\/p>\n

                    \n
                  • H\u00ecnh \u1ea3nh:<\/strong> M\u1ed9t \u0111\u01b0\u1eddng li\u1ec1n n\u1ed1i hai l\u1edbp.<\/li>\n
                  • M\u00e3 ngu\u1ed3n:<\/strong> M\u1ed9t tr\u01b0\u1eddng trong m\u1ed9t l\u1edbp ch\u1ee9a tham chi\u1ebfu \u0111\u1ebfn m\u1ed9t l\u1edbp kh\u00e1c.<\/li>\n
                  • S\u1ed1 l\u01b0\u1ee3ng:<\/strong> L\u00e0 m\u1ed9t-m\u1ed9t? M\u1ed9t-nhi\u1ec1u? Nhi\u1ec1u-nhi\u1ec1u?<\/li>\n<\/ul>\n

                    3. T\u1eadp h\u1ee3p so v\u1edbi T\u1ed5 h\u1ee3p \ud83e\uddf1<\/h3>\n

                    \u0110\u00e2y l\u00e0 c\u00e1c lo\u1ea1i li\u00ean k\u1ebft c\u1ee5 th\u1ec3 li\u00ean quan \u0111\u1ebfn quy\u1ec1n s\u1edf h\u1eefu v\u00e0 v\u00f2ng \u0111\u1eddi.<\/p>\n\n\n\n\n\n\n
                    Lo\u1ea1i<\/th>\n\u00dd ngh\u0129a<\/th>\nK\u00fd hi\u1ec7u h\u00ecnh \u1ea3nh<\/th>\nV\u00ed d\u1ee5 m\u00e3 ngu\u1ed3n<\/th>\n<\/tr>\n<\/thead>\n
                    S\u1ef1 t\u1eadp h\u1ee3p<\/strong><\/td>\nM\u1ed1i quan h\u1ec7 To\u00e0n th\u1ec3 – B\u1ed9 ph\u1eadn. C\u00e1c b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp.<\/td>\n\u0110\u01b0\u1eddng k\u1ebb c\u00f3 h\u00ecnh thoi r\u1ed7ng<\/td>\nL\u1edbp A c\u00f3 m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a L\u1edbp B \u0111\u01b0\u1ee3c truy\u1ec1n v\u00e0o.<\/td>\n<\/tr>\n
                    S\u1ef1 c\u1ea5u th\u00e0nh<\/strong><\/td>\nQuy\u1ec1n s\u1edf h\u1eefu m\u1ea1nh. B\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i n\u1ebfu kh\u00f4ng c\u00f3 To\u00e0n th\u1ec3.<\/td>\n\u0110\u01b0\u1eddng k\u1ebb c\u00f3 h\u00ecnh thoi \u0111\u1eb7c<\/td>\nL\u1edbp A t\u1ea1o ra v\u00e0 h\u1ee7y b\u1ecf L\u1edbp B b\u00ean trong.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    4. S\u1ef1 ph\u1ee5 thu\u1ed9c \ud83d\udcc9<\/h3>\n

                    S\u1ef1 ph\u1ee5 thu\u1ed9c l\u00e0 m\u1ed9t m\u1ed1i quan h\u1ec7 y\u1ebfu h\u01a1n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 nh\u1eefng thay \u0111\u1ed5i trong m\u1ed9t l\u1edbp c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1edbp kia, nh\u01b0ng ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u0129nh vi\u1ec5n.<\/p>\n

                      \n
                    • H\u00ecnh \u1ea3nh:<\/strong>M\u1ed9t \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t c\u00f3 m\u0169i t\u00ean m\u1edf.<\/li>\n
                    • M\u00e3:<\/strong>Tham s\u1ed1 ph\u01b0\u01a1ng th\u1ee9c, bi\u1ebfn c\u1ee5c b\u1ed9, ho\u1eb7c l\u1eddi g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c t\u0129nh.<\/li>\n
                    • C\u00e1ch s\u1eed d\u1ee5ng:<\/strong>L\u1edbp A s\u1eed d\u1ee5ng L\u1edbp B t\u1ea1m th\u1eddi \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t t\u00e1c v\u1ee5.<\/li>\n<\/ul>\n

                      X\u1eed l\u00fd c\u00e1c t\u00ecnh hu\u1ed1ng ph\u1ee9c t\u1ea1p \ud83c\udfd7\ufe0f<\/h2>\n

                      C\u01a1 s\u1edf m\u00e3 trong th\u1ef1c t\u1ebf th\u01b0\u1eddng l\u1ed9n x\u1ed9n. Ch\u00fang ch\u1ee9a c\u00e1c m\u1eabu m\u00e3 l\u00e0m ph\u1ee9c t\u1ea1p qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch ng\u01b0\u1ee3c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch x\u1eed l\u00fd c\u00e1c th\u00e1ch th\u1ee9c ph\u1ed5 bi\u1ebfn.<\/p>\n

                      1. Giao di\u1ec7n v\u00e0 L\u1edbp tr\u1eebu t\u01b0\u1ee3ng \ud83d\udd78\ufe0f<\/h3>\n

                      Nh\u1eefng th\u1ee9 n\u00e0y \u0111\u1ecbnh ngh\u0129a h\u1ee3p \u0111\u1ed3ng thay v\u00ec c\u00e1ch th\u1ef1c hi\u1ec7n. Trong ph\u00e2n t\u00edch ng\u01b0\u1ee3c, r\u1ea5t d\u1ec5 nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1ch th\u1ef1c hi\u1ec7n v\u00e0 giao di\u1ec7n.<\/p>\n

                        \n
                      • Ki\u1ec3m tra xem c\u00f3 t\u1eeb kh\u00f3a interface<\/code> ho\u1eb7c c\u00e1c \u0111\u1ecbnh ngh\u0129a ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng.<\/li>\n
                      • \u0110\u00e1nh d\u1ea5u ch\u00fang r\u00f5 r\u00e0ng trong s\u01a1 \u0111\u1ed3 (th\u01b0\u1eddng v\u1edbi k\u00fd hi\u1ec7u <<interface>>).<\/li>\n
                      • L\u01b0u \u00fd r\u1eb1ng nhi\u1ec1u l\u1edbp c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00f9ng m\u1ed9t giao di\u1ec7n, t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m h\u1ed9i t\u1ee5.<\/li>\n<\/ul>\n

                        2. Ki\u1ec3u t\u1ed5ng qu\u00e1t v\u00e0 M\u1eabu \ud83d\udce6<\/h3>\n

                        C\u00e1c ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng ki\u1ec3u t\u1ed5ng qu\u00e1t \u0111\u1ec3 t\u1ea1o ra c\u00e1c l\u1edbp linh ho\u1ea1t. M\u1ed9t List<String><\/code> kh\u00e1c v\u1edbi m\u1ed9t List<Integer><\/code>.<\/p>\n

                          \n
                        • \u0110\u1ed1i v\u1edbi c\u00e1c bi\u1ec3u \u0111\u1ed3 UML, b\u1ea1n th\u01b0\u1eddng \u0111\u01a1n gi\u1ea3n h\u00f3a \u0111i\u1ec1u n\u00e0y th\u00e0nh ki\u1ec3u th\u00f4 (v\u00ed d\u1ee5, ch\u1ec9 “List<\/code>).<\/li>\n
                        • Th\u00eam ghi ch\u00fa ho\u1eb7c bi\u1ec7t danh \u0111\u1ec3 ch\u1ec9 ra c\u00e1c r\u00e0ng bu\u1ed9c ki\u1ec3u c\u1ee5 th\u1ec3 n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n
                        • \u0110\u1eebng l\u00e0m r\u1ed1i bi\u1ec3u \u0111\u1ed3 b\u1eb1ng c\u00e1ch th\u00eam m\u1ecdi tham s\u1ed1 t\u1ed5ng qu\u00e1t, tr\u1eeb khi ch\u00fang th\u1ef1c s\u1ef1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi logic.<\/li>\n<\/ul>\n

                          3. Ki\u1ec3u \u0111\u1ed9ng v\u00e0 Ph\u1ea3n chi\u1ebfu \ud83d\udd04<\/h3>\n

                          Trong c\u00e1c ng\u00f4n ng\u1eef c\u00f3 ki\u1ec3u \u0111\u1ed9ng, ki\u1ec3u d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c bi\u1ebft t\u1ea1i th\u1eddi \u0111i\u1ec3m bi\u00ean d\u1ecbch. Ph\u1ea3n chi\u1ebfu cho ph\u00e9p m\u00e3 t\u1ef1 ki\u1ec3m tra ch\u00ednh n\u00f3.<\/p>\n

                            \n
                          • \u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c ph\u00e2n t\u00edch t\u0129nh tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y m\u1ed9t bi\u1ebfn \u0111\u01b0\u1ee3c g\u00e1n c\u00e1c ki\u1ec3u kh\u00e1c nhau.<\/li>\n
                          • H\u00e3y t\u00ecm ki\u1ebfm c\u00e1c m\u1eabu s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 suy ra ki\u1ec3u ch\u00ednh.<\/li>\n
                          • S\u1eed d\u1ee5ng c\u00e1c ch\u00fa th\u00edch trong m\u00e3 \u0111\u1ec3 l\u00e0m r\u00f5 \u00fd \u0111\u1ecbnh n\u1ebfu ki\u1ec3u d\u1eef li\u1ec7u kh\u00f4ng r\u00f5 r\u00e0ng.<\/li>\n<\/ul>\n

                            4. Khung v\u00e0 Th\u01b0 vi\u1ec7n \ud83d\udcda<\/h3>\n

                            M\u00e3 th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00e1c khung b\u00ean ngo\u00e0i. B\u1ea1n kh\u00f4ng mu\u1ed1n v\u1ebd bi\u1ec3u \u0111\u1ed3 cho to\u00e0n b\u1ed9 khung.<\/p>\n

                              \n
                            • B\u1ecf qua c\u00e1c th\u01b0 vi\u1ec7n chu\u1ea9n (v\u00ed d\u1ee5: IO, Math, c\u00e1c ti\u1ec7n \u00edch cho chu\u1ed7i).<\/li>\n
                            • T\u1eadp trung v\u00e0o c\u00e1c l\u1edbp m\u00e0 d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n k\u1ebf th\u1eeba ho\u1eb7c tri\u1ec3n khai t\u1eeb khung.<\/li>\n
                            • S\u1eed d\u1ee5ng bi\u1ec3u di\u1ec5n “h\u1ed9p \u0111en” cho c\u00e1c ph\u1ee5 thu\u1ed9c b\u00ean ngo\u00e0i \u0111\u1ec3 gi\u1eef cho bi\u1ec3u \u0111\u1ed3 s\u1ea1ch s\u1ebd.<\/li>\n<\/ul>\n

                              L\u1ee3i \u00edch cho vi\u1ec7c b\u1ea3o tr\u00ec v\u00e0 t\u00e1i c\u1ea5u tr\u00fac \ud83d\udee0\ufe0f<\/h2>\n

                              T\u1ea1i sao ph\u1ea3i n\u1ed7 l\u1ef1c th\u1ef1c hi\u1ec7n k\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c? L\u1ee3i \u00edch tr\u01b0\u1edbc m\u1eaft l\u00e0 t\u00e0i li\u1ec7u h\u00f3a, nh\u01b0ng gi\u00e1 tr\u1ecb d\u00e0i h\u1ea1n n\u1eb1m \u1edf s\u1ee9c kh\u1ecfe c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

                              1. X\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 s\u1ef1 ph\u1ee5 thu\u1ed9c \ud83c\udfaf<\/h3>\n

                              S\u1ef1 ph\u1ee5 thu\u1ed9c cao khi\u1ebfn h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean mong manh. Khi m\u1ed9t ph\u1ea7n b\u1ecb h\u1ecfng, nhi\u1ec1u ph\u1ea7n kh\u00e1c c\u0169ng b\u1ecb h\u1ecfng. Bi\u1ec3u \u0111\u1ed3 l\u1edbp s\u1ebd l\u00e0m r\u00f5 \u0111i\u1ec1u n\u00e0y m\u1ed9t c\u00e1ch tr\u1ef1c quan.<\/p>\n

                                \n
                              • H\u00e3y t\u00ecm c\u00e1c l\u1edbp c\u00f3 qu\u00e1 nhi\u1ec1u m\u0169i t\u00ean h\u01b0\u1edbng v\u00e0o. \u0110\u00e2y l\u00e0 c\u00e1c “L\u1edbp Ch\u00faa”.<\/li>\n
                              • X\u00e1c \u0111\u1ecbnh c\u00e1c v\u00f2ng l\u1eb7p ch\u1eb7t ch\u1ebd n\u01a1i c\u00e1c l\u1edbp ph\u1ee5 thu\u1ed9c l\u1eabn nhau theo chu k\u1ef3.<\/li>\n
                              • S\u1eed d\u1ee5ng nh\u1eefng hi\u1ec3u bi\u1ebft n\u00e0y \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch cho c\u00e1c n\u1ed7 l\u1ef1c t\u00e1i c\u1ea5u tr\u00fac.<\/li>\n<\/ul>\n

                                2. H\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh h\u1ed9i nh\u1eadp \ud83c\udf93<\/h3>\n

                                Khi m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean m\u1edbi tham gia, vi\u1ec7c \u0111\u1ecdc m\u00e3 l\u00e0 ch\u1eadm. \u0110\u1ecdc bi\u1ec3u \u0111\u1ed3 th\u00ec nhanh.<\/p>\n

                                  \n
                                • Cung c\u1ea5p bi\u1ec3u \u0111\u1ed3 \u0111\u00e3 t\u1ea1o nh\u01b0 m\u1ed9t t\u00e0i nguy\u00ean b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean.<\/li>\n
                                • L\u00e0m n\u1ed5i b\u1eadt c\u00e1c m\u00f4-\u0111un c\u1ed1t l\u00f5i tr\u01b0\u1edbc, sau \u0111\u00f3 \u0111\u1ebfn c\u00e1c m\u00f4-\u0111un ngo\u1ea1i vi.<\/li>\n
                                • Gi\u1ea3m th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3u ki\u1ebfn tr\u00fac.<\/li>\n<\/ul>\n

                                  3. H\u1ed7 tr\u1ee3 hi\u1ec7n \u0111\u1ea1i h\u00f3a h\u1ec7 th\u1ed1ng c\u0169 \ud83d\udd04<\/h3>\n

                                  Khi chuy\u1ec3n t\u1eeb ng\u00f4n ng\u1eef c\u0169 sang ng\u00f4n ng\u1eef m\u1edbi, b\u1ea1n c\u1ea7n b\u1ea3o to\u00e0n logic.<\/p>\n

                                    \n
                                  • M\u00f4 h\u00ecnh UML \u0111\u00f3ng vai tr\u00f2 l\u00e0 m\u1ed9t b\u1ea3n \u0111\u1eb7c t\u1ea3 \u0111\u1ed9c l\u1eadp v\u1edbi ng\u00f4n ng\u1eef.<\/li>\n
                                  • B\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh sang c\u1ea5u tr\u00fac ng\u00f4n ng\u1eef m\u1edbi.<\/li>\n
                                  • \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o logic nghi\u1ec7p v\u1ee5 kh\u00f4ng b\u1ecb m\u1ea5t trong qu\u00e1 tr\u00ecnh di chuy\u1ec3n.<\/li>\n<\/ul>\n

                                    Th\u00e1ch th\u1ee9c v\u00e0 H\u1ea1n ch\u1ebf \u26a0\ufe0f<\/h2>\n

                                    M\u1eb7c d\u00f9 m\u1ea1nh m\u1ebd, quy tr\u00ecnh n\u00e0y kh\u00f4ng ho\u00e0n h\u1ea3o. B\u1ea1n c\u1ea7n nh\u1eadn th\u1ee9c r\u00f5 nh\u1eefng g\u00ec k\u1ef9 thu\u1eadt ph\u00e2n t\u00edch ng\u01b0\u1ee3c kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c.<\/p>\n

                                    1. M\u1ea5t ng\u1eef c\u1ea3nh<\/h3>\n

                                    S\u01a1 \u0111\u1ed3 l\u1edbp ch\u1ec9 th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac, kh\u00f4ng ph\u1ea3i h\u00e0nh vi. N\u00f3 kh\u00f4ng hi\u1ec3n th\u1ecb th\u1ee9 t\u1ef1 th\u1ef1c thi c\u00e1c thao t\u00e1c hay lu\u1ed3ng d\u1eef li\u1ec7u theo th\u1eddi gian.<\/p>\n

                                      \n
                                    • C\u1ea7n c\u00f3 s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c h\u00e0nh vi.<\/li>\n
                                    • C\u00e1c ch\u00fa th\u00edch v\u00e0 m\u00f4 t\u1ea3 logic kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u00f4 h\u00ecnh.<\/li>\n
                                    • M\u00e1y tr\u1ea1ng th\u00e1i th\u01b0\u1eddng b\u1ecb \u1ea9n trong c\u00e1c kh\u1ed1i if-else ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n

                                      2. S\u1ef1 m\u01a1 h\u1ed3 trong \u0111\u1eb7t t\u00ean<\/h3>\n

                                      M\u00e3 th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c t\u00ean bi\u1ebfn kh\u00f3 hi\u1ec3u. S\u01a1 \u0111\u1ed3 s\u1ebd ph\u1ea3n \u00e1nh nh\u1eefng t\u00ean k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng n\u00e0y tr\u1eeb khi b\u1ea1n \u0111\u1ed5i t\u00ean ch\u00fang.<\/p>\n

                                        \n
                                      • Vi\u1ec7c \u0111\u1ed5i t\u00ean trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch ng\u01b0\u1ee3c l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh mang t\u00ednh ch\u1ee7 quan.<\/li>\n
                                      • An to\u00e0n h\u01a1n l\u00e0 gi\u1eef nguy\u00ean t\u00ean g\u1ed1c v\u00e0 th\u00eam ghi ch\u00fa gi\u1ea3i th\u00edch ch\u00fang.<\/li>\n
                                      • Vi\u1ec7c t\u00e1i c\u1ea5u tr\u00fac t\u00ean n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong m\u00e3 ngu\u1ed3n, kh\u00f4ng ch\u1ec9 trong s\u01a1 \u0111\u1ed3.<\/li>\n<\/ul>\n

                                        3. Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/h3>\n

                                        C\u00e1c h\u1ec7 th\u1ed1ng l\u1edbn c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 kh\u1ed5ng l\u1ed3 kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n

                                          \n
                                        • S\u1eed d\u1ee5ng c\u1ee5m \u0111\u1ec3 nh\u00f3m c\u00e1c l\u1edbp li\u00ean quan.<\/li>\n
                                        • T\u1eadp trung v\u00e0o c\u00e1c ch\u1ebf \u0111\u1ed9 xem c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: \u201cCh\u1ebf \u0111\u1ed9 xem C\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d, \u201cCh\u1ebf \u0111\u1ed9 xem Giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng\u201d) thay v\u00ec m\u1ed9t b\u1ea3n \u0111\u1ed3 kh\u1ed5ng l\u1ed3 duy nh\u1ea5t.<\/li>\n
                                        • H\u00e3y ch\u1ea5p nh\u1eadn r\u1eb1ng s\u01a1 \u0111\u1ed3 l\u00e0 m\u1ed9t t\u1eadp con c\u1ee7a th\u1ef1c t\u1ebf, kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ea3n sao ph\u1ea3n chi\u1ebfu.<\/li>\n<\/ul>\n

                                          Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho m\u00f4 h\u00ecnh h\u00f3a ch\u00ednh x\u00e1c \u2705<\/h2>\n

                                          \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c s\u01a1 \u0111\u1ed3 ph\u00e2n t\u00edch ng\u01b0\u1ee3c c\u1ee7a b\u1ea1n h\u1eefu \u00edch, h\u00e3y tu\u00e2n th\u1ee7 c\u00e1c h\u01b0\u1edbng d\u1eabn sau.<\/p>\n

                                            \n
                                          • T\u00ednh nh\u1ea5t qu\u00e1n:<\/strong>S\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t phong c\u00e1ch k\u00fd hi\u1ec7u xuy\u00ean su\u1ed1t. Kh\u00f4ng tr\u1ed9n l\u1eabn \u0111\u01b0\u1eddng li\u1ec1n v\u00e0 \u0111\u01b0\u1eddng \u0111\u1ee9t n\u00e9t cho c\u00f9ng m\u1ed9t lo\u1ea1i quan h\u1ec7.<\/li>\n
                                          • T\u00ednh tr\u1eebu t\u01b0\u1ee3ng:<\/strong>Kh\u00f4ng n\u00ean bao g\u1ed3m m\u1ecdi ph\u01b0\u01a1ng th\u1ee9c. H\u00e3y nh\u00f3m c\u00e1c ph\u01b0\u01a1ng th\u1ee9c li\u00ean quan ho\u1eb7c lo\u1ea1i b\u1ecf c\u00e1c getter\/setter n\u1ebfu ch\u00fang l\u00e0m r\u1ed1i m\u1eaft.<\/li>\n
                                          • Ki\u1ec3m tra:<\/strong>\u0110\u1ed1i chi\u1ebfu s\u01a1 \u0111\u1ed3 v\u1edbi m\u00e3 ngu\u1ed3n. N\u1ebfu m\u00e3 thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3.<\/li>\n
                                          • T\u1ef1 \u0111\u1ed9ng h\u00f3a:<\/strong>Khi c\u00f3 th\u1ec3, h\u00e3y s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 \u0111\u1ec3 t\u1ea1o b\u1ea3n nh\u00e1p ban \u0111\u1ea7u. \u0110\u1eebng ch\u1ec9 d\u1ef1a v\u00e0o vi\u1ec7c v\u1ebd th\u1ee7 c\u00f4ng.<\/li>\n
                                          • T\u00e0i li\u1ec7u:<\/strong>Th\u00eam ghi ch\u00fa v\u00e0o bi\u1ec3u \u0111\u1ed3 \u0111\u1ec3 gi\u1ea3i th\u00edch c\u00e1c logic ph\u1ee9c t\u1ea1p m\u00e0 m\u00f4 h\u00ecnh tr\u1ef1c quan kh\u00f4ng th\u1ec3 hi\u1ec3n th\u1ecb.<\/li>\n<\/ul>\n

                                            Nh\u1eefng suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 vi\u1ec7c tr\u1ef1c quan h\u00f3a logic \ud83d\udca1<\/h2>\n

                                            K\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c UML t\u1eeb m\u00e3 ngu\u1ed3n l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa thi\u1ebft k\u1ebf tr\u1eebu t\u01b0\u1ee3ng v\u00e0 tri\u1ec3n khai c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 ch\u00fa \u00fd \u0111\u1ebfn chi ti\u1ebft. B\u1eb1ng c\u00e1ch hi\u1ec3u c\u00e1c m\u1ed1i quan h\u1ec7, ph\u1ea1m vi hi\u1ec3n th\u1ecb v\u00e0 c\u1ea5u tr\u00fac, b\u1ea1n s\u1ebd n\u1eafm quy\u1ec1n ki\u1ec3m so\u00e1t c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p.<\/p>\n

                                            M\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 ho\u00e0n h\u1ea3o, m\u00e0 l\u00e0 s\u1ef1 r\u00f5 r\u00e0ng. M\u1ed9t bi\u1ec3u \u0111\u1ed3 h\u01a1i kh\u00f4ng ho\u00e0n h\u1ea3o v\u1eabn t\u1ed1t h\u01a1n l\u00e0 kh\u00f4ng c\u00f3 bi\u1ec3u \u0111\u1ed3 n\u00e0o c\u1ea3. H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb nh\u1eefng \u0111i\u1ec1u nh\u1ecf, t\u1eadp trung v\u00e0o c\u00e1c l\u1edbp c\u1ed1t l\u00f5i v\u00e0 m\u1edf r\u1ed9ng d\u1ea7n khi b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1c ph\u1ee5 thu\u1ed9c. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y x\u00e2y d\u1ef1ng m\u1ed9t th\u1ef1c h\u00e0nh t\u00e0i li\u1ec7u b\u1ec1n v\u1eefng h\u1ed7 tr\u1ee3 ph\u00e1t tri\u1ec3n d\u00e0i h\u1ea1n.<\/p>\n

                                            H\u00e3y nh\u1edb r\u1eb1ng, m\u00e3 ngu\u1ed3n l\u00e0 s\u1ef1 th\u1eadt. Bi\u1ec3u \u0111\u1ed3 l\u00e0 b\u1ea3n \u0111\u1ed3. H\u00e3y \u0111\u1ea3m b\u1ea3o b\u1ea3n \u0111\u1ed3 kh\u1edbp v\u1edbi l\u00e3nh \u0111\u1ecba. V\u1edbi n\u1ed7 l\u1ef1c nh\u1ea5t qu\u00e1n, b\u1ea1n c\u00f3 th\u1ec3 duy tr\u00ec c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 ki\u1ebfn tr\u00fac c\u1ee7a m\u00ecnh, b\u1ea5t k\u1ec3 m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o theo th\u1eddi gian.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                            L\u00e0m vi\u1ec7c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 th\u01b0\u1eddng gi\u1ed1ng nh\u01b0 vi\u1ec7c \u0111i trong m\u1ed9t m\u00ea cung kh\u00f4ng c\u00f3 b\u1ea3n \u0111\u1ed3. B\u1ea1n c\u00f3 nh\u1eefng d\u00f2ng m\u00e3, nh\u01b0ng vi\u1ec7c hi\u1ec3u c\u1ea5u tr\u00fac…<\/p>\n","protected":false},"author":1,"featured_media":710,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"K\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c UML: H\u01b0\u1edbng d\u1eabn t\u1eeb M\u00e3 sang Bi\u1ec3u \u0111\u1ed3 L\u1edbp \ud83d\udcca","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch k\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c bi\u1ec3u \u0111\u1ed3 l\u1edbp UML t\u1eeb m\u00e3 ngu\u1ed3n. M\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u1ea5u tr\u00fac, m\u1ed1i quan h\u1ec7 v\u00e0 m\u1eabu h\u00ecnh c\u1ee7a ph\u1ea7n m\u1ec1m.","inline_featured_image":false,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[44],"tags":[49,50],"class_list":["post-709","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","tag-academic","tag-uml"],"yoast_head":"\nK\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c UML: H\u01b0\u1edbng d\u1eabn t\u1eeb M\u00e3 sang Bi\u1ec3u \u0111\u1ed3 L\u1edbp \ud83d\udcca<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch k\u1ef9 thu\u1eadt \u0111\u1ea3o ng\u01b0\u1ee3c bi\u1ec3u \u0111\u1ed3 l\u1edbp UML t\u1eeb m\u00e3 ngu\u1ed3n. 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