{"id":1470,"date":"2026-03-27T10:48:14","date_gmt":"2026-03-27T10:48:14","guid":{"rendered":"https:\/\/www.method-post.com\/vn\/beyond-basics-adding-behavioral-details-class-diagrams\/"},"modified":"2026-03-27T10:48:14","modified_gmt":"2026-03-27T10:48:14","slug":"beyond-basics-adding-behavioral-details-class-diagrams","status":"publish","type":"post","link":"https:\/\/www.method-post.com\/vn\/beyond-basics-adding-behavioral-details-class-diagrams\/","title":{"rendered":"V\u01b0\u1ee3t ra ngo\u00e0i nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n: Th\u00eam chi ti\u1ebft h\u00e0nh vi v\u00e0o s\u01a1 \u0111\u1ed3 l\u1edbp t\u0129nh c\u1ee7a b\u1ea1n"},"content":{"rendered":"

Khi c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, n\u1ec1n t\u1ea3ng th\u01b0\u1eddng n\u1eb1m \u1edf c\u1ea5u tr\u00fac t\u0129nh. S\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho ki\u1ebfn tr\u00fac n\u00e0y, \u0111\u1ecbnh ngh\u0129a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, thu\u1ed9c t\u00ednh c\u1ee7a ch\u00fang v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. Tuy nhi\u00ean, vi\u1ec7c ch\u1ec9 xem x\u00e9t m\u1ed9t c\u00e1i nh\u00ecn t\u0129nh th\u01b0\u1eddng \u0111\u1ec3 l\u1ea1i nh\u1eefng c\u00e2u h\u1ecfi then ch\u1ed1t ch\u01b0a \u0111\u01b0\u1ee3c tr\u1ea3 l\u1eddi. H\u1ec7 th\u1ed1ng th\u1ef1c s\u1ef1 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? Nh\u1eefng quy t\u1eafc n\u00e0o \u0111i\u1ec1u khi\u1ec3n thao t\u00e1c d\u1eef li\u1ec7u? \u0110i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ed9t \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n? \u0110\u1ec3 l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch gi\u1eefa c\u1ea5u tr\u00fac v\u00e0 th\u1ef1c thi, c\u1ea7n thi\u1ebft ph\u1ea3i \u0111\u01b0a c\u00e1c chi ti\u1ebft h\u00e0nh vi v\u00e0o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y.<\/p>\n

Th\u1ef1c h\u00e0nh th\u00f4ng th\u01b0\u1eddng th\u01b0\u1eddng d\u1eebng l\u1ea1i \u1edf vi\u1ec7c \u0111\u1ecbnh ngh\u0129a thu\u1ed9c t\u00ednh v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 c\u01a1 b\u1ea3n. D\u00f9 \u0111i\u1ec1u n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan s\u01a1 l\u01b0\u1ee3c, nh\u01b0ng l\u1ea1i kh\u00f4ng truy\u1ec1n \u0111\u1ea1t \u0111\u01b0\u1ee3c logic \u0111\u01b0\u1ee3c nh\u00fang b\u00ean trong m\u00e3 ngu\u1ed3n. B\u1eb1ng c\u00e1ch l\u00e0m phong ph\u00fa s\u01a1 \u0111\u1ed3 l\u1edbp t\u0129nh c\u1ee7a b\u1ea1n b\u1eb1ng th\u00f4ng tin h\u00e0nh vi, b\u1ea1n bi\u1ebfn m\u1ed9t b\u1ea3n \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n th\u00e0nh m\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u00fd \u0111\u1ecbnh thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c duy tr\u00ec xuy\u00ean su\u1ed1t v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3 v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec.<\/p>\n

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

\ud83e\udd14 T\u1ea1i sao c\u1ea7n n\u00e2ng cao s\u01a1 \u0111\u1ed3 t\u0129nh b\u1eb1ng h\u00e0nh vi?<\/h2>\n

S\u01a1 \u0111\u1ed3 l\u1edbp v\u1ed1n d\u0129 l\u00e0 t\u0129nh. N\u00f3 ghi l\u1ea1i h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m duy nh\u1ea5t. N\u00f3 cho th\u1ea5y nh\u1eefng g\u00ec t\u1ed3n t\u1ea1i, nh\u01b0ng kh\u00f4ng nh\u1ea5t thi\u1ebft cho th\u1ea5y \u0111i\u1ec1u g\u00ec x\u1ea3y ra. \u1ede nhi\u1ec1u d\u1ef1 \u00e1n, \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 t\u00e1ch r\u1eddi gi\u1eefa t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai th\u1ef1c t\u1ebf. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n th\u01b0\u1eddng ph\u1ea3i suy di\u1ec5n h\u00e0nh vi t\u1eeb c\u00e1c ch\u00fa th\u00edch m\u00e3 ngu\u1ed3n ho\u1eb7c t\u00e0i li\u1ec7u ri\u00eang bi\u1ec7t, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n.<\/p>\n

Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c chi ti\u1ebft h\u00e0nh vi tr\u1ef1c ti\u1ebfp v\u00e0o h\u1ed9p l\u1edbp gi\u1ea3i quy\u1ebft nhi\u1ec1u th\u00e1ch th\u1ee9c ph\u1ed5 bi\u1ebfn:<\/p>\n

    \n
  • L\u00e0m r\u00f5 m\u1ee5c \u0111\u00edch:<\/strong>N\u00f3 n\u00eau r\u00f5 m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng \u0111i\u1ec1u m\u00e0 m\u1ed9t l\u1edbp ch\u1ecbu tr\u00e1ch nhi\u1ec7m th\u1ef1c hi\u1ec7n, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 d\u1eef li\u1ec7u m\u00e0 n\u00f3 l\u01b0u tr\u1eef.<\/li>\n
  • Gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c:<\/strong>C\u00e1c k\u1ef9 s\u01b0 kh\u00f4ng c\u1ea7n tham chi\u1ebfu nhi\u1ec1u s\u01a1 \u0111\u1ed3 kh\u00e1c nhau \u0111\u1ec3 hi\u1ec3u to\u00e0n b\u1ed9 ph\u1ea1m vi c\u1ee7a m\u1ed9t l\u1edbp.<\/li>\n
  • X\u00e1c minh s\u1edbm:<\/strong>Ph\u00e1t hi\u1ec7n c\u00e1c kho\u1ea3ng tr\u1ed1ng logic ho\u1eb7c thi\u1ebfu x\u1eed l\u00fd l\u1ed7i trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf.<\/li>\n
  • T\u00ednh nh\u1ea5t qu\u00e1n:<\/strong>\u0110\u1ea3m b\u1ea3o r\u1eb1ng h\u1ee3p \u0111\u1ed3ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p v\u1edbi m\u00e3 \u0111\u01b0\u1ee3c vi\u1ebft sau n\u00e0y.<\/li>\n<\/ul>\n

    X\u00e9t m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 m\u1ed9t l\u1edbp x\u1eed l\u00fd c\u00e1c giao d\u1ecbch t\u00e0i ch\u00ednh. M\u1ed9t s\u01a1 \u0111\u1ed3 c\u01a1 b\u1ea3n c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecbs\u1ed1 d\u01b0<\/em>l\u00e0 m\u1ed9t thu\u1ed9c t\u00ednh. M\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c n\u00e2ng cao s\u1ebd hi\u1ec3n th\u1ecb c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0debit()<\/em> v\u00e0 credit()<\/em> v\u1edbi c\u00e1c r\u00e0ng bu\u1ed9c c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 ng\u0103n ch\u1eb7n c\u00e1c s\u1ed1 d\u01b0 \u00e2m. S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y thay \u0111\u1ed5i s\u01a1 \u0111\u1ed3 t\u1eeb m\u1ed9t m\u00f4 h\u00ecnh d\u1eef li\u1ec7u th\u00e0nh m\u1ed9t \u0111\u1eb7c t\u1ea3 ch\u1ee9c n\u0103ng.<\/p>\n

    \u2699\ufe0f K\u00fd hi\u1ec7u ph\u01b0\u01a1ng th\u1ee9c v\u00e0 thao t\u00e1c<\/h2>\n

    C\u00e1ch tr\u1ef1c ti\u1ebfp nh\u1ea5t \u0111\u1ec3 th\u00eam chi ti\u1ebft h\u00e0nh vi l\u00e0 th\u00f4ng qua \u0111\u1ecbnh ngh\u0129a r\u00f5 r\u00e0ng c\u00e1c thao t\u00e1c (ph\u01b0\u01a1ng th\u1ee9c). Nhi\u1ec1u m\u1eabu ch\u1ec9 li\u1ec7t k\u00ea t\u00ean ph\u01b0\u01a1ng th\u1ee9c. \u0110\u1ec3 th\u00eam chi\u1ec1u s\u00e2u, b\u1ea1n ph\u1ea3i bao g\u1ed3m k\u00fd hi\u1ec7u \u0111\u1ea7y \u0111\u1ee7. \u0110i\u1ec1u n\u00e0y cung c\u1ea5p ngay l\u1eadp t\u1ee9c b\u1ed1i c\u1ea3nh v\u1ec1 \u0111\u1ea7u v\u00e0o, \u0111\u1ea7u ra v\u00e0 c\u00e1c hi\u1ec7u \u1ee9ng ph\u1ee5.<\/p>\n

    1. Quy\u1ec1n truy c\u1eadp v\u00e0 c\u00e1c b\u1ed9 s\u1eeda \u0111\u1ed5i<\/h3>\n

    K\u00fd hi\u1ec7u UML ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u nh\u01b0 +<\/code> \u0111\u1ec3 ch\u1ec9 c\u00f4ng khai, -<\/code> \u0111\u1ec3 ch\u1ec9 ri\u00eang t\u01b0, v\u00e0 #<\/code> cho protected. \u0110\u1ea3m b\u1ea3o c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y c\u00f3 m\u1eb7t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ki\u1ec3m so\u00e1t truy c\u1eadp. Ngo\u00e0i \u0111\u1ed9 hi\u1ec3n th\u1ecb, h\u00e3y c\u00e2n nh\u1eafc th\u00eam c\u00e1c b\u1ed9 s\u1eeda \u0111\u1ed5i nh\u01b0 static<\/code>, abstract<\/code>, ho\u1eb7c virtual<\/code> n\u1ebfu c\u00f4ng c\u1ee5 v\u1ebd s\u01a1 \u0111\u1ed3 h\u1ed7 tr\u1ee3. \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u01b0\u1eddi \u0111\u1ecdc hi\u1ec3u v\u1ec1 v\u00f2ng \u0111\u1eddi v\u00e0 c\u00e1c y\u00eau c\u1ea7u kh\u1edfi t\u1ea1o c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c.<\/p>\n

    2. Tham s\u1ed1 v\u00e0 Ki\u1ec3u d\u1eef li\u1ec7u<\/h3>\n

    \u0110\u1eebng ch\u1ec9 li\u1ec7t k\u00ea t\u00ean tham s\u1ed1. H\u00e3y bao g\u1ed3m ki\u1ec3u d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u v\u1ec1 t\u00ednh an to\u00e0n ki\u1ec3u d\u1eef li\u1ec7u v\u00e0 c\u00e1c y\u00eau c\u1ea7u x\u00e1c th\u1ef1c.<\/p>\n

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    • C\u00e1c tham s\u1ed1 \u0111\u1ea7u v\u00e0o:<\/strong>X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u m\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
    • C\u00e1c ki\u1ec3u \u0111\u1ea7u ra:<\/strong> X\u00e1c \u0111\u1ecbnh r\u00f5 ki\u1ec3u tr\u1ea3 v\u1ec1.<\/li>\n
    • Gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh:<\/strong> N\u1ebfu m\u1ed9t tham s\u1ed1 c\u00f3 gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh, h\u00e3y ch\u1ec9 ra \u0111i\u1ec1u n\u00e0y. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y c\u1ea5u h\u00ecnh t\u00f9y ch\u1ecdn.<\/li>\n<\/ul>\n

      3. Ngo\u1ea1i l\u1ec7 v\u00e0 hi\u1ec7u \u1ee9ng ph\u1ee5<\/h3>\n

      C\u00e1c ph\u01b0\u01a1ng th\u1ee9c hi\u1ebfm khi ch\u1ea1y m\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng th\u1ea5t b\u1ea1i. Vi\u1ec7c ghi ch\u00fa c\u00e1c ngo\u1ea1i l\u1ec7 ti\u1ec1m \u1ea9n trong s\u01a1 \u0111\u1ed3 l\u1edbp s\u1ebd \u0111\u1eb7t ra k\u1ef3 v\u1ecdng v\u1ec1 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c x\u1eed l\u00fd l\u1ed7i.<\/p>\n

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      • C\u00e2u l\u1ec7nh Throws:<\/strong> Li\u1ec7t k\u00ea r\u00f5 r\u00e0ng c\u00e1c ngo\u1ea1i l\u1ec7 m\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c c\u00f3 th\u1ec3 n\u00e9m ra (v\u00ed d\u1ee5: throws InsufficientFundsException<\/code>).<\/li>\n
      • H\u1eadu qu\u1ea3 ph\u1ee5:<\/strong> N\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i b\u00ean ngo\u00e0i ho\u1eb7c k\u00edch ho\u1ea1t m\u1ed9t s\u1ef1 ki\u1ec7n, h\u00e3y ghi ch\u00fa \u0111i\u1ec1u n\u00e0y trong th\u00e2n ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c th\u00f4ng qua m\u1ed9t ghi ch\u00fa \u0111\u00ednh k\u00e8m v\u00e0o thao t\u00e1c.<\/li>\n<\/ul>\n

        \ud83d\udcdd C\u00e1c r\u00e0ng bu\u1ed9c v\u00e0 b\u1ea5t bi\u1ebfn<\/h2>\n

        H\u00e0nh vi th\u01b0\u1eddng b\u1ecb chi ph\u1ed1i b\u1edfi c\u00e1c quy t\u1eafc. Nh\u1eefng quy t\u1eafc n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n v\u1ec1 m\u1eb7t logic. Trong s\u01a1 \u0111\u1ed3 l\u1edbp, c\u00e1c r\u00e0ng bu\u1ed9c \u0111\u00f3ng vai tr\u00f2 nh\u01b0 c\u00e1c thanh ch\u1eafn b\u1ea3o v\u1ec7 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a b\u1ea1n. Ch\u00fang ng\u0103n h\u1ec7 th\u1ed1ng r\u01a1i v\u00e0o c\u00e1c tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7.<\/p>\n

        1. \u0110i\u1ec1u ki\u1ec7n ti\u1ec1n v\u00e0 \u0111i\u1ec1u ki\u1ec7n h\u1eadu<\/h3>\n

        \u0110\u00e2y l\u00e0 nh\u1eefng lo\u1ea1i r\u00e0ng bu\u1ed9c h\u00e0nh vi c\u1ee5 th\u1ec3 m\u00f4 t\u1ea3 tr\u1ea1ng th\u00e1i c\u1ee7a h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc v\u00e0 sau khi m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c th\u1ef1c thi.<\/p>\n

          \n
        • \u0110i\u1ec1u ki\u1ec7n ti\u1ec1n:<\/strong>C\u00e1c y\u00eau c\u1ea7u ph\u1ea3i \u0111\u00fang tr\u01b0\u1edbc khi ph\u01b0\u01a1ng th\u1ee9c ch\u1ea1y. V\u00ed d\u1ee5, input != null<\/code>.<\/li>\n
        • \u0110i\u1ec1u ki\u1ec7n sau:<\/strong>C\u00e1c \u0111\u1ea3m b\u1ea3o v\u1ec1 tr\u1ea1ng th\u00e1i sau khi ph\u01b0\u01a1ng th\u1ee9c k\u1ebft th\u00fac. V\u00ed d\u1ee5, result > 0<\/code>.<\/li>\n<\/ul>\n

          2. C\u00e1c b\u1ea5t bi\u1ebfn<\/h3>\n

          M\u1ed9t b\u1ea5t bi\u1ebfn l\u00e0 m\u1ed9t \u0111i\u1ec1u ki\u1ec7n ph\u1ea3i lu\u00f4n \u0111\u00fang cho m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp, b\u1ea5t k\u1ec3 thao t\u00e1c n\u00e0o \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. \u0110i\u1ec1u n\u00e0y r\u1ea5t m\u1ea1nh m\u1ebd trong vi\u1ec7c duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

            \n
          • V\u00ed d\u1ee5:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed9t BankAccount<\/code>l\u1edbp, m\u1ed9t b\u1ea5t bi\u1ebfn c\u00f3 th\u1ec3 l\u00e0 s\u1ed1 d\u01b0 >= 0<\/code>.<\/li>\n
          • Th\u1ef1c thi:<\/strong>\u0110\u1eb7t nh\u1eefng \u0111i\u1ec1u n\u00e0y v\u00e0o ph\u1ea7n r\u00e0ng bu\u1ed9c c\u1ee7a h\u1ed9p l\u1edbp ho\u1eb7c nh\u01b0 m\u1ed9t ghi ch\u00fa li\u00ean k\u1ebft v\u1edbi l\u1edbp.<\/li>\n<\/ul>\n

            3. Thu\u1ed9c t\u00ednh d\u1eabn xu\u1ea5t<\/h3>\n

            M\u1ed9t s\u1ed1 d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef m\u00e0 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n. \u0110\u00e1nh d\u1ea5u m\u1ed9t thu\u1ed9c t\u00ednh l\u00e0 d\u1eabn xu\u1ea5t (\u0111\u01b0\u1ee3c ti\u1ec1n t\u1ed1 b\u1eb1ng “\/<\/code>) cho bi\u1ebft n\u00f3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y l\u00e0m r\u00f5 r\u1eb1ng gi\u00e1 tr\u1ecb thay \u0111\u1ed5i d\u1ef1a tr\u00ean c\u00e1c thu\u1ed9c t\u00ednh kh\u00e1c ho\u1eb7c c\u00e1c y\u1ebfu t\u1ed1 b\u00ean ngo\u00e0i.<\/p>\n

            \ud83d\udd04 Bi\u1ec3u di\u1ec5n tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9<\/h2>\n

            M\u1eb7c d\u00f9 m\u00e1y tr\u1ea1ng th\u00e1i th\u01b0\u1eddng l\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 ri\u00eang bi\u1ec7t, vi\u1ec7c ch\u1ec9 ra c\u00e1c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i b\u00ean trong h\u1ed9p l\u1edbp gi\u00fap h\u00ecnh dung qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi m\u00e0 kh\u00f4ng g\u00e2y r\u1ed1i s\u01a1 \u0111\u1ed3. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho c\u00e1c l\u1edbp c\u00f3 c\u00e1c giai \u0111o\u1ea1n r\u00f5 r\u1ec7t, ch\u1eb3ng h\u1ea1n nh\u01b0\u0110ang ch\u1edd<\/em>, \u0110ang ho\u1ea1t \u0111\u1ed9ng<\/em>, ho\u1eb7c \u0110\u00e3 l\u01b0u tr\u1eef<\/em>.<\/p>\n

            1. Li\u1ec7t k\u00ea tr\u1ea1ng th\u00e1i<\/h3>\n

            S\u1eed d\u1ee5ng m\u1ed9t li\u1ec7t k\u00ea \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c tr\u1ea1ng th\u00e1i h\u1ee3p l\u1ec7. \u0110i\u1ec1u n\u00e0y gi\u1edbi h\u1ea1n \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ec9 \u1edf m\u1ed9t t\u1eadp h\u1ee3p h\u1eefu h\u1ea1n c\u00e1c \u0111i\u1ec1u ki\u1ec7n.<\/p>\n

              \n
            • \u0110\u1ecbnh ngh\u0129a:<\/strong> T\u1ea1o m\u1ed9t thu\u1ed9c t\u00ednh c\u00f3 ki\u1ec3u StateEnum<\/code>.<\/li>\n
            • \u0110\u1ed9 hi\u1ec3n th\u1ecb:<\/strong> \u0110\u1ea3m b\u1ea3o r\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c thi\u1ebft l\u1eadp cho tr\u1ea1ng th\u00e1i n\u00e0y \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c chuy\u1ec3n \u0111\u1ed5i kh\u00f4ng h\u1ee3p l\u1ec7.<\/li>\n<\/ul>\n

              2. Logic chuy\u1ec3n \u0111\u1ed5i<\/h3>\n

              B\u1ea1n c\u00f3 th\u1ec3 m\u00f4 t\u1ea3 logic chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i trong ph\u1ea7n m\u00f4 t\u1ea3 ph\u01b0\u01a1ng th\u1ee9c. V\u00ed d\u1ee5, m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c c\u00f3 t\u00ean l\u00e0submitOrder()<\/code> c\u00f3 th\u1ec3 ng\u1ee5 \u00fd m\u1ed9t chuy\u1ec3n \u0111\u1ed5i t\u1eeb\u0110\u00e3 t\u1ea1o<\/em> sang\u0110\u00e3 g\u1eedi<\/em>.<\/p>\n

              Xem x\u00e9t b\u1ea3ng sau \u0111\u00e2y \u0111\u1ec3 hi\u1ec3u c\u00e1ch logic tr\u1ea1ng th\u00e1i t\u00edch h\u1ee3p v\u1edbi \u0111\u1ecbnh ngh\u0129a ph\u01b0\u01a1ng th\u1ee9c:<\/p>\n\n\n\n\n\n\n\n
              Ph\u01b0\u01a1ng th\u1ee9c<\/th>\nChuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i<\/th>\n\u0110i\u1ec1u ki\u1ec7n<\/th>\n<\/tr>\n<\/thead>\n
              startProcess()<\/code><\/td>\n\u0110ang ch\u1edd<\/em> \u279d \u0110ang ch\u1ea1y<\/em><\/td>\nT\u00e0i nguy\u00ean s\u1eb5n s\u00e0ng<\/td>\n<\/tr>\n
              ho\u00e0nTh\u00e0nhNhi\u1ec7mV\u1ee5()<\/code><\/td>\n\u0110ang ch\u1ea1y<\/em> \u279d \u0110\u00e3 xong<\/em><\/td>\nX\u00e1c th\u1ef1c th\u00e0nh c\u00f4ng<\/td>\n<\/tr>\n
              h\u1ee7yNhi\u1ec7mV\u1ee5()<\/code><\/td>\n\u0110ang ch\u1ea1y<\/em> \u279d \u0110\u00e3 h\u1ee7y<\/em><\/td>\nCh\u01b0a ho\u00e0n t\u1ea5t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              C\u00e1ch ti\u1ebfp c\u1eadn b\u1ea3ng n\u00e0y trong t\u00e0i li\u1ec7u (ho\u1eb7c nh\u01b0 m\u1ed9t ghi ch\u00fa tr\u00ean l\u1edbp) cung c\u1ea5p tham chi\u1ebfu nhanh cho v\u00f2ng \u0111\u1eddi c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

              \ud83d\udd0c Giao di\u1ec7n v\u00e0 H\u1ee3p \u0111\u1ed3ng<\/h2>\n

              H\u00e0nh vi th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi \u0111i\u1ec1u m\u00e0 m\u1ed9t l\u1edbp h\u1ee9a h\u1eb9n s\u1ebd l\u00e0m, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e1ch th\u1ee9c th\u1ef1c hi\u1ec7n. Giao di\u1ec7n l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n ch\u00ednh cho cam k\u1ebft n\u00e0y. Vi\u1ec7c t\u00edch h\u1ee3p chi ti\u1ebft giao di\u1ec7n v\u00e0o s\u01a1 \u0111\u1ed3 l\u1edbp s\u1ebd l\u00e0m r\u00f5 h\u1ee3p \u0111\u1ed3ng gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n.<\/p>\n

              1. M\u1ed1i quan h\u1ec7 tri\u1ec3n khai<\/h3>\n

              S\u1eed d\u1ee5ng \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t c\u00f3 m\u0169i t\u00ean r\u1ed7ng \u0111\u1ec3 th\u1ec3 hi\u1ec7n r\u1eb1ng m\u1ed9t l\u1edbp th\u1ef1c hi\u1ec7n m\u1ed9t giao di\u1ec7n. \u0110i\u1ec1u n\u00e0y ngay l\u1eadp t\u1ee9c cho th\u1ea5y l\u1edbp \u0111\u00f3 ph\u1ea3i cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u1ee5 th\u1ec3.<\/p>\n

                \n
              • L\u1ee3i \u00edch:<\/strong>N\u00f3 t\u00e1ch bi\u1ec7t vi\u1ec7c tri\u1ec3n khai kh\u1ecfi vi\u1ec7c s\u1eed d\u1ee5ng.<\/li>\n
              • Chi ti\u1ebft:<\/strong>Li\u1ec7t k\u00ea c\u00e1c ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u b\u1edfi giao di\u1ec7n trong th\u00e2n l\u1edbp, ngay c\u1ea3 khi ch\u00fang \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba, \u0111\u1ec3 th\u1ec3 hi\u1ec7n s\u1ef1 tu\u00e2n th\u1ee7.<\/li>\n<\/ul>\n

                2. L\u1edbp tr\u1eebu t\u01b0\u1ee3ng<\/h3>\n

                C\u00e1c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng \u0111\u1ecbnh ngh\u0129a m\u1ed9t ph\u1ea7n tri\u1ec3n khai. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t m\u1eabu cho h\u00e0nh vi. Vi\u1ec7c \u0111\u00e1nh d\u1ea5u m\u1ed9t l\u1edbp l\u00e0 tr\u1eebu t\u01b0\u1ee3ng (t\u00ean in nghi\u00eang) cho th\u1ea5y n\u00f3 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o tr\u1ef1c ti\u1ebfp.<\/p>\n

                  \n
                • Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/strong>L\u00fd t\u01b0\u1edfng \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a h\u00e0nh vi chung tr\u00ean m\u1ed9t nh\u00f3m c\u00e1c l\u1edbp li\u00ean quan.<\/li>\n
                • Chi ti\u1ebft:<\/strong>Hi\u1ec3n th\u1ecb c\u00e1c ph\u01b0\u01a1ng th\u1ee9c chung v\u00e0 \u0111\u1ec3 tr\u1ed1ng c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 ho\u1eb7c \u0111\u00e1nh d\u1ea5u l\u00e0tr\u1eebu t\u01b0\u1ee3ng<\/code>.<\/li>\n<\/ul>\n

                  \ud83d\udccc Ghi ch\u00fa v\u00e0 ch\u00fa th\u00edch<\/h2>\n

                  Kh\u00f4ng ph\u1ea3i m\u1ecdi chi ti\u1ebft n\u00e0o c\u0169ng v\u1eeba v\u1eb7n v\u00e0o ch\u1eef k\u00fd ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c r\u00e0ng bu\u1ed9c. \u0110\u00f4i khi, b\u1ea1n c\u1ea7n m\u1ed9t b\u1ed1i c\u1ea3nh r\u1ed9ng h\u01a1n. Ghi ch\u00fa UML cho ph\u00e9p b\u1ea1n \u0111\u00ednh k\u00e8m v\u0103n b\u1ea3n, s\u01a1 \u0111\u1ed3 ho\u1eb7c li\u00ean k\u1ebft v\u00e0o b\u1ea5t k\u1ef3 ph\u1ea7n n\u00e0o trong s\u01a1 \u0111\u1ed3 l\u1edbp.<\/p>\n

                  1. Gi\u1ea3i th\u00edch h\u00e0nh vi<\/h3>\n

                  S\u1eed d\u1ee5ng ghi ch\u00fa \u0111\u1ec3 gi\u1ea3i th\u00edch logic ph\u1ee9c t\u1ea1p qu\u00e1 d\u00e0i d\u00f2ng \u0111\u1ec3 \u0111\u01b0a v\u00e0o ch\u1eef k\u00fd. V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c x\u1eed l\u00fd d\u1eef li\u1ec7u theo c\u00e1ch b\u1ea5t \u0111\u1ed3ng b\u1ed9, m\u1ed9t ghi ch\u00fa c\u00f3 th\u1ec3 m\u00f4 t\u1ea3 m\u00f4 h\u00ecnh \u0111a lu\u1ed3ng ho\u1eb7c c\u01a1 ch\u1ebf g\u1ecdi l\u1ea1i.<\/p>\n

                  2. Tham chi\u1ebfu \u0111\u1ebfn t\u00e0i li\u1ec7u tham kh\u1ea3o b\u00ean ngo\u00e0i<\/h3>\n

                  N\u1ebfu h\u00e0nh vi \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong m\u1ed9t t\u00e0i li\u1ec7u ri\u00eang bi\u1ec7t (nh\u01b0 m\u1ed9t t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 API), h\u00e3y t\u1ea1o li\u00ean k\u1ebft \u0111\u1ebfn n\u00f3 b\u1eb1ng m\u1ed9t ghi ch\u00fa. \u0110i\u1ec1u n\u00e0y gi\u00fap s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c g\u1ecdn g\u00e0ng trong khi v\u1eabn duy tr\u00ec \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c.<\/p>\n

                    \n
                  • Lo\u1ea1i li\u00ean k\u1ebft:<\/strong>\u0110\u01b0\u1eddng d\u1eabn URL HTTP ho\u1eb7c t\u00e0i li\u1ec7u n\u1ed9i b\u1ed9.<\/li>\n
                  • Nh\u00e3n:<\/strong>Nh\u00e3n r\u00f5 r\u00e0ng cho ghi ch\u00fa (v\u00ed d\u1ee5 nh\u01b0 Xem t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 API phi\u00ean b\u1ea3n 2.1<\/strong>).<\/li>\n<\/ul>\n

                    \ud83d\udeab Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h2>\n

                    M\u1eb7c d\u00f9 th\u00eam chi ti\u1ebft l\u00e0 c\u00f3 l\u1ee3i, nh\u01b0ng qu\u00e1 t\u1ea3i s\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 khi\u1ebfn n\u00f3 tr\u1edf n\u00ean kh\u00f3 \u0111\u1ecdc. C\u00e2n b\u1eb1ng l\u00e0 ch\u00eca kh\u00f3a. H\u00e3y l\u01b0u \u00fd nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y.<\/p>\n

                      \n
                    • Qu\u00e1 nhi\u1ec1u chi ti\u1ebft tri\u1ec3n khai:<\/strong>Kh\u00f4ng vi\u1ebft logic m\u00e3 ngu\u1ed3n th\u1ef1c t\u1ebf b\u00ean trong s\u01a1 \u0111\u1ed3. H\u00e3y gi\u1eef n\u00f3 mang t\u00ednh khai b\u00e1o (n\u00f3 l\u00e0m g\u00ec), ch\u1ee9 kh\u00f4ng ph\u1ea3i mang t\u00ednh m\u1ec7nh l\u1ec7nh (n\u00f3 l\u00e0m th\u1ebf n\u00e0o).<\/li>\n
                    • K\u00fd hi\u1ec7u kh\u00f4ng nh\u1ea5t qu\u00e1n:<\/strong> \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed9i s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t k\u00fd hi\u1ec7u \u0111\u1ec3 th\u1ec3 hi\u1ec7n t\u00ednh kh\u1ea3 ki\u1ebfn, ki\u1ec3u d\u1eef li\u1ec7u v\u00e0 r\u00e0ng bu\u1ed9c.<\/li>\n
                    • T\u00ednh th\u1eeba:<\/strong>Kh\u00f4ng l\u1eb7p l\u1ea1i th\u00f4ng tin \u0111\u00e3 r\u00f5 r\u00e0ng t\u1eeb ng\u1eef c\u1ea3nh. N\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba, b\u1ea1n c\u00f3 th\u1ec3 kh\u00f4ng c\u1ea7n li\u1ec7t k\u00ea n\u00f3 tr\u1eeb khi n\u00f3 b\u1ecb ghi \u0111\u00e8.<\/li>\n
                    • B\u1ecf qua t\u00ednh kh\u1ea3 n\u0103ng null:<\/strong>Lu\u00f4n x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng n\u1ebfu tham s\u1ed1 ho\u1eb7c gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1 c\u00f3 th\u1ec3 l\u00e0 null. \u0110\u00e2y l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i th\u1eddi gian ch\u1ea1y.<\/li>\n<\/ul>\n

                      \u2705 Danh s\u00e1ch ki\u1ec3m tra c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t<\/h2>\n

                      \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n v\u1eabn h\u1eefu \u00edch v\u00e0 ch\u00ednh x\u00e1c, h\u00e3y tu\u00e2n theo danh s\u00e1ch ki\u1ec3m tra n\u00e0y khi th\u00eam chi ti\u1ebft h\u00e0nh vi.<\/p>\n\n\n\n\n\n\n\n\n\n
                      Ki\u1ec3m tra<\/th>\nT\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n
                      T\u1ea5t c\u1ea3 c\u00e1c k\u00fd hi\u1ec7u ph\u01b0\u01a1ng th\u1ee9c c\u00f3 \u0111\u1ea7y \u0111\u1ee7 kh\u00f4ng?<\/td>\n\u0110\u1ea3m b\u1ea3o c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n bi\u1ebft ch\u00ednh x\u00e1c ph\u1ea3i g\u1ecdi g\u00ec.<\/td>\n<\/tr>\n
                      C\u00e1c r\u00e0ng bu\u1ed9c c\u00f3 \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng kh\u00f4ng?<\/td>\nNg\u0103n ch\u1eb7n c\u00e1c tr\u1ea1ng th\u00e1i d\u1eef li\u1ec7u kh\u00f4ng h\u1ee3p l\u1ec7.<\/td>\n<\/tr>\n
                      C\u00e1c ngo\u1ea1i l\u1ec7 c\u00f3 \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a kh\u00f4ng?<\/td>\nH\u01b0\u1edbng d\u1eabn tri\u1ec3n khai x\u1eed l\u00fd l\u1ed7i.<\/td>\n<\/tr>\n
                      C\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 \u0111\u00fang v\u1ec1 m\u1eb7t ng\u1eef ngh\u0129a kh\u00f4ng?<\/td>\n\u0110\u1ea3m b\u1ea3o ki\u1ebfn tr\u00fac ph\u00f9 h\u1ee3p v\u1edbi logic.<\/td>\n<\/tr>\n
                      C\u00e1c ghi ch\u00fa c\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch ti\u1ebft ch\u1ebf kh\u00f4ng?<\/td>\nGi\u1eef cho s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c s\u1ea1ch s\u1ebd v\u00e0 t\u1eadp trung.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                      \ud83d\udee0\ufe0f T\u00edch h\u1ee3p v\u1edbi quy tr\u00ecnh ph\u00e1t tri\u1ec3n<\/h2>\n

                      M\u1ed9t khi s\u01a1 \u0111\u1ed3 \u0111\u00e3 \u0111\u01b0\u1ee3c b\u1ed5 sung th\u00f4ng tin, n\u00f3 ph\u1ea3i lu\u00f4n \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 v\u1edbi m\u00e3 ngu\u1ed3n. C\u00e1c s\u01a1 \u0111\u1ed3 t\u0129nh c\u00f3 th\u1ec3 nhanh ch\u00f3ng tr\u1edf n\u00ean l\u1ed7i th\u1eddi n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c duy tr\u00ec. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch \u0111\u1ec3 gi\u1eef cho ch\u00fang lu\u00f4n ph\u00f9 h\u1ee3p.<\/p>\n

                        \n
                      • Xem x\u00e9t m\u00e3 ngu\u1ed3n:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 m\u1ed9t t\u00e0i s\u1ea3n c\u00f3 th\u1ec3 xem x\u00e9t. Ki\u1ec3m tra xem c\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u1edbi c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi s\u01a1 \u0111\u1ed3 hay kh\u00f4ng.<\/li>\n
                      • T\u1ea1o t\u1ef1 \u0111\u1ed9ng:<\/strong> \u1ede nh\u1eefng n\u01a1i c\u00f3 th\u1ec3, h\u00e3y t\u1ea1o s\u01a1 \u0111\u1ed3 t\u1eeb m\u00e3 ngu\u1ed3n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c, sau \u0111\u00f3 ch\u00fa th\u00edch th\u1ee7 c\u00f4ng \u1edf nh\u1eefng n\u01a1i logic qu\u00e1 ph\u1ee9c t\u1ea1p \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a.<\/li>\n
                      • Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong> L\u01b0u tr\u1eef c\u00e1c t\u1ec7p s\u01a1 \u0111\u1ed3 c\u00f9ng v\u1edbi m\u00e3 ngu\u1ed3n. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c theo d\u00f5i l\u1ecbch s\u1eed cho c\u00e1c thay \u0111\u1ed5i thi\u1ebft k\u1ebf.<\/li>\n<\/ul>\n

                        \ud83c\udfaf Gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed9 ch\u00ednh x\u00e1c<\/h2>\n

                        \u0110\u1ea7u t\u01b0 th\u1eddi gian \u0111\u1ec3 th\u00eam c\u00e1c chi ti\u1ebft h\u00e0nh vi v\u00e0o s\u01a1 \u0111\u1ed3 l\u1edbp t\u0129nh mang l\u1ea1i l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3. N\u00f3 gi\u1ea3m th\u1eddi gian d\u00e0nh \u0111\u1ec3 l\u00e0m r\u00f5 y\u00eau c\u1ea7u trong qu\u00e1 tr\u00ecnh l\u1eadp k\u1ebf ho\u1ea1ch sprint. N\u00f3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro hi\u1ec3u nh\u1ea7m khi \u0111\u01b0a th\u00e0nh vi\u00ean m\u1edbi v\u00e0o \u0111\u1ed9i ng\u0169. N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 ngu\u1ed3n th\u00f4ng tin duy nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

                        B\u1eb1ng c\u00e1ch coi s\u01a1 \u0111\u1ed3 l\u1edbp kh\u00f4ng ch\u1ec9 l\u00e0 b\u1ea3n \u0111\u1ed3 c\u1ea5u tr\u00fac m\u00e0 c\u00f2n l\u00e0 m\u1ed9t t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 ch\u1ee9c n\u0103ng, b\u1ea1n n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u00e0i li\u1ec7u. B\u1ea1n t\u1ea1o ra m\u1ed9t t\u00e0i nguy\u00ean m\u00e0 c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 tin t\u01b0\u1edfng \u0111\u1ec3 hi\u1ec3u logic c\u1ee7a h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i t\u00ecm hi\u1ec3u m\u00e3 ngu\u1ed3n ngay l\u1eadp t\u1ee9c. S\u1ef1 ch\u00ednh x\u00e1c n\u00e0y d\u1eabn \u0111\u1ebfn \u00edt l\u1ed7i h\u01a1n, m\u00e3 ngu\u1ed3n s\u1ea1ch h\u01a1n v\u00e0 ki\u1ebfn tr\u00fac v\u1eefng ch\u1eafc h\u01a1n.<\/p>\n

                        H\u00e3y nh\u1edb r\u1eb1ng m\u1ee5c ti\u00eau l\u00e0 s\u1ef1 r\u00f5 r\u00e0ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 \u0111\u1ea7y \u0111\u1ee7. H\u00e3y bao g\u1ed3m nh\u1eefng chi ti\u1ebft quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c lu\u1ed3ng v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c. Lo\u1ea1i b\u1ecf nh\u1eefng chi ti\u1ebft nh\u1ecf nh\u1eb7t l\u00e0m r\u1ed1i m\u1eaft. V\u1edbi s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p, s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n s\u1ebd tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 giao ti\u1ebfp v\u00e0 thi\u1ebft k\u1ebf.<\/p>\n

                        \ud83d\udd0d T\u00f3m t\u1eaft c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh<\/h2>\n

                        \u0110\u1ec3 t\u00f3m l\u1ea1i, \u0111\u00e2y l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu c\u1ea7n bao g\u1ed3m khi n\u00e2ng cao s\u01a1 \u0111\u1ed3 l\u1edbp c\u1ee7a b\u1ea1n:<\/p>\n

                          \n
                        • Thao t\u00e1c:<\/strong>To\u00e0n b\u1ed9 k\u00fd hi\u1ec7u v\u1edbi tham s\u1ed1 v\u00e0 ki\u1ec3u tr\u1ea3 v\u1ec1.<\/li>\n
                        • R\u00e0ng bu\u1ed9c:<\/strong> \u0110i\u1ec1u ki\u1ec7n ti\u1ec1n nhi\u1ec7m, \u0111i\u1ec1u ki\u1ec7n h\u1eadu nghi\u1ec7m v\u00e0 b\u1ea5t bi\u1ebfn.<\/li>\n
                        • Ngo\u1ea1i l\u1ec7:<\/strong> C\u00e1c \u0111\u01b0\u1eddng d\u1eabn x\u1eed l\u00fd l\u1ed7i \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a.<\/li>\n
                        • Giao di\u1ec7n:<\/strong> H\u1ee3p \u0111\u1ed3ng tri\u1ec3n khai r\u00f5 r\u00e0ng.<\/li>\n
                        • Tr\u1ea1ng th\u00e1i:<\/strong> C\u00e1c chuy\u1ec3n ti\u1ebfp v\u00f2ng \u0111\u1eddi v\u00e0 li\u1ec7t k\u00ea.<\/li>\n
                        • Ghi ch\u00fa:<\/strong> Nh\u1eefng gi\u1ea3i th\u00edch b\u1ed1i c\u1ea3nh cho c\u00e1c logic ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n

                          Vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c th\u1ef1c h\u00e0nh n\u00e0y s\u1ebd bi\u1ebfn t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n t\u1eeb m\u1ed9t s\u1ea3n ph\u1ea9m th\u1ee5 \u0111\u1ed9ng th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 thi\u1ebft k\u1ebf ch\u1ee7 \u0111\u1ed9ng. N\u00f3 gi\u00fap c\u1ea3 \u0111\u1ed9i \u0111\u1ed3ng thu\u1eadn v\u1ec1 k\u1ef3 v\u1ecdng v\u00e0 \u0111\u1ea3m b\u1ea3o ph\u1ea7n m\u1ec1m ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang nh\u01b0 mong \u0111\u1ee3i. B\u1eaft \u0111\u1ea7u xem x\u00e9t l\u1ea1i c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7n t\u1ea1i c\u1ee7a b\u1ea1n ngay h\u00f4m nay v\u00e0 t\u00ecm ki\u1ebfm c\u01a1 h\u1ed9i \u0111\u1ec3 th\u00eam c\u00e1c l\u1edbp h\u00e0nh vi n\u00e0y.<\/p>\n","protected":false},"excerpt":{"rendered":"

                          Khi c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, n\u1ec1n t\u1ea3ng th\u01b0\u1eddng n\u1eb1m \u1edf c\u1ea5u tr\u00fac t\u0129nh. S\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd…<\/p>\n","protected":false},"author":1,"featured_media":1471,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"V\u01b0\u1ee3t ra ngo\u00e0i c\u01a1 b\u1ea3n: Chi ti\u1ebft h\u00e0nh vi trong s\u01a1 \u0111\u1ed3 l\u1edbp \ud83c\udfd7\ufe0f","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch n\u00e2ng cao c\u00e1c s\u01a1 \u0111\u1ed3 l\u1edbp UML t\u0129nh b\u1eb1ng c\u00e1c chi ti\u1ebft h\u00e0nh vi nh\u01b0 ph\u01b0\u01a1ng th\u1ee9c, r\u00e0ng bu\u1ed9c v\u00e0 tr\u1ea1ng th\u00e1i \u0111\u1ec3 c\u00f3 t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng t\u1ed1t h\u01a1n.","source_url":"","fifu_image_url":"","fifu_image_alt":"","_fifu_image_alt":"","fifu_alt":"","_fifu_alt":"","fifu_image_title":"","_fifu_image_title":"","fifu_input_alt":"","vp_image_hash":"","footnotes":""},"categories":[13],"tags":[43,45],"asset-category":[],"class_list":["post-1470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","tag-academic","tag-class-diagram"],"source_url":"","fifu_image_url":"","fifu_image_alt":"","vp_image_hash":"","yoast_head":"\nV\u01b0\u1ee3t ra ngo\u00e0i c\u01a1 b\u1ea3n: Chi ti\u1ebft h\u00e0nh vi trong s\u01a1 \u0111\u1ed3 l\u1edbp \ud83c\udfd7\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch n\u00e2ng cao c\u00e1c s\u01a1 \u0111\u1ed3 l\u1edbp UML t\u0129nh b\u1eb1ng c\u00e1c chi ti\u1ebft h\u00e0nh vi nh\u01b0 ph\u01b0\u01a1ng th\u1ee9c, r\u00e0ng bu\u1ed9c v\u00e0 tr\u1ea1ng th\u00e1i \u0111\u1ec3 c\u00f3 t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 ki\u1ebfn tr\u00fac h\u1ec7 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