{"id":50495,"date":"2023-12-17T07:52:42","date_gmt":"2023-12-17T07:52:42","guid":{"rendered":"https:\/\/masterskills.org\/blog\/cac-cau-hoi-phong-van-java-thuong-gap-ban-nen-tham-khao.html"},"modified":"2023-12-17T07:52:42","modified_gmt":"2023-12-17T07:52:42","slug":"cac-cau-hoi-phong-van-java-thuong-gap-ban-nen-tham-khao","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/cac-cau-hoi-phong-van-java-thuong-gap-ban-nen-tham-khao.html","title":{"rendered":"C\u00e1c C\u00e2u H\u1ecfi Ph\u1ecfng V\u1ea5n Java Th\u01b0\u1eddng G\u1eb7p B\u1ea1n N\u00ean Tham Kh\u1ea3o"},"content":{"rendered":"
\n

L\u00e0 m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean Java, ch\u1eafc h\u1eb3n b\u1ea1n \u0111\u00e3 h\u1ecdc r\u1ea5t nhi\u1ec1u ki\u1ebfn th\u1ee9c v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh v\u00e0 chu\u1ea9n b\u1ecb cho c\u00f4ng vi\u1ec7c sau n\u00e0y. Tuy nhi\u00ean, li\u1ec7u nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n t\u1ea1i c\u00e1c c\u00f4ng ty c\u00f3 gi\u1ed1ng v\u1edbi nh\u1eefng g\u00ec b\u1ea1n \u0111\u00e3 h\u1ecdc. <\/p>\n

H\u00e3y c\u00f9ng \u0111\u1ecdc b\u00e0i vi\u1ebft sau c\u1ee7a Masterskills v\u00e0 t\u00ecm hi\u1ec3u c\u00e1c c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java th\u01b0\u1eddng g\u1eb7p<\/strong> \u0111\u1ec3 chu\u1ea9n b\u1ecb t\u1ed1t nh\u1ea5t cho bu\u1ed5i ph\u1ecfng v\u1ea5n trong t\u01b0\u01a1ng lai nh\u00e9!<\/p>\n

C\u00e1c c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java core v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi<\/strong><\/h2>\n

JDK, JRE v\u00e0 JVM l\u00e0 g\u00ec?<\/strong><\/h3>\n

JDK l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Java Development Kit \u2013 B\u1ed9 c\u00f4ng c\u1ee5 ph\u00e1t tri\u1ec3n Java. JDK l\u00e0 m\u1ed9t b\u1ed9 c\u00f4ng c\u1ee5 ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng trong Java.\u00a0<\/p>\n

JRE l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Java Runtime Environment \u2013 M\u00f4i tr\u01b0\u1eddng th\u1ef1c thi Java. JRE bao g\u1ed3m JVM, th\u01b0 vi\u1ec7n v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n b\u1ed5 sung \u0111\u1ec3 ch\u1ea1y c\u00e1c \u1ee9ng d\u1ee5ng vi\u1ebft b\u1eb1ng ng\u00f4n ng\u1eef Java.\u00a0<\/p>\n

JVM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Java Virtual Machine \u2013 M\u00e1y \u1ea3o Java. JVM l\u00e0 m\u00e1y \u1ea3o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ea1y c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh Java. C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a JVM: Khi ch\u01b0\u01a1ng tr\u00ecnh Java \u0111\u01b0\u1ee3c ch\u1ea1y, tr\u00ecnh bi\u00ean d\u1ecbch s\u1ebd d\u1ecbch Java code th\u00e0nh bytecode v\u00e0 sau \u0111\u00f3 JVM s\u1ebd th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 c\u1ee7a m\u00ecnh: th\u00f4ng d\u1ecbch bytecode th\u00e0nh m\u00e3 m\u00e1y cho m\u00e1y t\u00ednh th\u1ef1c hi\u1ec7n l\u1ec7nh.\u00a0\u00a0<\/p>\n

Gi\u1ea3i th\u00edch ph\u01b0\u01a1ng th\u1ee9c main() trong ch\u01b0\u01a1ng tr\u00ecnh Java<\/strong><\/h3>\n

Ph\u01b0\u01a1ng th\u1ee9c main () trong ch\u01b0\u01a1ng tr\u00ecnh Java ch\u00ednh l\u00e0 \u0111i\u1ec3m th\u1ef1c thi c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh, hay c\u00f2n l\u00e0 \u0111i\u1ec3m v\u00e0o (entry point) khi th\u1ef1c hi\u1ec7n m\u1ed9t x\u1eed l\u00fd trong ch\u01b0\u01a1ng tr\u00ecnh Java. Ph\u01b0\u01a1ng th\u1ee9c main k\u1ebft th\u00fac l\u00e0 khi ch\u01b0\u01a1ng tr\u00ecnh k\u1ebft th\u00fac v\u00e0 ph\u01b0\u01a1ng th\u1ee9c main l\u00e0 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 cho c\u00e1c ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c c\u00f3 th\u1ec3 th\u1ef1c thi.\u00a0<\/p>\n

L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 g\u00ec?<\/strong><\/h3>\n

L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh m\u00e1y t\u00ednh t\u1ed5 ch\u1ee9c thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m xung quanh d\u1eef li\u1ec7u ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng thao t\u00e1c, thay v\u00ec ch\u1ee9c n\u0103ng v\u00e0 logic \u0111\u1ec3 thao t\u00e1c ch\u00fang.\u00a0<\/p>\n

C\u00e1c nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/strong><\/h3>\n

L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd sau:<\/p>\n

    \n
  • Encapsulation \u2013 T\u00ednh \u0111\u00f3ng g\u00f3i: Nguy\u00ean l\u00fd n\u00e0y n\u00f3i r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c th\u00f4ng tin quan tr\u1ecdng \u0111\u01b0\u1ee3c ch\u1ee9a b\u00ean trong m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 ch\u1ec9 nh\u1eefng th\u00f4ng tin \u0111\u01b0\u1ee3c ch\u1ecdn m\u1edbi \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb. Vi\u1ec7c tri\u1ec3n khai v\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a t\u1eebng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c gi\u1eef ri\u00eang b\u00ean trong m\u1ed9t l\u1edbp \u0111\u00e3 x\u00e1c \u0111\u1ecbnh. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c kh\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o l\u1edbp n\u00e0y ho\u1eb7c quy\u1ec1n th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i. H\u1ecd ch\u1ec9 c\u00f3 th\u1ec3 g\u1ecdi m\u1ed9t danh s\u00e1ch c\u00e1c h\u00e0m ho\u1eb7c ph\u01b0\u01a1ng th\u1ee9c c\u00f4ng khai. \u0110\u1eb7c t\u00ednh \u1ea9n d\u1eef li\u1ec7u n\u00e0y gi\u00fap b\u1ea3o m\u1eadt ch\u01b0\u01a1ng tr\u00ecnh t\u1ed1t h\u01a1n v\u00e0 tr\u00e1nh l\u00e0m h\u1ecfng d\u1eef li\u1ec7u ngo\u00e0i \u00fd mu\u1ed1n.<\/li>\n
  • Abstraction \u2013 T\u00ednh tr\u1eebu t\u01b0\u1ee3ng: C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ec9 ti\u1ebft l\u1ed9 c\u00e1c c\u01a1 ch\u1ebf b\u00ean trong c\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c, \u1ea9n m\u1ecdi m\u00e3 tri\u1ec3n khai kh\u00f4ng c\u1ea7n thi\u1ebft. L\u1edbp d\u1eabn xu\u1ea5t c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3. Kh\u00e1i ni\u1ec7m n\u00e0y c\u00f3 th\u1ec3 gi\u00fap c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i ho\u1eb7c b\u1ed5 sung b\u1ed5 sung theo th\u1eddi gian.<\/li>\n
  • Inheritance \u2013 T\u00ednh k\u1ebf th\u1eeba: C\u00e1c l\u1edbp c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 t\u1eeb c\u00e1c l\u1edbp kh\u00e1c. M\u1ed1i quan h\u1ec7 v\u00e0 c\u00e1c l\u1edbp con gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng l\u1ea1i logic chung trong khi v\u1eabn duy tr\u00ec m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p duy nh\u1ea5t. Thu\u1ed9c t\u00ednh n\u00e0y c\u1ee7a OOP bu\u1ed9c ph\u1ea3i ph\u00e2n t\u00edch d\u1eef li\u1ec7u k\u1ef9 l\u01b0\u1ee1ng h\u01a1n, gi\u1ea3m th\u1eddi gian ph\u00e1t tri\u1ec3n v\u00e0 \u0111\u1ea3m b\u1ea3o m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n.<\/li>\n
  • Polymorphism \u2013 T\u00ednh \u0111a h\u00ecnh. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 chia s\u1ebb c\u00e1c h\u00e0nh vi v\u00e0 ch\u00fang c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u d\u1ea1ng. Ch\u01b0\u01a1ng tr\u00ecnh s\u1ebd x\u00e1c \u0111\u1ecbnh \u00fd ngh\u0129a ho\u1eb7c c\u00e1ch s\u1eed d\u1ee5ng n\u00e0o l\u00e0 c\u1ea7n thi\u1ebft cho m\u1ed7i l\u1ea7n th\u1ef1c thi \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3 t\u1eeb l\u1edbp cha, gi\u00fap gi\u1ea3m nhu c\u1ea7u sao ch\u00e9p m\u00e3. Sau \u0111\u00f3, m\u1ed9t l\u1edbp con \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng c\u1ee7a l\u1edbp cha. T\u00ednh \u0111a h\u00ecnh cho ph\u00e9p c\u00e1c lo\u1ea1i \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau \u0111i qua c\u00f9ng m\u1ed9t giao di\u1ec7n.<\/li>\n<\/ul>\n

    T\u1ea1i sao Java kh\u00f4ng ph\u1ea3i l\u00e0 h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng 100%?<\/strong><\/h3>\n

    Java kh\u00f4ng ph\u1ea3i l\u00e0 ng\u00f4n ng\u1eef h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n v\u00ec Java c\u00f3 s\u1eed d\u1ee5ng c\u1ea3 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u kh\u00e1c nh\u01b0 byte, char, float, v.v.\u00a0<\/p>\n

    T\u1ea1i sao Java l\u1ea1i \u0111\u1ed9c l\u1eadp n\u1ec1n t\u1ea3ng?<\/strong><\/h3>\n

    Java \u0111\u1ed9c l\u1eadp n\u1ec1n t\u1ea3ng l\u00e0 do Java s\u1eed d\u1ee5ng JVM, m\u00e1y \u1ea3o Javacung c\u1ea5p c\u00e1ch th\u1ef1c thi m\u00e3 Java \u0111\u1ed9c l\u1eadp v\u1edbi n\u1ec1n t\u1ea3ng.\u00a0<\/p>\n

    \"ph\u1ecfng
    Nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java th\u01b0\u1eddng g\u1eb7p.<\/figcaption><\/figure>\n

    Constructors trong Java l\u00e0 g\u00ec?<\/strong><\/h3>\n

    Constructors (H\u00e0m \u1ea3o) trong Java l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi t\u1ea1o, tr\u1ea3 v\u1ec1 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp. Th\u00f4ng th\u01b0\u1eddng, m\u1ed9t Constructors s\u1ebd tr\u00f9ng t\u00ean v\u1edbi l\u1edbp m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a.\u00a0<\/p>\n

    C\u00e1c l\u1edbp wrapper trong Java l\u00e0 g\u00ec?<\/strong><\/h3>\n

    L\u1edbp wrapper trong Java l\u00e0 l\u1edbp \u0111\u00f3ng g\u00f3i c\u00e1c ki\u1ec3u, cung c\u1ea5p c\u01a1 ch\u1ebf chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u nguy\u00ean th\u1ee7y tr\u1edf th\u00e0nh ki\u1ec3u \u0111\u1ed1i t\u01b0\u1ee3ng, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. .<\/p>\n

    T\u1ea1i sao kh\u00f4ng s\u1eed d\u1ee5ng con tr\u1ecf trong Java?<\/strong><\/h3>\n

    Con tr\u1ecf kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong Java v\u00ec con tr\u1ecf kh\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 kh\u00f4ng an to\u00e0n.\u00a0<\/p>\n

    So s\u00e1nh ArrayList v\u00e0 Vector trong Java<\/strong><\/h3>\n

    Gi\u1ed1ng nhau:<\/p>\n

      \n
    • \u0110\u1ec1u c\u00e0i \u0111\u1eb7t interface list<\/li>\n
    • Hashtable v\u00e0 HashMap duy tr\u00ec theo th\u1ee9 t\u1ef1 ch\u00e8n c\u00e1c ph\u1ea7n t\u1eed<\/li>\n<\/ul>\n

      Kh\u00e1c nhau:<\/p>\n

      \n\n\n\n\n\n\n\n\n\n
      C\u01a1 s\u1edf so s\u00e1nh<\/strong><\/td>\nVector<\/strong><\/td>\nArrayList<\/strong><\/td>\n<\/tr>\n
      C\u0103n b\u1ea3n<\/td>\nL\u1edbp Vector s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/td>\nL\u1edbp ArrayList s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/td>\n<\/tr>\n
      L\u1edbp k\u1ebf th\u1eeba<\/td>\nVector l\u00e0 m\u1ed9t l\u1edbp k\u1ebf th\u1eeba, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf l\u1ea1i \u0111\u1ec3 h\u1ed7 tr\u1ee3 l\u1edbp Collection.<\/td>\nArrayList l\u00e0 m\u1ed9t l\u1edbp Collection ti\u00eau chu\u1ea9n.<\/td>\n<\/tr>\n
      Tuy\u00ean b\u1ed1 l\u1edbp<\/td>\nVector<\/td>\nArrayList<\/td>\n<\/tr>\n
      T\u00e1i ph\u00e2n b\u1ed5<\/td>\nKhi kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, Vector t\u0103ng l\u00ean g\u1ea5p \u0111\u00f4i k\u00edch th\u01b0\u1edbc<\/td>\nKhi kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, ArrayList t\u0103ng th\u00eam m\u1ed9t n\u1eeda k\u00edch th\u01b0\u1edbc<\/td>\n<\/tr>\n
      Hi\u1ec7u su\u1ea5t<\/td>\nKhi Vector \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a,Vector ho\u1ea1t \u0111\u1ed9ng ch\u1eadm h\u01a1n ArrayList.<\/td>\nV\u00ec ArrayList kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a, ArrayList ho\u1ea1t \u0111\u1ed9ng nhanh h\u01a1n Vector.<\/td>\n<\/tr>\n
      B\u1ea3ng li\u1ec7t k\u00ea \/ l\u1eb7p<\/td>\nVector s\u1eed d\u1ee5ng Enumutions v\u00e0 giao di\u1ec7n Iterator \u0111\u1ec3 duy\u1ec7t qua c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong Vector.<\/td>\nArrayList s\u1eed d\u1ee5ng giao di\u1ec7n Iterator \u0111\u1ec3 duy\u1ec7t qua c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong ArrayList.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

      Kh\u00e1c bi\u1ec7t gi\u1eefa equals() v\u00e0 == trong Java<\/strong><\/h3>\n
        \n
      • Equals() l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c so s\u00e1nh 2 object tuy nhi\u00ean ch\u1ec9 so s\u00e1nh v\u1ec1 m\u1eb7t gi\u00e1 tr\u1ecb c\u1ee7a ch\u00fang. Trong ph\u00e9p so s\u00e1nh equals(), n\u1ebfu \u0111\u00fang s\u1ebd tr\u1ea3 v\u1ec1 true, sai s\u1ebd tr\u1ea3 v\u1ec1 false.<\/li>\n
      • == l\u00e0 ph\u00e9p so s\u00e1nh 2 object c\u00f3 \u0111ang c\u00f9ng tr\u1ecf v\u00e0o m\u1ed9t \u00f4 nh\u1edb hay kh\u00f4ng. Trong ph\u00e9p ==, k\u1ebft qu\u1ea3 \u0111\u00fang s\u1ebd tr\u1ea3 v\u1ec1 true, sai v\u1ec1 false.\u00a0<\/li>\n<\/ul>\n

        Package trong Java l\u00e0 g\u00ec? Li\u1ec7t k\u00ea nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a c\u00e1c package<\/strong><\/h3>\n

        Package trong Java l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c l\u1edbp (class), giao di\u1ec7n (interface) v\u00e0 c\u00e1c package con t\u01b0\u01a1ng t\u1ef1. Package th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh 2 lo\u1ea1i:<\/p>\n

          \n
        • Package \u0111\u01b0\u1ee3c d\u1ef1ng s\u1eb5n<\/li>\n
        • Package do ng\u01b0\u1eddi d\u00f9ng \u0111\u1ecbnh ngh\u0129a\u00a0<\/li>\n<\/ul>\n

          \u01afu \u0111i\u1ec3m c\u1ee7a c\u00e1c package:<\/p>\n

            \n
          • T\u1ed5 ch\u1ee9c file (class, interface) theo m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ec3 d\u1ec5 d\u00e0ng ph\u00e2n lo\u1ea1i file.<\/li>\n
          • Ph\u00e2n quy\u1ec1n truy c\u1eadp gi\u00fap xem c\u00e1c class thu\u1ed9c package n\u00e0o khi \u0111\u01b0\u1ee3c g\u1ecdi \u1edf ph\u1ea7n access modifier.<\/li>\n
          • D\u1ec5 d\u00e0ng ch\u1ecdn l\u1ecdc khi import. D\u00f9ng l\u1ec7nh import java.sql khi import t\u1ea5t c\u1ea3 c\u00e1c class. D\u00f9ng l\u1ec7nh import.util.regex khi s\u1eed d\u1ee5ng class n\u1eb1m trong package regex.\u00a0<\/li>\n<\/ul>\n

            Kh\u00e1c bi\u1ec7t gi\u1eefa b\u1ed9 nh\u1edb Stack v\u00e0 Heap<\/strong><\/h3>\n

            V\u1ec1 k\u00edch th\u01b0\u1edbc v\u00f9ng nh\u1edb<\/p>\n

              \n
            • B\u1ed9 nh\u1edb Stack: c\u00f3 k\u00edch th\u01b0\u1edbc c\u1ed1 \u0111\u1ecbnh t\u00f9y thu\u1ed9c v\u00e0o h\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/li>\n
            • B\u1ed9 nh\u1edb Heap: c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00f4ng c\u1ed1 \u0111\u1ecbnh, c\u00f3 th\u1ec3 t\u0103ng gi\u1ea3m t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u<\/li>\n<\/ul>\n

              V\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m v\u00f9ng nh\u1edb<\/p>\n

                \n
              • B\u1ed9 nh\u1edb Stack: V\u00f9ng nh\u1edb \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng h\u1ec7 \u0111i\u1ec1u h\u00e0nh, d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u s\u1ebd t\u1ef1 \u0111\u1ed9ng h\u1ee7y sau khi h\u00e0m th\u1ef1c hi\u1ec7n xong nhi\u1ec7m v\u1ee5 c\u1ee7a m\u00ecnh.<\/li>\n
              • B\u1ed9 nh\u1edb Heap: V\u00f9ng nh\u1edb \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng l\u1eadp tr\u00ecnh vi\u00ean v\u00e0 c\u00e1c d\u1eef li\u1ec7u s\u1ebd kh\u00f4ng b\u1ecb h\u1ee7y sau khi h\u00e0m th\u1ef1c hi\u1ec7n xong v\u00e0 l\u1eadp tr\u00ecnh vi\u00ean ph\u1ea3i t\u1ef1 h\u1ee7y v\u00f9ng nh\u1edb.\u00a0<\/li>\n<\/ul>\n

                L\u1ed7i x\u1ea3y ra v\u1edbi v\u00f9ng nh\u1edb<\/p>\n

                  \n
                • B\u1ed9 nh\u1edb Stack: C\u00f3 kh\u1ea3 n\u0103ng v\u01b0\u1ee3t qu\u00e1 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef v\u00ec dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb Stack ch\u1ec9 c\u00f3 h\u1ea1n.<\/li>\n
                • B\u1ed9 nh\u1edb Heap: C\u0169ng c\u00f3 kh\u1ea3 n\u0103ng tr\u00e0n v\u00f9ng nh\u1edb n\u1ebfu b\u1ea1n li\u00ean t\u1ee5c c\u1ea5p ph\u00e1t v\u00f9ng nh\u1edb m\u00e0 kh\u00f4ng gi\u1ea3i ph\u00f3ng th\u01b0\u1eddng xuy\u00ean.\u00a0<\/li>\n<\/ul>\n

                  C\u00e1c lo\u1ea1i ph\u1ea1m vi truy c\u1eadp trong Java<\/strong><\/h3>\n

                  C\u00f3 4 ph\u1ea1m vi truy c\u1eadp trong Java l\u00e0 public, private, default v\u00e0 protected.\u00a0<\/p>\n

                    \n
                  • Public: C\u00f3 th\u1ec3 truy c\u1eadp m\u1ecdi l\u00fac m\u1ecdi n\u01a1i<\/li>\n
                  • Private: Ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong l\u1edbp<\/li>\n
                  • Default: C\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb trong l\u1edbp khai b\u00e1o, c\u00e1c l\u1edbp c\u00f9ng m\u1ed9t g\u00f3i v\u1edbi l\u1edbp khai b\u00e1o<\/li>\n
                  • Protected: C\u00f3 th\u1ec3 truy c\u1eadp trong l\u1edbp khai b\u00e1o, c\u00e1c l\u1edbp con c\u1ee7a l\u1edbp khai b\u00e1o, c\u00e1c l\u1edbp c\u00f9ng m\u1ed9t g\u00f3i v\u1edbi l\u1edbp khai b\u00e1o<\/li>\n<\/ul>\n

                    Tr\u00ecnh bi\u00ean d\u1ecbch JIT trong Java<\/strong><\/h3>\n

                    Tr\u00ecnh bi\u00ean d\u1ecbch JIT trong Java hay c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u00ean g\u1ecdi Just-In-Time \u2013 l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt bi\u00ean d\u1ecbch c\u00e1c ph\u1ea7n m\u00e3 byte c\u00f3 c\u00e1c ch\u1ee9c n\u0103ng t\u01b0\u01a1ng t\u1ef1 trong c\u00f9ng m\u1ed9t th\u1eddi gian, qua \u0111\u00f3 gi\u1ea3m th\u1eddi gian bi\u00ean d\u1ecbch c\u1ea7n thi\u1ebft.\u00a0<\/p>\n

                    N\u00eau \u0111\u1ecbnh ngh\u0129a m\u1ed9t class<\/strong><\/h3>\n

                    Class \u0111\u1ea1i di\u1ec7n cho c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c chung cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp. Trong Java, class l\u00e0 ki\u1ec3u d\u1eef li\u1ec7u do l\u1eadp tr\u00ecnh vi\u00ean t\u1ef1 t\u1ea1o ra.\u00a0<\/p>\n

                    \n
                    \"cau
                    H\u1ecdc c\u00e1ch tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java \u0111\u1ec3 ph\u1ecfng v\u1ea5n hi\u1ec7u qu\u1ea3.<\/figcaption><\/figure>\n<\/div>\n

                    H\u00e3y n\u00eau s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa bi\u1ebfn local v\u00e0 bi\u1ebfn instance<\/strong><\/h3>\n

                    Bi\u1ebfn local:<\/p>\n

                      \n
                    • \u0110\u01b0\u1ee3c khai b\u00e1o trong h\u00e0m contructor, trong block ho\u1eb7c trong c\u00e1c ph\u01b0\u01a1ng th\u1ee9c<\/li>\n
                    • \u0110\u01b0\u1ee3c t\u1ea1o trong c\u00e1c ph\u01b0\u01a1ng th\u1ee9c, contructor v\u00e0 block. B\u1ecb ph\u00e1 h\u1ee7y khi k\u1ebft th\u00fac ph\u01b0\u01a1ng th\u1ee9c, contructor v\u00e0 block.<\/li>\n
                    • \u0110\u01b0\u1ee3c l\u01b0u tr\u00ean v\u00f9ng nh\u1edb stack<\/li>\n
                    • Kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng access modifier khi khai b\u00e1o<\/li>\n
                    • C\u1ea7n kh\u1edfi t\u1ea1o gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng\u00a0<\/li>\n<\/ul>\n

                      Bi\u1ebfn instance:<\/p>\n

                        \n
                      • \u0110\u01b0\u1ee3c khai b\u00e1o trong m\u1ed9t l\u1edbp, ngo\u00e0i ph\u01b0\u01a1ng th\u1ee9c, contructor v\u00e0 block<\/li>\n
                      • \u0110\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb heap<\/li>\n
                      • \u0110\u01b0\u1ee3c t\u1ea1o khi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng n\u00fat \u201cnew\u201d v\u00e0 b\u1ecb ph\u00e1 h\u1ee7y khi \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb ph\u00e1 h\u1ee7y<\/li>\n
                      • \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi ph\u01b0\u01a1ng th\u1ee9c, contructor, block, tuy nhi\u00ean ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng qua m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee5 th\u1ec3<\/li>\n
                      • Gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh ph\u1ee5 thu\u1ed9c v\u00e0o ki\u1ec3u d\u1eef li\u1ec7u<\/li>\n
                      • C\u00f3 th\u1ec3 g\u1ecdi tr\u1ef1c ti\u1ebfp b\u1eb1ng t\u00ean khi s\u1eed d\u1ee5ng trong class\u00a0<\/li>\n<\/ul>\n

                        S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ea3ng v\u00e0 ArrayList<\/strong><\/h3>\n

                        Array (M\u1ea3ng) l\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u c\u00f3 k\u00edch th\u01b0\u1edbc c\u1ed1 \u0111\u1ecbnh.<\/p>\n

                        ArrayList l\u00e0 l\u1edbp collection c\u00f3 th\u1ec3 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc.<\/p>\n

                        T\u1eeb kh\u00f3a final trong Java l\u00e0 g\u00ec?<\/strong><\/h3>\n

                        T\u1eeb kh\u00f3a final trong Java l\u00e0 t\u1eeb kh\u00f3a \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng. L\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u1edf nhi\u1ec1u ng\u1eef c\u1ea3nh: ph\u01b0\u01a1ng th\u1ee9c, bi\u1ebfn, l\u1edbp.<\/p>\n

                        T\u1eeb kh\u00f3a static trong Java l\u00e0 g\u00ec?<\/strong><\/h3>\n

                        Static trong Java l\u00e0 t\u1eeb kh\u00f3a d\u00f9ng \u0111\u1ec3 qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb v\u00e0 truy c\u1eadp tr\u1ef1c ti\u1ebfp th\u00f4ng qua l\u1edbp khi kh\u00f4ng c\u1ea7n kh\u1edfi t\u1ea1o.\u00a0<\/p>\n

                        T\u1eeb kh\u00f3a super trong Java<\/strong><\/h3>\n

                        Super trong Java l\u00e0 m\u1ed9t bi\u1ebfn tham chi\u1ebfu, d\u00f9ng \u0111\u1ec3 tham chi\u1ebfu \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp cha g\u1ea7n nh\u1ea5t m\u1ed9t c\u00e1ch tr\u1ef1c ti\u1ebfp.\u00a0<\/p>\n

                        M\u00f4 t\u1ea3 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa String, StringBuilder v\u00e0 StringBuffer<\/strong><\/h3>\n
                          \n
                        • String kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i v\u00e0 kh\u00f4ng th\u1ec3 c\u00f3 class con<\/li>\n
                        • StringBuffer v\u00e0 StringBuilder c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c<\/li>\n
                        • StringBuffer v\u00e0 StringBuilder gi\u1ed1ng nhau, ch\u1ec9 c\u00f3 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t khi s\u1eed d\u1ee5ng \u0111a lu\u1ed3ng<\/li>\n
                        • V\u1ec1 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd: StringBuilder l\u00e0 t\u1ed1t nh\u1ea5t sau \u0111\u00f3 \u0111\u1ebfn StringBuffer v\u00e0 String.\u00a0<\/li>\n<\/ul>\n

                          M\u00f4 t\u1ea3 kh\u00e1c bi\u1ec7t gi\u1eefa constructor v\u00e0 ph\u01b0\u01a1ng th\u1ee9c trong Java<\/strong><\/h3>\n
                          \n\n\n\n\n\n\n\n\n
                          Constructor<\/strong><\/td>\nPh\u01b0\u01a1ng th\u1ee9c<\/strong><\/td>\n<\/tr>\n
                          \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi t\u1ea1o tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td>\n\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ec3 hi\u1ec7n h\u00e0nh \u0111\u1ed9ng c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td>\n<\/tr>\n
                          Kh\u00f4ng c\u00f3 ki\u1ec3u tr\u1ea3 v\u1ec1.<\/td>\nC\u00f3 ki\u1ec3u tr\u1ea3 v\u1ec1.<\/td>\n<\/tr>\n
                          Constructor \u0111\u01b0\u1ee3c g\u1ecdi ng\u1ea7m.<\/td>\nPh\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c g\u1ecdi t\u01b0\u1eddng minh.<\/td>\n<\/tr>\n
                          JIT t\u1ea1o ra constructor m\u1eb7c \u0111\u1ecbnh n\u1ebfu b\u1ea1n kh\u00f4ng c\u00f3 constructor n\u00e0o.<\/td>\nPh\u01b0\u01a1ng th\u1ee9c kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi JIT.<\/td>\n<\/tr>\n
                          T\u00ean c\u1ee7a constructor ph\u1ea3i gi\u1ed1ng t\u00ean l\u1edbp.<\/td>\nT\u00ean ph\u01b0\u01a1ng th\u1ee9c c\u00f3 th\u1ec3 gi\u1ed1ng ho\u1eb7c kh\u00e1c t\u00ean l\u1edbp.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>
                          C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java.<\/figcaption><\/figure>\n

                          S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa t\u1eeb kh\u00f3a break v\u00e0 continue<\/strong><\/h3>\n

                          T\u1eeb kh\u00f3a break d\u00f9ng \u0111\u1ec3 tho\u00e1t ra kh\u1ecfi v\u00f2ng l\u1eb7p ngay l\u1eadp t\u1ee9c v\u00e0 chuy\u1ec3n sang c\u00e2u l\u1ec7nh ti\u1ebfp theo, \u1edf ngo\u00e0i v\u00f2ng l\u1eb7p v\u1eeba k\u1ebft th\u00fac.<\/p>\n

                          T\u1eeb kh\u00f3a continue \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ec9 vi\u1ec7c v\u00f2ng l\u1eb7p k\u1ebf ti\u1ebfp s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n.\u00a0<\/p>\n

                          Collection trong Java l\u00e0 g\u00ec, li\u1ec7t k\u00ea c\u00e1c interface v\u00e0 class c\u1ee7a n\u00f3<\/strong><\/h3>\n

                          Collection trong Java l\u00e0 khu\u00f4n kh\u1ed5 cung c\u1ea5p ki\u1ebfn tr\u00fac l\u01b0u tr\u1eef v\u00e0 thao t\u00e1c t\u1edbi nh\u00f3m \u0111\u1ed1i t\u01b0\u1ee3ng. B\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c ho\u1ea1t \u0111\u1ed9ng nh\u01b0 t\u00ecm ki\u1ebfm, ch\u00e8n, ph\u00e2n lo\u1ea1i, v.v, tr\u00ean m\u1ed9t d\u1eef li\u1ec7u nh\u1edd Java Collection.\u00a0<\/p>\n

                          C\u00e1c interface c\u1ee7a Java Collection: Set, List, Queue, Deque, v.v.<\/p>\n

                          C\u00e1c class c\u1ee7a Java Collection: ArrayList, Vector, LinkedList, HashSet, PriorityQueue, v.v.\u00a0<\/p>\n

                          C\u00f3 m\u1ea5y lo\u1ea1i access modifier? Ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau gi\u1eefa ch\u00fang?<\/strong><\/h3>\n

                          C\u00f3 4 lo\u1ea1i access modifier l\u00e0: private, default, protected, public. Trong \u0111\u00f3:<\/p>\n

                            \n
                          • Public: C\u00f3 th\u1ec3 truy c\u1eadp \u1edf b\u1ea5t c\u1ee9 \u0111\u00e2u.<\/li>\n
                          • Private: Ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp trong c\u00f9ng class.<\/li>\n
                          • Default: C\u00f3 th\u1ec3 truy c\u1eadp trong c\u00f9ng class v\u00e0 c\u00f9ng package.<\/li>\n
                          • Protected: C\u00f3 th\u1ec3 truy c\u1eadp trong c\u00f9ng class, package v\u00e0 ngo\u00e0i package b\u1edfi l\u1edbp con.<\/li>\n<\/ul>\n

                            T\u00ednh \u0111a h\u00ecnh l\u00e0 g\u00ec?<\/strong><\/h3>\n

                            Polymorphism \u2013 T\u00ednh \u0111a h\u00ecnh. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 chia s\u1ebb c\u00e1c h\u00e0nh vi v\u00e0 ch\u00fang c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u d\u1ea1ng. Ch\u01b0\u01a1ng tr\u00ecnh s\u1ebd x\u00e1c \u0111\u1ecbnh \u00fd ngh\u0129a ho\u1eb7c c\u00e1ch s\u1eed d\u1ee5ng n\u00e0o l\u00e0 c\u1ea7n thi\u1ebft cho m\u1ed7i l\u1ea7n th\u1ef1c thi \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3 t\u1eeb l\u1edbp cha, gi\u00fap gi\u1ea3m nhu c\u1ea7u sao ch\u00e9p m\u00e3. <\/p>\n

                            Sau \u0111\u00f3, m\u1ed9t l\u1edbp con \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng c\u1ee7a l\u1edbp cha. T\u00ednh \u0111a h\u00ecnh cho ph\u00e9p c\u00e1c lo\u1ea1i \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau \u0111i qua c\u00f9ng m\u1ed9t giao di\u1ec7n.<\/p>\n

                            \n
                            \"nh\u1eefng
                            C\u00e1ch tr\u1ea3 l\u1eddi nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java.<\/figcaption><\/figure>\n<\/div>\n

                            Th\u1ebf n\u00e0o l\u00e0 final?<\/strong><\/h3>\n

                            Final l\u00e0 thu\u1ed9c t\u00ednh m\u00e0 ch\u00fang s\u1ebd kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i gi\u00e1 tr\u1ecb. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c final kh\u00f4ng th\u1ec3 overide \u1edf l\u1edbp con v\u00e0 c\u00e1c class final kh\u00f4ng th\u1ec3 k\u1ebf th\u1eeba.\u00a0<\/p>\n

                            C\u00f3 b\u1eaft bu\u1ed9c ph\u1ea3i khai b\u00e1o constructor trong l\u1edbp?<\/strong><\/h3>\n

                            Kh\u00f4ng b\u1eaft bu\u1ed9c ph\u1ea3i khai b\u00e1o constructor trong l\u1edbp. N\u1ebfu kh\u00f4ng khai b\u00e1o, l\u1edbp s\u1ebd d\u00f9ng default constructor.\u00a0<\/p>\n

                            L\u1eddi k\u1ebft\u00a0<\/strong><\/h2>\n

                            Tr\u00ean \u0111\u00e2y ch\u00fang ta \u0111\u00e3 c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java<\/strong> th\u01b0\u1eddng g\u1eb7p trong c\u00e1c bu\u1ed5i ph\u1ecfng v\u1ea5n. B\u1ea1n h\u00e3y tham kh\u1ea3o nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ef1 tin h\u01a1n khi \u0111\u1ed1i di\u1ec7n v\u1edbi nh\u00e0 tuy\u1ec3n d\u1ee5ng nh\u00e9.\u00a0<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                            L\u00e0 m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean Java, ch\u1eafc h\u1eb3n b\u1ea1n \u0111\u00e3 h\u1ecdc r\u1ea5t nhi\u1ec1u ki\u1ebfn th\u1ee9c v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh v\u00e0 chu\u1ea9n b\u1ecb cho c\u00f4ng vi\u1ec7c sau n\u00e0y. Tuy nhi\u00ean, li\u1ec7u nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n t\u1ea1i c\u00e1c c\u00f4ng ty c\u00f3 gi\u1ed1ng v\u1edbi nh\u1eefng g\u00ec b\u1ea1n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[181],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/50495"}],"collection":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/comments?post=50495"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/50495\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=50495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=50495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=50495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}