{"id":2416,"date":"2022-08-15T08:23:08","date_gmt":"2022-08-15T08:23:08","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=2416"},"modified":"2023-03-14T01:59:04","modified_gmt":"2023-03-14T01:59:04","slug":"java-fresher","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/java-fresher\/","title":{"rendered":"13 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java fresher ph\u1ed5 bi\u1ebfn c\u00f3 \u0111\u00e1p \u00e1n"},"content":{"rendered":"\n<p>V\u1ecb tr\u00ed <strong><a href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java fresher<\/a><\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c kh\u00e1 nhi\u1ec1u b\u1ea1n tr\u1ebb, c\u00e1c b\u1ea1n sinh vi\u00ean m\u1edbi ra tr\u01b0\u1eddng quan t\u00e2m. N\u1ebfu b\u1ea1n s\u1eafp c\u00f3 bu\u1ed5i ph\u1ecfng v\u1ea5n v\u1ecb tr\u00ed n\u00e0y, 13 c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p b\u1edfi<strong> <\/strong><a href=\"https:\/\/topviecit.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopviecIT<\/strong><\/a> sau \u0111\u00e2y s\u1ebd h\u1eefu \u00edch cho b\u1ea1n.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_1_Lap_trinh_Java_duoc_phat_trien_boi_hang_nao\" title=\"C\u00e2u 1: L\u1eadp tr\u00ecnh Java \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi h\u00e3ng n\u00e0o?\">C\u00e2u 1: L\u1eadp tr\u00ecnh Java \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi h\u00e3ng n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_2_Hien_tai_Java_dang_duoc_ho_tro_tren_nhung_nen_tang_nao\" title=\"C\u00e2u 2: Hi\u1ec7n t\u1ea1i, Java \u0111ang \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 tr\u00ean nh\u1eefng n\u1ec1n t\u1ea3ng n\u00e0o?\">C\u00e2u 2: Hi\u1ec7n t\u1ea1i, Java \u0111ang \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 tr\u00ean nh\u1eefng n\u1ec1n t\u1ea3ng n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_3_Hay_phan_biet_ve_Java_va_Java_Core\" title=\"C\u00e2u 3: H\u00e3y ph\u00e2n bi\u1ec7t v\u1ec1 Java v\u00e0 Java Core?\">C\u00e2u 3: H\u00e3y ph\u00e2n bi\u1ec7t v\u1ec1 Java v\u00e0 Java Core?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_4_Hay_liet_ke_5_dac_diem_ma_Java_fresher_nen_biet_ve_Java\" title=\"C\u00e2u 4: H\u00e3y li\u1ec7t k\u00ea 5 \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 Java fresher n\u00ean bi\u1ebft v\u1ec1 Java?\">C\u00e2u 4: H\u00e3y li\u1ec7t k\u00ea 5 \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 Java fresher n\u00ean bi\u1ebft v\u1ec1 Java?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_5_Trong_Java_doi_tuong_duoc_hieu_nhu_the_nao\" title=\"C\u00e2u 5: Trong Java, \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 th\u1ebf n\u00e0o?\">C\u00e2u 5: Trong Java, \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_6_Phan_biet_su_khac_nhau_giua_lop_Nested_Class_va_Inner_Class\" title=\"C\u00e2u 6: Ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau gi\u1eefa l\u1edbp Nested Class v\u00e0 Inner Class?\">C\u00e2u 6: Ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau gi\u1eefa l\u1edbp Nested Class v\u00e0 Inner Class?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_7_Ban_hieu_the_nao_ve_Checked_Exception\" title=\"C\u00e2u 7: B\u1ea1n hi\u1ec3u th\u1ebf n\u00e0o v\u1ec1 Checked Exception?\">C\u00e2u 7: B\u1ea1n hi\u1ec3u th\u1ebf n\u00e0o v\u1ec1 Checked Exception?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_8_Gui_phuong_thuc_dong_trong_Java_la_gi\" title=\"C\u00e2u 8: G\u1eedi ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed9ng trong Java l\u00e0 g\u00ec?\">C\u00e2u 8: G\u1eedi ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed9ng trong Java l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_9_Neu_hieu_biet_cua_ban_ve_tinh_ke_thua_trong_Java\" title=\"C\u00e2u 9: N\u00eau hi\u1ec3u bi\u1ebft c\u1ee7a b\u1ea1n v\u1ec1 t\u00ednh k\u1ebf th\u1eeba trong Java?\">C\u00e2u 9: N\u00eau hi\u1ec3u bi\u1ebft c\u1ee7a b\u1ea1n v\u1ec1 t\u00ednh k\u1ebf th\u1eeba trong Java?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_10_Neu_hieu_biet_ve_loi_ich_cua_tinh_bao_dong_trong_Java\" title=\"C\u00e2u 10: N\u00eau hi\u1ec3u bi\u1ebft v\u1ec1 l\u1ee3i \u00edch c\u1ee7a t\u00ednh bao \u0111\u00f3ng trong Java?\">C\u00e2u 10: N\u00eau hi\u1ec3u bi\u1ebft v\u1ec1 l\u1ee3i \u00edch c\u1ee7a t\u00ednh bao \u0111\u00f3ng trong Java?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_11_The_nao_la_Spring_trong_Java_Co_may_phien_ban\" title=\"C\u00e2u 11: Th\u1ebf n\u00e0o l\u00e0 Spring trong Java? C\u00f3 m\u1ea5y phi\u00ean b\u1ea3n?\">C\u00e2u 11: Th\u1ebf n\u00e0o l\u00e0 Spring trong Java? C\u00f3 m\u1ea5y phi\u00ean b\u1ea3n?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_12_Java_8_co_nhung_tinh_nang_nao_can_luu_y\" title=\"C\u00e2u 12: Java 8 c\u00f3 nh\u1eefng t\u00ednh n\u0103ng n\u00e0o c\u1ea7n l\u01b0u \u00fd?\">C\u00e2u 12: Java 8 c\u00f3 nh\u1eefng t\u00ednh n\u0103ng n\u00e0o c\u1ea7n l\u01b0u \u00fd?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/#Cau_13_Look_cua_doi_tuong_trong_Java_la_gi\" title=\"C\u00e2u 13: Look c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng trong Java l\u00e0 g\u00ec?\">C\u00e2u 13: Look c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng trong Java l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_1_Lap_trinh_Java_duoc_phat_trien_boi_hang_nao\"><\/span><strong>C\u00e2u 1: L\u1eadp tr\u00ecnh Java \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi h\u00e3ng n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Java l\u00e0 m\u1ed9t trong nh\u1eefng <a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-lap-trinh\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh<\/strong><\/a> ph\u1ed5 bi\u1ebfn hi\u1ec7n nay v\u00e0 \u0111\u01b0\u1ee3c ra m\u1eaft v\u00e0o n\u0103m 1995, b\u1edfi \u0111\u01a1n v\u1ecb Sun Microsystems. \u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c nh\u00e0 tuy\u1ec3n d\u1ee5ng \u0111\u01b0a ra \u0111\u1ec3 ki\u1ec3m tra m\u1ee9c \u0111\u1ed9 hi\u1ec3u bi\u1ebft c\u01a1 b\u1ea3n c\u1ee7a c\u00e1c b\u1ea1n Java fresher.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-1-topcv.jpg\" alt=\"T\u1ed5ng h\u1ee3p nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java fresher ph\u1ed5 bi\u1ebfn\" class=\"wp-image-2418\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-1-topcv.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-1-topcv-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-1-topcv-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>T\u1ed5ng h\u1ee3p nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java fresher ph\u1ed5 bi\u1ebfn<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_2_Hien_tai_Java_dang_duoc_ho_tro_tren_nhung_nen_tang_nao\"><\/span><strong>C\u00e2u 2: Hi\u1ec7n t\u1ea1i, Java \u0111ang \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 tr\u00ean nh\u1eefng n\u1ec1n t\u1ea3ng n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Ng\u00f4n ng\u1eef Java hi\u1ec7n t\u1ea1i c\u00f3 th\u1ec3 ch\u1ea1y tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng kh\u00e1c nhau. V\u00ed d\u1ee5 nh\u01b0 Mac OS, Windows, Linux, Hp \u2013 Unix, Sun Solaris,\u2026 T\u01b0\u01a1ng t\u1ef1 v\u1edbi c\u00e2u \u0111\u1ea7u ti\u00ean, \u0111\u00e2y c\u0169ng l\u00e0 c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c \u0111\u01b0a ra \u0111\u1ec3 ki\u1ec3m tra ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng c\u1ee7a Java fresher.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_3_Hay_phan_biet_ve_Java_va_Java_Core\"><\/span><strong>C\u00e2u 3: H\u00e3y ph\u00e2n bi\u1ec7t v\u1ec1 Java v\u00e0 Java Core?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: V\u1edbi c\u00e2u h\u1ecfi n\u00e0y, c\u00e1c b\u1ea1n Java fresher ch\u1ec9 c\u1ea7n tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn v\u1ec1 \u0111i\u1ec3m kh\u00e1c nhau c\u1ee7a Java v\u00e0 Java Core. C\u1ee5 th\u1ec3 th\u00ec Java l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh c\u1ea5p cao c\u00f3 m\u1ee5c \u0111\u00edch d\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ng\u00f4n ng\u1eef <a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-huong-doi-tuong\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/strong><\/a>. C\u00f2n Java Core ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a Java \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n m\u00e3 kh\u1ea3 chuy\u1ec3n, m\u1ee5c \u0111\u00edch \u0111\u1ec3 di chuy\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng Desktop v\u00e0o m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_4_Hay_liet_ke_5_dac_diem_ma_Java_fresher_nen_biet_ve_Java\"><\/span><strong>C\u00e2u 4: H\u00e3y li\u1ec7t k\u00ea 5 \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 Java fresher n\u00ean bi\u1ebft v\u1ec1 Java?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: 5 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a Java m\u00e0 l\u1eadp tr\u00ecnh vi\u00ean Java fresher n\u00ean bi\u1ebft bao g\u1ed3m h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, th\u00f4ng d\u1ecbch, \u0111a lu\u1ed3ng, \u0111\u1ed9c l\u1eadp n\u1ec1n t\u1ea3ng v\u00e0 Robust. Ngo\u00e0i 5 \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y Java s\u1ebd c\u00f3 nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c tuy nhi\u00ean b\u1ea1n kh\u00f4ng c\u1ea7n li\u1ec7t k\u00ea qu\u00e1 chi ti\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_5_Trong_Java_doi_tuong_duoc_hieu_nhu_the_nao\"><\/span><strong>C\u00e2u 5: Trong Java, \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: \u0110\u1ed1i t\u01b0\u1ee3ng trong Java l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 t\u1ea1i runtime. \u0110\u1ed1i t\u01b0\u1ee3ng s\u1ebd l\u00e0 tr\u1ea1ng th\u00e1i \u0111\u01b0\u1ee3c l\u01b0u \u1edf trong tr\u01b0\u1eddng, h\u00e0nh vi \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua ph\u01b0\u01a1ng th\u1ee9c giao ti\u1ebfp. Ph\u01b0\u01a1ng th\u1ee9c v\u1eadn h\u00e0nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd \u0111\u00f3ng vai tr\u00f2 s\u01a1 c\u1ea5p ph\u1ee5c v\u1ee5 s\u1ef1 giao ti\u1ebfp qua l\u1ea1i c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_6_Phan_biet_su_khac_nhau_giua_lop_Nested_Class_va_Inner_Class\"><\/span><strong>C\u00e2u 6: Ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau gi\u1eefa l\u1edbp Nested Class v\u00e0 Inner Class?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: T\u01b0\u01a1ng t\u1ef1 v\u1edbi c\u00e2u 3, Java fresh ch\u1ec9 c\u1ea7n tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn c\u00e2u h\u1ecfi n\u00e0y. C\u1ee5 th\u1ec3, Inner Class l\u00e0 l\u1edbp trong ph\u1ea1m vi l\u1edbp kh\u00e1c. C\u00f2n Nested Class l\u00e0 Access Modifier c\u1ee7a Inner khi n\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n \u1edf d\u1ea1ng Static.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-2-topcv.jpg\" alt=\"B\u1ea1n c\u1ea7n ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c Nested Class v\u00e0 Inner Class trong Java\" class=\"wp-image-2419\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-2-topcv.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-2-topcv-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-2-topcv-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>B\u1ea1n c\u1ea7n ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c Nested Class v\u00e0 Inner Class trong Java<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_7_Ban_hieu_the_nao_ve_Checked_Exception\"><\/span><strong>C\u00e2u 7: B\u1ea1n hi\u1ec3u th\u1ebf n\u00e0o v\u1ec1 Checked Exception?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Checked Exception l\u00e0 l\u1ed7i m\u00e0 ng\u01b0\u1eddi s\u1eed d\u1ee5ng\/m\u1ed9t v\u1ea5n \u0111\u1ec1 b\u1ea5t ng\u1edd x\u1ea3y ra m\u00e0 l\u1eadp tr\u00ecnh vi\u00ean kh\u00f4ng th\u1ec3 bi\u1ebft tr\u01b0\u1edbc \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh code ph\u1ea7n m\u1ec1m. Checked Exception kh\u00f4ng th\u1ec3 b\u1ecf qua th\u1eddi \u0111i\u1ec3m bi\u00ean d\u1ecbch. L\u01b0u \u00fd, Checked Exception s\u1ebd kh\u00e1c v\u1edbi Runtime Exception.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_8_Gui_phuong_thuc_dong_trong_Java_la_gi\"><\/span><strong>C\u00e2u 8: G\u1eedi ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed9ng trong Java l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: G\u1eedi ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed9ng trong Java ch\u00ednh l\u00e0 m\u1ed9t l\u1eddi g\u1ecdi 1 ph\u01b0\u01a1ng th\u1ee9c n\u00e0o \u0111\u00f3 \u0111ang b\u1ecb ghi \u0111\u00e8. Ho\u1ea1t \u0111\u1ed9ng n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft t\u1ea1i runtime thay cho vi\u1ec7c d\u00f9ng compile time.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_9_Neu_hieu_biet_cua_ban_ve_tinh_ke_thua_trong_Java\"><\/span><strong>C\u00e2u 9: N\u00eau hi\u1ec3u bi\u1ebft c\u1ee7a b\u1ea1n v\u1ec1 t\u00ednh k\u1ebf th\u1eeba trong Java?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: T\u00ednh k\u1ebf th\u1eeba (Inheritance) trong Java l\u00e0 qu\u00e1 tr\u00ecnh m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng thu thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c \u0111\u00e3 \u0111\u01b0\u1ee3c khai b\u00e1o. Khi l\u1eadp tr\u00ecnh Java, n\u1ebfu s\u1eed d\u1ee5ng t\u00ednh k\u1ebf th\u1ec3, b\u1ea1n c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd th\u00f4ng tin d\u1ec5 d\u00e0ng h\u01a1n b\u1edfi ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o ra v\u1edbi c\u1ea5u tr\u00fac c\u00f3 th\u1ee9 t\u1ef1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_10_Neu_hieu_biet_ve_loi_ich_cua_tinh_bao_dong_trong_Java\"><\/span><strong>C\u00e2u 10: N\u00eau hi\u1ec3u bi\u1ebft v\u1ec1 l\u1ee3i \u00edch c\u1ee7a t\u00ednh bao \u0111\u00f3ng trong Java?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: T\u00ednh bao \u0111\u00f3ng mang l\u1ea1i l\u1ee3i \u00edch n\u1ed5i b\u1eadt nh\u1ea5t ch\u00ednh l\u00e0 kh\u1ea3 n\u0103ng s\u1eeda code ngay c\u1ea3 khi <a href=\"https:\/\/topviecit.vn\/blog\/developer-la-gi-2\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>developer<\/strong><\/a> \u0111\u00e3 tri\u1ec3n khai. Qu\u00e1 tr\u00ecnh s\u1eeda c\u0169ng r\u1ea5t nhanh, th\u1eadm ch\u00ed s\u1ebd kh\u00f4ng g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nh\u1eefng ph\u1ea7n code c\u1ee7a c\u00e1c developer kh\u00e1c. T\u00ednh bao \u0111\u00f3ng trong Java c\u0169ng r\u1ea5t linh \u0111\u1ed9ng v\u00e0 c\u00f3 t\u00ednh duy tr\u00ec cao.<\/p>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/developer-la-gi-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Developer L\u00e0 G\u00ec<\/mark><\/a>? M\u00f4 T\u1ea3 C\u00f4ng Vi\u1ec7c V\u00e0 M\u1ee9c Thu Nh\u1eadp C\u1ee7a Developer<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_11_The_nao_la_Spring_trong_Java_Co_may_phien_ban\"><\/span><strong>C\u00e2u 11: Th\u1ebf n\u00e0o l\u00e0 Spring trong Java? C\u00f3 m\u1ea5y phi\u00ean b\u1ea3n?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Spring trong l\u1eadp tr\u00ecnh Java l\u00e0 m\u1ed9t khung Framework c\u00f3 m\u00e3 ngu\u1ed3n m\u1edf. Spring \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u00fap <a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-java-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>l\u1eadp tr\u00ecnh Java<\/strong><\/a> c\u00f3 th\u1ec3 t\u1ea1o \u0111\u01b0\u1ee3c nh\u1eefng \u1ee9ng d\u1ee5ng website b\u1ea5t k\u1ef3 n\u00e0o \u0111\u00f3. Hi\u1ec7n c\u00f3 3 phi\u00ean b\u1ea3n Spring ch\u00ednh l\u00e0 Spring 2.5, 3.0 v\u00e0 4.0.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_12_Java_8_co_nhung_tinh_nang_nao_can_luu_y\"><\/span><strong>C\u00e2u 12: Java 8 c\u00f3 nh\u1eefng t\u00ednh n\u0103ng n\u00e0o c\u1ea7n l\u01b0u \u00fd?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Java 8 c\u00f3 kh\u00e1 nhi\u1ec1u t\u00ednh n\u0103ng kh\u00e1c nhau. Tuy v\u1eady, c\u00e1c Java fresher n\u00ean quan t\u00e2m \u0111\u1ebfn nh\u1eefng t\u00ednh n\u0103ng nh\u01b0 bi\u1ec3u th\u1ee9c Lambda, Java time API, ph\u01b0\u01a1ng th\u1ee9c forEach, Stream API, Java IO, Collection API, Static v\u00e0 method, c\u1ea3i ti\u1ebfn Core API, Concurrency API,\u2026<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_13_Look_cua_doi_tuong_trong_Java_la_gi\"><\/span><strong>C\u00e2u 13: Look c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng trong Java l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u1ea3 l\u1eddi: Look \u0111\u1ed1i t\u01b0\u1ee3ng trong ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java l\u00e0 k\u1ef9 thu\u1eadt s\u1eed d\u1ee5ng nhi\u1ec1u Thread \u0111\u1ec3 thu nhi\u1ec1u l\u01b0\u1ee3t truy c\u1eadp \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o \u0111\u00f3. M\u1ed7i m\u1ed9t Thread s\u1ebd c\u00f3 th\u1ec3 th\u1ef1c thi \u0111\u01b0\u1ee3c 1 ph\u01b0\u01a1ng th\u1ee9c synchronized, \u0111i\u1ec1u ki\u1ec7n l\u00e0 khi n\u00f3 \u0111\u00e3 \u0111\u1ecdc \u0111\u01b0\u1ee3c look c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ea7n th\u1ef1c thi l\u00e0 g\u00ec.<\/p>\n\n\n\n<p><strong>T\u00ecm hi\u1ec3u th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ea5t t\u1ea7n t\u1eadt kinh nghi\u1ec7m ph\u1ecfng v\u1ea5n Java chinh ph\u1ee5c nh\u00e0 tuy\u1ec3n d\u1ee5ng<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-3-topcv.jpg\" alt=\" Look \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u1ea7n bi\u1ebft trong ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java\" class=\"wp-image-2420\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-3-topcv.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-3-topcv-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/08\/Java-fresher-3-topcv-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>&nbsp;Look \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u1ea7n bi\u1ebft trong ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 13 c\u00e2u h\u1ecfi <strong>Java fresher<\/strong> ph\u1ed5 bi\u1ebfn c\u00f3 \u0111\u00e1p \u00e1n m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o tr\u01b0\u1edbc bu\u1ed5i ph\u1ecfng v\u1ea5n s\u1eafp t\u1edbi. \u0110\u1ec3 bi\u1ebft th\u00eam c\u00e1c th\u00f4ng tin kh\u00e1c li\u00ean quan \u0111\u1ebfn l\u1eadp tr\u00ecnh vi\u00ean hay ng\u00e0nh IT, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ecdc th\u00eam t\u1ea1i m\u1ee5c&nbsp;<strong><a href=\"https:\/\/topviecit.vn\/blog\/chuyen-muc\/chia-se-kinh-nghiem\/\" target=\"_blank\" rel=\"noreferrer noopener\">Chia s\u1ebb kinh nghi\u1ec7m<\/a><\/strong>&nbsp;c\u1ee7a TopviecIT. Ngo\u00e0i ra, n\u1ebfu b\u1ea1n mu\u1ed1n&nbsp;<strong><a href=\"https:\/\/www.topcv.vn\/tim-viec-lam-lap-trinh-vien-java\" target=\"_blank\" rel=\"noreferrer noopener\">t\u00ecm vi\u1ec7c l\u00e0m l\u1eadp tr\u00ecnh vi\u00ean Java<\/a><\/strong>, website&nbsp;<a href=\"https:\/\/www.topcv.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopCV<\/strong><\/a>&nbsp;l\u00e0 1 l\u1ef1a ch\u1ecdn uy t\u00edn v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cho b\u1ea1n. B\u1ea1n s\u1ebd ti\u1ebfp c\u1eadn ngay v\u1edbi c\u00e1c tin tuy\u1ec3n d\u1ee5ng c\u00f3 m\u1ee9c thu nh\u1eadp h\u1ea5p d\u1eabn hi\u1ec7n nay.<\/p>\n\n\n\n<p><strong>C\u00f3 th\u1ec3 b\u1ea1n quan t\u00e2m: <a href=\"https:\/\/topviecit.vn\/blog\/java-developer\/\" target=\"_blank\" rel=\"noreferrer noopener\">10 tips \u0111\u1ec3 n\u00e2ng tr\u00ecnh cho Java Developer h\u1eefu \u00edch cho b\u1ea1n<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u1ecb tr\u00ed Java fresher th\u01b0\u1eddng \u0111\u01b0\u1ee3c kh\u00e1 nhi\u1ec1u b\u1ea1n tr\u1ebb, c\u00e1c b\u1ea1n sinh vi\u00ean m\u1edbi ra tr\u01b0\u1eddng quan t\u00e2m. N\u1ebfu b\u1ea1n s\u1eafp c\u00f3 bu\u1ed5i ph\u1ecfng v\u1ea5n v\u1ecb tr\u00ed n\u00e0y, 13 c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p b\u1edfi TopviecIT sau \u0111\u00e2y s\u1ebd h\u1eefu \u00edch cho b\u1ea1n. C\u00e2u 1: L\u1eadp tr\u00ecnh Java \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi h\u00e3ng n\u00e0o? [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":2417,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[86],"tags":[652,650,647,646,651,648,649],"class_list":["post-2416","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem","tag-cac-cau-hoi-phong-van-java-core","tag-cau-hoi-phong-van-java-fresher","tag-fresher-java","tag-java-fresher","tag-phong-van-java-spring","tag-tuyen-dung-fresher-java","tag-tuyen-fresher-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>13 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java fresher ph\u1ed5 bi\u1ebfn c\u00f3 \u0111\u00e1p \u00e1n<\/title>\n<meta name=\"description\" content=\"V\u1ecb tr\u00ed Java fresher \u0111ang \u0111\u01b0\u1ee3c c\u00e1c b\u1ea1n sinh vi\u00ean m\u1edbi ra tr\u01b0\u1eddng quan t\u00e2m. 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