{"id":2976,"date":"2024-11-25T13:06:43","date_gmt":"2024-11-25T06:06:43","guid":{"rendered":"https:\/\/fstack.io.vn\/?p=2976"},"modified":"2024-11-25T16:24:49","modified_gmt":"2024-11-25T09:24:49","slug":"constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java","status":"publish","type":"post","link":"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/","title":{"rendered":"Constructor (h\u00e0m t\u1ea1o) trong Java l\u00e0 g\u00ec? M\u1ed9t s\u1ed1 c\u00e1ch khai b\u00e1o Constructor trong Java."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2976\" class=\"elementor elementor-2976\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e827dc2 e-flex e-con-boxed e-con e-parent\" data-id=\"e827dc2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-87cfae4 elementor-widget elementor-widget-text-editor\" data-id=\"87cfae4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Constructor (h\u00e0m t\u1ea1o) trong <a href=\"https:\/\/fstack.io.vn\/blog\/java-la-gi-mot-so-kien-thuc-ve-ngon-ngu-lap-trinh-java\/\">Java<\/a> l\u00e0 m\u1ed9t <strong>ph\u01b0\u01a1ng th\u1ee9c \u0111\u1eb7c bi\u1ec7t<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi t\u1ea1o <a href=\"https:\/\/fstack.io.vn\/blog\/lap-trinh-huong-doi-tuong-la-gi-mot-so-dac-trung-cua-oop\/\">\u0111\u1ed1i t\u01b0\u1ee3ng<\/a> c\u1ee7a l\u1edbp. M\u1ed7i khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o, constructor s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c g\u1ecdi.<\/p>\n<p><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:&nbsp;<\/strong><\/p>\n<ul>\n<li><strong>T\u00ean constructor tr\u00f9ng v\u1edbi t\u00ean l\u1edbp.<\/strong><\/li>\n<li><strong>Kh\u00f4ng c\u00f3 ki\u1ec3u tr\u1ea3 v\u1ec1 (void c\u0169ng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p).<\/strong><\/li>\n<li>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u00e1n gi\u00e1 tr\u1ecb ban \u0111\u1ea7u cho c\u00e1c bi\u1ebfn th\u00e0nh vi\u00ean ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c kh\u1edfi t\u1ea1o.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-81c2679 elementor-widget elementor-widget-heading\" data-id=\"81c2679\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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\" style=\"cursor:inherit\">Danh m\u1ee5c b\u00e0i vi\u1ebft<\/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:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#1_Tai_sao_can_Constructor\" >1. T\u1ea1i sao c\u1ea7n Constructor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#2_Cac_loai_Constructor_trong_Java\" >2. C\u00e1c lo\u1ea1i Constructor trong Java<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#a_Constructor_mac_dinh_Default_Constructor\" >a. Constructor m\u1eb7c \u0111\u1ecbnh (Default Constructor)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#b_Constructor_khong_tham_so\" >b. Constructor kh\u00f4ng tham s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#c_Constructor_co_tham_so\" >c. Constructor c\u00f3 tham s\u1ed1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#3_Vi_du_minh_hoa\" >3. V\u00ed d\u1ee5 minh h\u1ecda<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#Vi_du_1_Constructor_mac_dinh\" >V\u00ed d\u1ee5 1: Constructor m\u1eb7c \u0111\u1ecbnh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#Vi_du_2_Constructor_co_tham_so\" >V\u00ed d\u1ee5 2: Constructor c\u00f3 tham s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#Vi_du_3_Goi_constructor_trong_constructor_khac_Constructor_chaining\" >V\u00ed d\u1ee5 3: G\u1ecdi constructor trong constructor kh\u00e1c (Constructor chaining)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#4_Khac_biet_giua_Constructor_va_phuong_thuc\" >4. Kh\u00e1c bi\u1ec7t gi\u1eefa Constructor v\u00e0 ph\u01b0\u01a1ng th\u1ee9c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/#Tong_ket\" >T\u1ed5ng k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"1_Tai_sao_can_Constructor\"><\/span>1. T\u1ea1i sao c\u1ea7n Constructor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f46196 elementor-widget elementor-widget-text-editor\" data-id=\"2f46196\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Constructor gi\u00fap:<\/p><ul><li><strong>Kh\u1edfi t\u1ea1o gi\u00e1 tr\u1ecb ban \u0111\u1ea7u<\/strong> cho \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li><li>\u0110\u1ea3m b\u1ea3o <strong>t\u00ednh nh\u1ea5t qu\u00e1n<\/strong> khi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li><li><strong>T\u1ef1 \u0111\u1ed9ng h\u00f3a<\/strong> vi\u1ec7c g\u00e1n gi\u00e1 tr\u1ecb m\u00e0 kh\u00f4ng c\u1ea7n g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c ri\u00eang l\u1ebb.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d2e481 elementor-widget elementor-widget-heading\" data-id=\"9d2e481\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"2_Cac_loai_Constructor_trong_Java\"><\/span>2. C\u00e1c lo\u1ea1i Constructor trong Java<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0022488 elementor-widget elementor-widget-heading\" data-id=\"0022488\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"a_Constructor_mac_dinh_Default_Constructor\"><\/span>a. Constructor m\u1eb7c \u0111\u1ecbnh (Default Constructor)<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96c5ccc elementor-widget elementor-widget-text-editor\" data-id=\"96c5ccc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Java t\u1ef1 \u0111\u1ed9ng t\u1ea1o m\u1ed9t constructor m\u1eb7c \u0111\u1ecbnh n\u1ebfu kh\u00f4ng c\u00f3 constructor n\u00e0o \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong l\u1edbp.<\/li><li>N\u00f3 kh\u00f4ng c\u00f3 tham s\u1ed1 v\u00e0 kh\u00f4ng th\u1ef1c hi\u1ec7n b\u1ea5t k\u1ef3 h\u00e0nh \u0111\u1ed9ng n\u00e0o kh\u00e1c ngo\u00e0i vi\u1ec7c t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-318d48f elementor-widget elementor-widget-code-highlight\" data-id=\"318d48f\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>class Student {\r\n    int id;\r\n    String name;\r\n\r\n    \/\/ Constructor m\u1eb7c \u0111\u1ecbnh\r\n    Student() {\r\n        System.out.println(\"Default constructor \u0111\u01b0\u1ee3c g\u1ecdi\");\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c1ad70 elementor-widget elementor-widget-heading\" data-id=\"4c1ad70\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"b_Constructor_khong_tham_so\"><\/span>b. Constructor kh\u00f4ng tham s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ebe1eee elementor-widget elementor-widget-text-editor\" data-id=\"ebe1eee\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>L\u00e0 constructor do <a href=\"https:\/\/fstack.io.vn\/blog\/lap-trinh-la-gi-mot-so-dac-diem-cua-lap-trinh-ma-ban-nen-biet\/\">l\u1eadp tr\u00ecnh<\/a> vi\u00ean t\u1ef1 \u0111\u1ecbnh ngh\u0129a m\u00e0 kh\u00f4ng c\u00f3 tham s\u1ed1.<\/li><li>D\u00f9ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng kh\u1edfi t\u1ea1o c\u1ee5 th\u1ec3.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e4cf47d elementor-widget elementor-widget-code-highlight\" data-id=\"e4cf47d\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>class Car {\r\n    String brand;\r\n\r\n    \/\/ Constructor kh\u00f4ng tham s\u1ed1\r\n    Car() {\r\n        brand = \"Toyota\";\r\n        System.out.println(\"Car brand: \" + brand);\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad38712 elementor-widget elementor-widget-heading\" data-id=\"ad38712\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"c_Constructor_co_tham_so\"><\/span>c. Constructor c\u00f3 tham s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30ffdd1 elementor-widget elementor-widget-text-editor\" data-id=\"30ffdd1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi c\u1ea7n kh\u1edfi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3.<\/li><li>Constructor n\u00e0y nh\u1eadn tham s\u1ed1 v\u00e0 g\u00e1n gi\u00e1 tr\u1ecb cho c\u00e1c bi\u1ebfn th\u00e0nh vi\u00ean.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-622baa9 elementor-widget elementor-widget-code-highlight\" data-id=\"622baa9\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>public class MyClass {\r\n    private int number;\r\n    private String text;\r\n\r\n    \/\/ Constructor\r\n    public MyClass(int num, String txt) {\r\n        this.number = num;\r\n        this.text = txt;\r\n    }\r\n\r\n    \/\/ Getters\r\n    public int getNumber() {\r\n        return number;\r\n    }\r\n\r\n    public String getText() {\r\n        return text;\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a849308 elementor-widget elementor-widget-heading\" data-id=\"a849308\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"3_Vi_du_minh_hoa\"><\/span>3. V\u00ed d\u1ee5 minh h\u1ecda<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1905a76 elementor-widget elementor-widget-heading\" data-id=\"1905a76\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Vi_du_1_Constructor_mac_dinh\"><\/span>V\u00ed d\u1ee5 1: Constructor m\u1eb7c \u0111\u1ecbnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-511d4a6 elementor-widget elementor-widget-code-highlight\" data-id=\"511d4a6\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>class Animal {\r\n    Animal() {\r\n        System.out.println(\"Default constructor c\u1ee7a Animal\");\r\n    }\r\n\r\n    public static void main(String[] args) {\r\n        Animal animal = new Animal();\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c0df4cf elementor-widget elementor-widget-heading\" data-id=\"c0df4cf\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Vi_du_2_Constructor_co_tham_so\"><\/span>V\u00ed d\u1ee5 2: Constructor c\u00f3 tham s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a73b35e elementor-widget elementor-widget-code-highlight\" data-id=\"a73b35e\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>class Person {\r\n    String name;\r\n    int age;\r\n\r\n    Person(String personName, int personAge) {\r\n        name = personName;\r\n        age = personAge;\r\n    }\r\n\r\n    void displayInfo() {\r\n        System.out.println(\"Name: \" + name + \", Age: \" + age);\r\n    }\r\n\r\n    public static void main(String[] args) {\r\n        Person person = new Person(\"John\", 25);\r\n        person.displayInfo();\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c6d8df4 elementor-widget elementor-widget-heading\" data-id=\"c6d8df4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Vi_du_3_Goi_constructor_trong_constructor_khac_Constructor_chaining\"><\/span>V\u00ed d\u1ee5 3: G\u1ecdi constructor trong constructor kh\u00e1c (Constructor chaining)<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc29349 elementor-widget elementor-widget-code-highlight\" data-id=\"fc29349\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>class Product {\r\n    String name;\r\n    double price;\r\n\r\n    \/\/ Constructor 1\r\n    Product() {\r\n        this(\"Unknown Product\", 0.0); \/\/ G\u1ecdi Constructor 2\r\n    }\r\n\r\n    \/\/ Constructor 2\r\n    Product(String productName, double productPrice) {\r\n        name = productName;\r\n        price = productPrice;\r\n    }\r\n\r\n    void display() {\r\n        System.out.println(\"Product: \" + name + \", Price: $\" + price);\r\n    }\r\n\r\n    public static void main(String[] args) {\r\n        Product defaultProduct = new Product();\r\n        defaultProduct.display();\r\n\r\n        Product specificProduct = new Product(\"Laptop\", 1500.0);\r\n        specificProduct.display();\r\n    }\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-351f770 elementor-widget elementor-widget-heading\" data-id=\"351f770\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"4_Khac_biet_giua_Constructor_va_phuong_thuc\"><\/span>4. Kh\u00e1c bi\u1ec7t gi\u1eefa Constructor v\u00e0 ph\u01b0\u01a1ng th\u1ee9c<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d599889 elementor-widget elementor-widget-text-editor\" data-id=\"d599889\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table><thead><tr><th><strong>Ti\u00eau ch\u00ed<\/strong><\/th><th><strong>Constructor<\/strong><\/th><th><strong>Ph\u01b0\u01a1ng th\u1ee9c<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>T\u00ean<\/strong><\/td><td>Tr\u00f9ng v\u1edbi t\u00ean l\u1edbp<\/td><td>B\u1ea5t k\u1ef3 t\u00ean n\u00e0o.<\/td><\/tr><tr><td><strong>Ki\u1ec3u tr\u1ea3 v\u1ec1<\/strong><\/td><td>Kh\u00f4ng c\u00f3 (void c\u0169ng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng).<\/td><td>C\u00f3 th\u1ec3 c\u00f3 ki\u1ec3u tr\u1ea3 v\u1ec1 ho\u1eb7c kh\u00f4ng.<\/td><\/tr><tr><td><strong>T\u1ef1 \u0111\u1ed9ng g\u1ecdi<\/strong><\/td><td>\u0110\u01b0\u1ee3c g\u1ecdi t\u1ef1 \u0111\u1ed9ng khi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td><td>Ph\u1ea3i \u0111\u01b0\u1ee3c g\u1ecdi th\u1ee7 c\u00f4ng.<\/td><\/tr><tr><td><strong>M\u1ee5c \u0111\u00edch<\/strong><\/td><td>Kh\u1edfi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 g\u00e1n gi\u00e1 tr\u1ecb ban \u0111\u1ea7u.<\/td><td>Th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng ho\u1eb7c logic c\u1ee5 th\u1ec3.<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91f8d5a elementor-widget elementor-widget-heading\" data-id=\"91f8d5a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Tong_ket\"><\/span>T\u1ed5ng k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6987732 elementor-widget elementor-widget-text-editor\" data-id=\"6987732\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Constructor \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c kh\u1edfi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a m\u00e3 ngu\u1ed3n trong Java. Ng\u01b0\u1eddi l\u1eadp tr\u00ecnh c\u1ea7n hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i constructor v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng \u0111\u1ec3 vi\u1ebft m\u00e3 ng\u1eafn g\u1ecdn, hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p><p><strong>Tham kh\u1ea3o th\u00eam:<\/strong><\/p><ul><li><a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/\" target=\"_new\" rel=\"noopener nofollow\">Java Official Documentation<\/a><\/li><li><a href=\"https:\/\/www.javatpoint.com\/\" target=\"_new\" rel=\"noopener nofollow\">Java Programming Tutorials<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Constructor (h\u00e0m t\u1ea1o) trong Java l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp. M\u1ed7i khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o, constructor s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c g\u1ecdi. \u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:&nbsp; T\u00ean constructor tr\u00f9ng v\u1edbi t\u00ean l\u1edbp. Kh\u00f4ng c\u00f3 ki\u1ec3u tr\u1ea3 v\u1ec1 (void c\u0169ng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p). \u0110\u01b0\u1ee3c s\u1eed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2977,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1,48],"tags":[56,79,64],"class_list":["post-2976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghe","category-lap-trinh","tag-backend-developer","tag-java","tag-oop"],"acf":[],"jetpack_featured_media_url":"https:\/\/fstack.io.vn\/blog\/wp-content\/uploads\/2024\/11\/constructor-java-_fstack.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/comments?post=2976"}],"version-history":[{"count":7,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2976\/revisions"}],"predecessor-version":[{"id":2998,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2976\/revisions\/2998"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/media\/2977"}],"wp:attachment":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/media?parent=2976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/categories?post=2976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/tags?post=2976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}