{"id":2111,"date":"2026-05-26T08:05:43","date_gmt":"2026-05-26T08:05:43","guid":{"rendered":"https:\/\/www.vpascode.com\/id\/docs\/uncategorized\/mermaid-js-class-diagram-syntax-guide\/"},"modified":"2026-05-26T08:05:43","modified_gmt":"2026-05-26T08:05:43","slug":"mermaid-js-class-diagram-syntax-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/id\/docs\/vpascode-docs\/mermaid-js-class-diagram-syntax-guide\/","title":{"rendered":"Panduan Sintaks Diagram Kelas Mermaid.js"},"content":{"rendered":"<h2>Apa itu Diagram Kelas?<\/h2>\n<p>Sebuah <strong>Diagram Kelas<\/strong> adalah struktur <strong>diagram UML<\/strong> yang memvisualisasikan arsitektur statis dari sistem perangkat lunak berorientasi objek. Sebagai jenis diagram UML yang tak tergantikan, <strong>jenis diagram UML<\/strong>, diagram ini memetakan kelas-kelas individu, antarmuka, dan model data dalam aplikasi Anda, secara eksplisit mendokumentasikan bidang internal mereka (atribut), fungsi operasional (metode), dan hubungan struktural yang menghubungkan mereka. Rancangan ini sangat penting bagi insinyur perangkat lunak yang perlu menerjemahkan desain domain tingkat tinggi menjadi struktur objek yang bersih dan dapat dipelihara.<\/p>\n<p>Dengan <strong>Mermaid.js<\/strong>, Anda dapat menggambarkan model data dan layanan sistem Anda menggunakan definisi berbasis teks yang intuitif. Mesin tata letak secara otomatis menghitung ukuran kotak, menyusun kompartemen data UML standar, dan menyesuaikan panah relasional di seluruh kanvas Anda tanpa beban format manual.<\/p>\n<h2>Panduan Sintaks Inti: Elemen dan Konstruksi<\/h2>\n<p>Untuk merancang diagram kelas UML yang akurat dan sesuai standar dalam Mermaid, Anda harus menguasai deklarasi anggota, modifer akses, dan panah hubungan struktural.<\/p>\n<h3>1. Deklarasi Kelas dan Kompartemen Kelas<\/h3>\n<p>Anda dapat mendefinisikan sebuah kelas menggunakan dua format yang valid. Untuk kelas sederhana, gunakan kata kunci <code>class<\/code>diikuti oleh nama kelas. Jika Anda ingin menyertakan bidang dan metode segera, gunakan kurung kurawal belakang untuk membuat blok tubuh yang jelas:<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiEJocWpRQFF+WmZOqkI1RAIEtINLijLz0hVKgdJ5ibmpmDKpuYmZOUjCpQUpiSWpriBRjbzUcjBDU6EsPzMFoqgWAOaDJdQ=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiEJocWpRQFF+WmZOqkI1RAIEtINLijLz0hVKgdJ5ibmpmDKpuYmZOUjCpQUpiSWpriBRjbzUcjBDU6EsPzMFoqgWAOaDJdQ=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">classDiagram\r\n    class UserProfile {\r\n        +String username\r\n        +String email\r\n        +updateEmail(newEmail) void\r\n    }<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiEJocWpRQFF+WmZOqkI1RAIEtINLijLz0hVKgdJ5ibmpmDKpuYmZOUjCpQUpiSWpriBRjbzUcjBDU6EsPzMFoqgWAOaDJdQ=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiEJocWpRQFF+WmZOqkI1RAIEtINLijLz0hVKgdJ5ibmpmDKpuYmZOUjCpQUpiSWpriBRjbzUcjBDU6EsPzMFoqgWAOaDJdQ=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"QKYoRec\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-618\" decoding=\"async\" fetchpriority=\"high\" height=\"184\" sizes=\"(max-width: 303px) 100vw, 303px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19030c532c9.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19030c532c9.png 303w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19030c532c9-300x182.png 300w\" width=\"303\"\/><\/p>\n<h3>2. Menambahkan Visibilitas \/ Modifer Akses<\/h3>\n<p>Untuk mendokumentasikan aturan enkapsulasi UML standar, letakkan simbol tertentu tepat sebelum nama atribut atau metode Anda untuk menentukan tingkat visibilitasnya:<\/p>\n<ul>\n<li><code>+<\/code> **Publik:** Dapat diakses dari kelas lainnya.<\/li>\n<li><code>-<\/code> **Pribadi:** Hanya dapat diakses dalam kelas yang mendeklarasikannya.<\/li>\n<li><code>#<\/code> **Terlindungi:** Dapat diakses dalam kelas dan kelas turunannya.<\/li>\n<li><code>~<\/code> **Paket \/ Internal:** Dapat diakses dalam batas paket yang sama.<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiIJTYl62Y3JyfmleiUI1RAIEdFPyS5NyUhWSEnMS85JTERLKwSVFmXnpCokQPR75OSmpRQhp7fTUEieIHg1NBYghENlaANmyJWY=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiIJTYl62Y3JyfmleiUI1RAIEdFPyS5NyUhWSEnMS85JTERLKwSVFmXnpCokQPR75OSmpRQhp7fTUEieIHg1NBYghENlaANmyJWY=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">classDiagram\r\n    class BankAccount {\r\n        -double balance\r\n        #String accountHolder\r\n        +getBalance() double\r\n    }<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiIJTYl62Y3JyfmleiUI1RAIEdFPyS5NyUhWSEnMS85JTERLKwSVFmXnpCokQPR75OSmpRQhp7fTUEieIHg1NBYghENlaANmyJWY=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAgmSQiIJTYl62Y3JyfmleiUI1RAIEdFPyS5NyUhWSEnMS85JTERLKwSVFmXnpCokQPR75OSmpRQhp7fTUEieIHg1NBYghENlaANmyJWY=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"XgBkvsQ\"><img alt=\"\" class=\"alignnone size-full wp-image-619\" decoding=\"async\" height=\"184\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903106882d.png\" width=\"249\"\/><\/p>\n<h3>3. Menguasai Panah Hubungan dan Tautan Pewarisan<\/h3>\n<p>Untuk menunjukkan bagaimana kelas berinteraksi dalam model diagram UML Anda, sambungkan ID mereka menggunakan string hubungan khusus. Dalam Mermaid, arah garis penting: ujung panah mengarah ke kelas induk atau kelas kontainer.<\/p>\n<ul>\n<li><strong>Pewarisan \/ Generalisasi (Panah Putus-putus atau Padat):<\/strong> <code>Anak --|&gt; Induk<\/code> (Mewakili hubungan &#8216;adalah&#8217;).<\/li>\n<li><strong>Realisasi \/ Implementasi:<\/strong> <code>Kelas ..|&gt; Antarmuka<\/code> (Mewakili kelas yang memenuhi kontrak antarmuka).<\/li>\n<li><strong>Komposisi (Berlian Padat):<\/strong> <code>Anak --* Induk<\/code> (Mewakili kepemilikan ketat; jika induk mati, anak juga mati).<\/li>\n<li><strong>Agregasi (Berlian Jernih):<\/strong> <code>Anak --o Induk<\/code> (Mewakili hubungan koleksi longgar; anak dapat ada secara mandiri).<\/li>\n<li><strong>Ketergantungan:<\/strong> <code>KelasA ..&gt; KelasB<\/code> (Mewakili referensi runtime sementara).<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAAufEIgVd3Ro7hbDUjMzknFQFKwUlz7yM1KLMkmKFtKL8XCWIOte89My8VKBSLbAWkKpihYLEohKF\/DQlAHyeGXI=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAAt\/8pMwcBV3dGjsF79S8lMSixMQ8BSsFJd\/U8sSizOJMBaBQphJUbWpxZh5QrRZUF1CZU2J6JlADWBEAO+0b+A==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">classDiagram\r\n    Mobil --|&gt; Kendaraan : \"Mewarisi dari\"\r\n    Mesin --* Mobil : \"Bagian dari\"<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAAt\/8pMwcBV3dGjsF79S8lMSixMQ8BSsFJd\/U8sSizOJMBaBQphJUbWpxZh5QrRZUF1CZU2J6JlADWBEAO+0b+A==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLzkksLnbJTEwvSszl5VIAAufEIgVd3Ro7hbDUjMzknFQFKwUlz7yM1KLMkmKFtKL8XCWIOte89My8VKBSLbAWkKpihYLEohKF\/DQlAHyeGXI=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"wCxJKDf\"><img alt=\"\" class=\"alignnone size-full wp-image-620\" decoding=\"async\" height=\"416\" sizes=\"(max-width: 123px) 100vw, 123px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903163fbcf.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903163fbcf.png 123w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903163fbcf-89x300.png 89w\" width=\"123\"\/><\/p>\n<h2>Praktik Terbaik untuk Tata Letak Arsitektur Kelas yang Bersih<\/h2>\n<ul>\n<li><strong>Kelompokkan Anggota Kelas Secara Visual:<\/strong> Selalu kelompokkan variabel kelas Anda di bagian atas blok tubuh dan fungsi Anda di bagian bawah. Tata letak ini sesuai dengan struktur kelas standar di IDE dan membuat diagram Anda langsung mudah dibaca.<\/li>\n<li><strong>Tentukan Tipe Pengembalian:<\/strong> Saat mendeklarasikan metode, tambahkan tipe pengembalian di akhir baris metode (misalnya, <code>+fetchData() DataSet<\/code>). Ini memberikan konteks implementasi yang tepat bagi tim rekayasa Anda.<\/li>\n<li><strong>Jaga Klaritas Multiplicity:<\/strong> Untuk menunjukkan jumlah array atau ukuran koleksi, tambahkan string teks multiplicity langsung ke pembungkus baris hubungan (misalnya, <code>Customer \"1\" --o \"banyak\" Order<\/code>).<\/li>\n<\/ul>\n<h2>Contoh Diagram Kelas Mermaid.js Dunia Nyata<\/h2>\n<h3>Contoh 1: Subsistem Domain Gateway Pembayaran (Enkapsulasi &amp; Antarmuka)<\/h3>\n<p>Rancangan fungsional ini memodelkan layanan domain checkout online. Ini menunjukkan cara menggunakan modifier akses, mengelompokkan anggota kelas, dan menerapkan hubungan antarmuka secara bersih.<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNq1UUFqw0AMvAfyhyWnhNI8IASfAsX0Ymj7AHVXcRd2pUUrtzVp\/147ToiTlNJLdBzNSDOSDZDzxkMtEKcT05XtEVNBG5G0EraYM4vZDd2+1mtPirIFi0Vxgu\/SQD5I5xC5IV2YV+aAQCOi4LYhd+TpJ5XugvY9nYzdPKn4hA+g+AHt2Mp936HaQPKP2F7jSC5x5\/ZFwm2M7pcFrp8FKINVzzTPCtrkhXln736N0w2sIPwRJ6LYNyAt3Y3Pe37Y5fKruP78yszKmAL2aJ4NuvME\/9H9AGFPu8s=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNq1UdFqAjEQfBf8h+CTUuoHFLmnQpFSOGj7AdtkvYYmu2Gz1\/bQ\/rt3ntKzFsEH93FmMpnZtQFyvvdQCcTxyLRjO8SU0EQkLYUt5sxi1j3bzWLhSVFWYLEofuGb1Iv3T6cQuSadmTfmgEADoeCqJnfQ6Tct3R\/Zz3g0TPOs4hM+gOIXNMMotx1DlYHkH7E5xZFc4jbtq4TrBN19Frh6EaAMVj3TNCtonWfmk737t05rWEI4Uyei2HcgXborr\/d4sfP5pji9\/J2ZPCFVPqaAHQPZfwBNeoPjKhcZbAEHAsMh\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">classDiagram\r\n    class PaymentProcessor {\r\n        &lt;&lt;interface&gt;&gt;\r\n        +processPayment(amount) boolean\r\n        +refundPayment(txnId) boolean\r\n    }\r\n\r\n    class StripeGateway {\r\n        -String apiKey\r\n        -String endpointUrl\r\n        +processPayment(amount) boolean\r\n        +refundPayment(txnId) boolean\r\n        -logTransaction(status) void\r\n    }\r\n\r\n    class PayPalGateway {\r\n        -String merchantId\r\n        +processPayment(amount) boolean\r\n        +refundPayment(txnId) boolean\r\n    }\r\n\r\n    StripeGateway ..|&gt; PaymentProcessor : \"Mengimplementasikan\"\r\n    PayPalGateway ..|&gt; PaymentProcessor : \"Mengimplementasikan\"<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNq1UdFqAjEQfBf8h+CTUuoHFLmnQpFSOGj7AdtkvYYmu2Gz1\/bQ\/rt3ntKzFsEH93FmMpnZtQFyvvdQCcTxyLRjO8SU0EQkLYUt5sxi1j3bzWLhSVFWYLEofuGb1Iv3T6cQuSadmTfmgEADoeCqJnfQ6Tct3R\/Zz3g0TPOs4hM+gOIXNMMotx1DlYHkH7E5xZFc4jbtq4TrBN19Frh6EaAMVj3TNCtonWfmk737t05rWEI4Uyei2HcgXborr\/d4sfP5pji9\/J2ZPCFVPqaAHQPZfwBNeoPjKhcZbAEHAsMh\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNq1UUFqw0AMvAfyhyWnhNI8IASfAsX0Ymj7AHVXcRd2pUUrtzVp\/147ToiTlNJLdBzNSDOSDZDzxkMtEKcT05XtEVNBG5G0EraYM4vZDd2+1mtPirIFi0Vxgu\/SQD5I5xC5IV2YV+aAQCOi4LYhd+TpJ5XugvY9nYzdPKn4hA+g+AHt2Mp936HaQPKP2F7jSC5x5\/ZFwm2M7pcFrp8FKINVzzTPCtrkhXln736N0w2sIPwRJ6LYNyAt3Y3Pe37Y5fKruP78yszKmAL2aJ4NuvME\/9H9AGFPu8s=\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"dKUznWo\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-621\" decoding=\"async\" height=\"480\" loading=\"lazy\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19031bd8def.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19031bd8def.png 751w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19031bd8def-300x192.png 300w\" width=\"751\"\/><\/p>\n<p><strong>Analisis Sintaks:<\/strong> Tag <code>&lt;&lt;interface&gt;&gt;<\/code> dengan jelas menandai `PaymentProcessor` sebagai kontrak arsitektur tingkat tinggi. Dua kelas implementasi gateway konkret menggunakan bidang pribadi (<code>-apiKey<\/code>) untuk kredensial sensitif, sementara mengekspos rutin pembayaran publik (<code>+processPayment<\/code>) yang terhubung melalui panah realisasi (<code>..|&gt;<\/code>).<\/p>\n<h3>Contoh 2: Mesin Pemrosesan Pesanan Perusahaan (Komposisi &amp; Multiplicity)<\/h3>\n<p>Rancangan sistem canggih ini memetakan skema manajemen pesanan e-commerce yang kompleks, menunjukkan cara mendokumentasikan kepemilikan struktural dan jumlah objek di antara berbagai kelas yang saling terhubung.<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNp1UctqAzEMvAfyD8KnNmEDufZQKJtLTi2k\/QDVFqnBj62spYTQf6\/3kcTbbX2wYEbjGcnaYUo7i0dGv1xAPrpDoG6TRE8M5wHtztoGAT0Se1MQB2EbjhDQU4E2DjU9syG+u4e+DuT3clFa9czMJ3boxGSHQmDyVTPlu6Cq0T\/riAO6g6C0qZBqdLp1WfQaBV1OY2L77uj\/OHshP4tkMzhJ1IGfLQaxcirg4XFo2Gp6IX4LVv50ejKGKdfzfJNJmEjmuJ46jWgTUx6rjub3RNdfVFsFVRVBeQwnNa78AVT8CkkNvbe51XazWXX9q153bdbRZye6CC7xh7cfb33pwzYJJKofTEiiUg==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNp1kU1LAzEQhu+F\/ochJ61soVcPgrSXnhSqP2CaDEvYfKyzk0Mp\/nezH9qsqzkk8Lx5551JtMOuO1isGf16BXnpnsA+dRI9MVxH2q8HGwT0JBxNIZyEbaghoKeCtg41vbAhvruH4RzFz\/WqjBqURU7s6SzkgEJg8rZnynshVVN+9hEHdCdBSV1h1eh0ctn0FgVd7sbEdHb0fztHIb9oyWY466iHHwmDWLkUeCwOLVtNr8TvwcqfSc\/GMOXzunzJTphIllzPkybaxi6PtY\/m90Q\/v6h2CqoqgjpjuGCjpkd\/BOXJW2cbq0bHbXq12243vWszuAtDqDGYFOrJ8j3GmPF0u2lyWbYeGlJfA2OmBw==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">classDiagram\r\n    class Customer {\r\n        +int customerId\r\n        +String name\r\n        +placeOrder() Order\r\n    }\r\n\r\n    class Order {\r\n        +int orderId\r\n        +Date dateCreated\r\n        -String internalStatus\r\n        +calculateTotal() double\r\n    }\r\n\r\n    class OrderItem {\r\n        +int itemId\r\n        +int quantity\r\n        +double pricePerUnit\r\n    }\r\n\r\n    class Address {\r\n        +String street\r\n        +String city\r\n        +String postalCode\r\n    }\r\n\r\n    Customer \"1\" --o \"banyak\" Order : \"memiliki\"\r\n    OrderItem \"1..*\" --* \"1\" Order : \"mengandung\"\r\n    Address \"1\" --&gt; Order : \"dikirim ke\"<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNp1kU1LAzEQhu+F\/ochJ61soVcPgrSXnhSqP2CaDEvYfKyzk0Mp\/nezH9qsqzkk8Lx5551JtMOuO1isGf16BXnpnsA+dRI9MVxH2q8HGwT0JBxNIZyEbaghoKeCtg41vbAhvruH4RzFz\/WqjBqURU7s6SzkgEJg8rZnynshVVN+9hEHdCdBSV1h1eh0ctn0FgVd7sbEdHb0fztHIb9oyWY466iHHwmDWLkUeCwOLVtNr8TvwcqfSc\/GMOXzunzJTphIllzPkybaxi6PtY\/m90Q\/v6h2CqoqgjpjuGCjpkd\/BOXJW2cbq0bHbXq12243vWszuAtDqDGYFOrJ8j3GmPF0u2lyWbYeGlJfA2OmBw==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNp1UctqAzEMvAfyD8KnNmEDufZQKJtLTi2k\/QDVFqnBj62spYTQf6\/3kcTbbX2wYEbjGcnaYUo7i0dGv1xAPrpDoG6TRE8M5wHtztoGAT0Se1MQB2EbjhDQU4E2DjU9syG+u4e+DuT3clFa9czMJ3boxGSHQmDyVTPlu6Cq0T\/riAO6g6C0qZBqdLp1WfQaBV1OY2L77uj\/OHshP4tkMzhJ1IGfLQaxcirg4XFo2Gp6IX4LVv50ejKGKdfzfJNJmEjmuJ46jWgTUx6rjub3RNdfVFsFVRVBeQwnNa78AVT8CkkNvbe51XazWXX9q153bdbRZye6CC7xh7cfb33pwzYJJKofTEiiUg==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Edit Mermaid di VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"nhNYQKB\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-622\" decoding=\"async\" height=\"450\" loading=\"lazy\" sizes=\"auto, (max-width: 731px) 100vw, 731px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190321054b5.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190321054b5.png 731w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190321054b5-300x185.png 300w\" width=\"731\"\/><\/p>\n<p><strong>Analisis Sintaks:<\/strong>Contoh ini menggambarkan perbedaan antara agregasi dan komposisi. Panah berlian padat (<code>--*<\/code>) menunjukkan bahwa `OrderItem` terikat erat dengan `Order` (jika pesanan dihapus, item baris individu yang terkait juga akan dihancurkan). Sebaliknya, panah berlian jelas (<code>--o<\/code>) menunjukkan bahwa `Customer` memiliki beberapa pesanan, tetapi kedua entitas tersebut dapat ada secara independen. String multiplicity (seperti <code>\"1..*\"<\/code>) mendefinisikan persyaratan hubungan sistem.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apa itu Diagram Kelas? Sebuah Diagram Kelas adalah struktur diagram UML yang memvisualisasikan arsitektur statis dari sistem perangkat lunak berorientasi objek. Sebagai jenis diagram UML yang tak tergantikan, jenis diagram UML, diagram ini memetakan kelas-kelas individu, antarmuka, dan model data&#8230;<\/p>\n","protected":false},"author":4,"featured_media":2112,"parent":0,"menu_order":2,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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