Mengategorikan Pola Desain
Pelajari tiga kategori utama: pola Penciptaan, Struktural, dan Perilaku, serta perannya dalam arsitektur perangkat lunak.
Mengategorikan Pola Desain adalah pelajaran Clean Architecture & Design Patterns in Practice gratis di CoddyKit. Ini adalah pelajaran 2 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar Clean Architecture & Design Patterns in Practice, dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus Clean Architecture & Design Patterns in Practice mencakup 4 pelajaran total.
Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.
Organizing Design Patterns
Welcome back! In our last lesson, we learned what design patterns are. Now, let's explore how they are organized.
Just like books in a library, design patterns are grouped into categories. This helps us understand their purpose and when to use them effectively.
The Three Main Categories
Design patterns are traditionally divided into three main categories. Each category addresses a different type of problem in software design:
- Creational Patterns: Deal with object creation.
- Structural Patterns: Focus on object composition and relationships.
- Behavioral Patterns: Concern object interaction and responsibilities.
Let's dive into each one!
Creational Patterns: Object Creation
Creational patterns are all about how objects are created. They aim to provide flexible and controlled ways to instantiate objects, rather than using direct constructors.
This helps make a system independent of how its objects are created, composed, and represented. They make your code more adaptable to change.
Creational Example: Simple Creator
Imagine you need to create different types of reports. A creational pattern might use a method to decide which report type to build, instead of you calling `new` directly.
Try running this simple example:
public class Main {
public static String createReport(String type) {
if ("PDF".equals(type)) {
return "Generating PDF Report...";
} else if ("CSV".equals(type)) {
return "Generating CSV Report...";
}
return "Unknown Report Type.";
}
public static void main(String[] args) {
System.out.println(createReport("PDF"));
System.out.println(createReport("CSV"));
}
}Structural Patterns: Composition
Structural patterns deal with the composition of classes and objects. They help you assemble objects and classes into larger, more flexible structures.
These patterns focus on how objects are related to each other, often by identifying simple ways to realize relationships between entities.
Structural Example: Object Assembly
Structural patterns are like building blocks. They show how to combine objects to form new functionalities. Think of a computer having a CPU and RAM.
Run this code to see a simple composition:
public class Main {
static class CPU {
String process() { return "CPU processing..."; }
}
static class Computer {
private CPU cpu; // Computer HAS-A CPU (composition)
public Computer() {
this.cpu = new CPU();
}
public String start() {
return cpu.process() + " Computer booting up.";
}
}
public static void main(String[] args) {
Computer myPC = new Computer();
System.out.println(myPC.start());
}
}Behavioral Patterns: Object Interaction
Behavioral patterns are concerned with algorithms and the assignment of responsibilities between objects. They describe how objects communicate and interact with each other.
These patterns help ensure that objects can work together efficiently and flexibly, managing complex processes and interactions.
Behavioral Example: Simple Action
Behavioral patterns often define how an action is performed or how objects respond to requests. Here's a simple example of a light switching on and off:
Run the code to see the light's behavior:
public class Main {
static class Light {
private boolean isOn = false;
public String toggle() {
isOn = !isOn;
if (isOn) {
return "Light is now ON.";
} else {
return "Light is now OFF.";
}
}
}
public static void main(String[] args) {
Light livingRoomLight = new Light();
System.out.println(livingRoomLight.toggle()); // First toggle
System.out.println(livingRoomLight.toggle()); // Second toggle
}
}Why Categorize Patterns?
Categorizing design patterns helps you in several ways:
- Easier Search: If you know you need to solve an object creation problem, you can focus on Creational patterns.
- Better Understanding: It clarifies the primary purpose and scope of a pattern.
- Improved Communication: Teams can discuss patterns using a common language based on their categories.
It's a powerful tool for navigating the world of design patterns!
Categorization Check
Which category of design patterns primarily focuses on how objects are put together to form larger structures?
Recap: The Pattern Categories
Great job! In this lesson, we explored the three main categories of design patterns:
- Creational: For flexible object creation.
- Structural: For building larger, more flexible object compositions.
- Behavioral: For managing object interactions and responsibilities.
Understanding these categories is your first step to mastering design patterns. Next, we'll see how these patterns appear in everyday coding!
Pertanyaan yang Sering Diajukan
Apakah pelajaran “Mengategorikan Pola Desain” gratis?
Ya — teks lengkap “Mengategorikan Pola Desain” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus Clean Architecture & Design Patterns in Practice, upgrade ke CoddyKit PRO. Kursus Clean Architecture & Design Patterns in Practice mencakup 4 pelajaran total.
Apa yang akan aku pelajari di “Mengategorikan Pola Desain”?
Pelajari tiga kategori utama: pola Penciptaan, Struktural, dan Perilaku, serta perannya dalam arsitektur perangkat lunak. Kamu berlatih Clean Architecture & Design Patterns in Practice dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.
Apakah aku perlu pengalaman untuk memulai Clean Architecture & Design Patterns in Practice?
Tidak diperlukan pengalaman sebelumnya. Clean Architecture & Design Patterns in Practice di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 2 dari 4.
Berapa lama pelajaran “Mengategorikan Pola Desain” memakan waktu?
Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.
Bisakah aku menulis dan menjalankan kode dalam pelajaran Clean Architecture & Design Patterns in Practice ini?
Ya. Setiap pelajaran Clean Architecture & Design Patterns in Practice menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.
Semua pelajaran dalam kursus ini
- Apa Itu Pola Desain?
- Mengategorikan Pola Desain
- Pola dalam Pengodean Sehari-hari
- Anti-Pattern dan Biaya Penyalahgunaan Pattern