설계 패턴 분류
생성, 구조, 행동이라는 세 가지 주요 범주와 소프트웨어 아키텍처에서 각 범주의 역할을 알아봅니다.
설계 패턴 분류은(는) CoddyKit의 무료 Clean Architecture & Design Patterns in Practice 강의입니다. 이것은 4개 중 2번째 강의입니다. 아래에서 전체 강의를 무료로 읽을 수 있으며, 내장 코드 에디터와 24/7 AI 튜터와 함께 브라우저에서 직접 실습할 수 있습니다. 이 강의는 Clean Architecture & Design Patterns in Practice 학습 경로의 일부이며, 진행 상황이 웹과 CoddyKit 앱에 동기화됩니다. Clean Architecture & Design Patterns in Practice 강의에는 총 4개의 강의가 포함되어 있습니다.
이 강의의 일부는 아직 번역되지 않았으며 영어로 표시됩니다.
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!
자주 묻는 질문
“설계 패턴 분류” 강의는 무료인가요?
네 — “설계 패턴 분류” 전체 내용을 이 웹사이트에서 무료로 읽을 수 있습니다. 인터랙티브하게 실습하려면(내장 코드 에디터와 24/7 AI 튜터), CoddyKit PRO로 업그레이드하면 Clean Architecture & Design Patterns in Practice 강의 전체를 잠금 해제할 수 있습니다. Clean Architecture & Design Patterns in Practice 강의에는 총 4개의 강의가 포함되어 있습니다.
“설계 패턴 분류”에서 뭘 배우나요?
생성, 구조, 행동이라는 세 가지 주요 범주와 소프트웨어 아키텍처에서 각 범주의 역할을 알아봅니다. 브라우저에서 직접 실행하는 실습 코드로 Clean Architecture & Design Patterns in Practice을(를) 배우며, 24/7 AI 튜터가 강의를 진행하면서 질문에 답변해줍니다.
Clean Architecture & Design Patterns in Practice을(를) 시작하는 데 경험이 필요한가요?
사전 경험은 필요하지 않습니다. CoddyKit의 Clean Architecture & Design Patterns in Practice은(는) 초급자부터 고급 학습자까지를 위해 구성되어 있으므로, 여기서 시작하거나 처음부터 시작할 수 있으며 자신의 속도대로 진행할 수 있습니다. 이것은 4개 중 2번째 강의입니다.
“설계 패턴 분류” 강의는 얼마나 걸리나요?
대부분의 CoddyKit 강의는 약 5~10분이 소요됩니다. 각 강의는 간결하고 인터랙티브하여 꾸준한 진행이 가능하며, 웹과 앱에서 중단한 부분부터 바로 시작할 수 있습니다.
이 Clean Architecture & Design Patterns in Practice 강의에서 코드를 작성하고 실행할 수 있나요?
네. 모든 Clean Architecture & Design Patterns in Practice 강의에는 내장 코드 에디터가 포함되어 있으므로, 브라우저에서 바로 실제 코드를 작성하고 실행한 후 즉시 AI 피드백을 받을 수 있습니다 — 로컬 설정이 필요 없습니다.