Structural Design Patterns in Java | Adapter | Decorator | Proxy (Full One Shot)

Just like Pattern Matching in modern Java provides clean, type-safe access to data, structural design patterns give you clean, type-safe access to object composition. Master all three essential Structural Design Patterns — Adapter, Decorator, and Proxy — in this single, complete one-shot tutorial. The Adapter Design Pattern is a structural design pattern that lets incompatible interfaces work together. It acts as a bridge, translating calls between a client expecting one interface and a service providing another, allowing them to collaborate without either one changing — critical for integrating legacy payment gateways or wiring up third-party APIs in modern Java applications. Moving to the Decorator Design Pattern, you'll learn how to wrap objects with additional responsibilities at runtime. Using a pizza analogy to build intuition before diving into hands-on coding, you'll see how the decorator pattern implementation avoids subclass explosion, leading to clean and flexible code. A second Hotel Room Decorator example mirrors real production scenarios where features need to be composed at runtime without touching existing code. Finally, the Proxy Design Pattern acts as a controlled placeholder for another object. You'll implement three real-world variants hands-on in IntelliJ IDEA: Virtual Proxy for lazy loading, Protection Proxy for access control, and Remote Proxy for representing objects across address spaces — and understand why a simple flag can never replace a proper proxy pattern Java approach. 📂 What You'll Learn: • Adapter Design Pattern — bridging incompatible interfaces with real-world Java examples • Decorator Design Pattern — dynamic object composition (Pizza & Hotel Room examples) • Proxy Design Pattern — Virtual, Protection & Remote proxies with hands-on coding • Why simple flags and hacks can't replace proper design pattern approaches • Real-world low-level design scenarios for Java developer interviews 00:00:00 : Structural Design Pattern Introduction 00:00:38 : Adapter Design Pattern 00:18:39 : Decorator Design Pattern 00:44:54 : Proxy Design Pattern To access the code: Clone below mentioned repository and checkout to branch : adapter-pattern Github Link: https://github.com/TheCuriousCoder-sg... To access the code: Clone below mentioned repository and checkout to branch : decorator-pattern Github Link: https://github.com/TheCuriousCoder-sg... To access the code: Clone below mentioned repository and checkout to branch : proxy-pattern Github Link: https://github.com/TheCuriousCoder-sg... #JavaInterviewQuestions #DesignPatterns #Java #StructuralDesignPatterns #AdapterDesignPattern #DecoratorDesignPattern #ProxyDesignPattern #DesignPatternsInJava #SoftwareDesignPatterns #LowLevelDesign #SystemDesign #JavaDeveloper #CodingInterview #DesignPatternInterviewQuestions #DesignPatternsTutorial Instagram :   / the.curious_coder