Gain insights into software design patterns to create extensible, maintainable, and flexible code. Explore real-world examples in Java and enhance your problem-solving and architectural skills.

Being good at problem-solving is one thing but to take your career to the next level, one must know how complex software projects are architected. Software design patterns provide templates and tricks used to design and solve recurring software problems and tasks.  Applying time-tested patterns result in extensible, maintainable and flexible high-quality code, exhibiting superior craftsmanship of a software engineer. Being well-versed in knowledge of design patterns allows one to spot brittle and immature code from miles away. The course goes to great lengths to lay bare the esoteric concepts of various design patterns before the reader and is replete with real-world examples and sample code.
The readership for this course is expected to be familiar with some object orientated language. The course examples and snippets are written in the Java language but folks with experience in other OOP languages should easily be able to follow the discussion and code intent.

Software Design Patterns: Best Practices for Software Developers

<div class="card-quiz">
   <h2>Introduction</h2>
    <div class="ans">
<p>Design patterns for object orientated programs are divided into three broad categories listed below. These are the same categories used by GoF in their seminal work on design patterns.</p>
<ul>
  <li>Creational</li>
  <li>Structural</li>
  <li>Behavioural</li>
</ul>
<p>Each of these are explained below</p>
     
   </div>
</div>

<div class="card-quiz">
   <h2>Creational</h2>
    <div class="ans">
<p>Creational design patterns relate to how objects are constructed from classes. New-ing up objects may sound trivial but unthoughtfully littering code with object instance creations can lead to headaches down the road. The creational design pattern come with powerful suggestions on how best to encapsulate the object creation process in a program.
<ul>
<li>Builder Pattern</li>
<li>Prototype Pattern</li>
<li>Singleton Pattern</li>
<li>Abstract Factory Pattern</li>
</ul>
    </div>
</div>

<div class="card-quiz">
   <h2>Structural</h2>
    <div class="ans">
<p>Structural patterns are concerned with the composition of classes i.e. how the classes are made up or constructed. These include:
<ul>
<li>Adapter Pattern</li>
<li>Bridge Pattern</li>
<li>Composite Pattern</li>
<li>Decorator Pattern</li>
<li>Facade Pattern</li>
<li>Flyweight Pattern</li>
<li>Proxy Pattern</li>
</ul>
</p>
    </div>
</div>

<div class="card-quiz">
   <h2>Behavioral</h2>
    <div class="ans">
<p>Behavioral design patterns dictate the interaction of classes and objects amongst eachother and the delegation of responsibility. These include:</p>
<ul>
<li>Interpreter Pattern</li>
<li>Template Pattern</li>
<li>Chain of Responsibility Pattern</li>
<li>Command Pattern</li>
<li>Iterator Pattern</li>
<li>Mediator Pattern</li>
<li>Memento Pattern</li>
<li>Observer Pattern</li>
<li>State Pattern</li>
<li>Strategy Pattern</li>
<li>Visitor Pattern</li>
</ul>
</p>
 </div>
</div>

<div class="card-quiz">
   <h2>Examples</h2>
    <div class="ans">
<p>For most of the patterns, we borrow concepts from the aviation industry to create our examples. You'll find the course regularly talking about F-16s and Boeings to elaborate aspects of the pattern under discussion.</p>
     </div>
</div>

<div class="card-quiz">
   <h2>For Interview Prep</h2>
    <div class="ans">
<p>For folks, who are rushing through the course for an upcoming interview, I would suggest going through all the <b>creational design patterns</b>, <b>decorator</b>, <b>proxy</b>, <b>iterator</b>, <b>observer</b> and <b>visitor</b> patterns. As you read through them, be sure to look at the Java framework's api examples pointed out in each lesson.</p>
     </div>
</div>


<div>
   <h2>Introduction</h2>
    <div>
<p>Design patterns for object orientated programs are divided into three broad categories listed below. These are the same categories used by GoF in their seminal work on design patterns.</p>
<ul>
  <li>Creational</li>
  <li>Structural</li>
  <li>Behavioural</li>
</ul>
<p>Each of these are explained below</p>
     
   </div>
</div>

<div>
   <h2>Creational</h2>
    <div>
<p>Creational design patterns relate to how objects are constructed from classes. New-ing up objects may sound trivial but unthoughtfully littering code with object instance creations can lead to headaches down the road. The creational design pattern come with powerful suggestions on how best to encapsulate the object creation process in a program.
<ul>
<li>Builder Pattern</li>
<li>Prototype Pattern</li>
<li>Singleton Pattern</li>
<li>Abstract Factory Pattern</li>
</ul>
    </div>
</div>

<div>
   <h2>Structural</h2>
    <div>
<p>Structural patterns are concerned with the composition of classes i.e. how the classes are made up or constructed. These include:
<ul>
<li>Adapter Pattern</li>
<li>Bridge Pattern</li>
<li>Composite Pattern</li>
<li>Decorator Pattern</li>
<li>Facade Pattern</li>
<li>Flyweight Pattern</li>
<li>Proxy Pattern</li>
</ul>
</p>
    </div>
</div>

<div>
   <h2>Behavioral</h2>
    <div>
<p>Behavioral design patterns dictate the interaction of classes and objects amongst eachother and the delegation of responsibility. These include:</p>
<ul>
<li>Interpreter Pattern</li>
<li>Template Pattern</li>
<li>Chain of Responsibility Pattern</li>
<li>Command Pattern</li>
<li>Iterator Pattern</li>
<li>Mediator Pattern</li>
<li>Memento Pattern</li>
<li>Observer Pattern</li>
<li>State Pattern</li>
<li>Strategy Pattern</li>
<li>Visitor Pattern</li>
</ul>
</p>
 </div>
</div>

<div>
   <h2>Examples</h2>
    <div>
<p>For most of the patterns, we borrow concepts from the aviation industry to create our examples. You'll find the course regularly talking about F-16s and Boeings to elaborate aspects of the pattern under discussion.</p>
     </div>
</div>

<div>
   <h2>For Interview Prep</h2>
    <div>
<p>For folks, who are rushing through the course for an upcoming interview, I would suggest going through all the <b>creational design patterns</b>, <b>decorator</b>, <b>proxy</b>, <b>iterator</b>, <b>observer</b> and <b>visitor</b> patterns. As you read through them, be sure to look at the Java framework's api examples pointed out in each lesson.</p>
     </div>
</div>


This lesson lists the most used and familiar design patterns

Start

Creational Patterns

Structural Patterns

Behavioral Patterns

The End

Types of Design Patterns

Introduction

Creational