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I've been asked many times to create a program that handles Java collision detection with polygons. This is a continuation of my tutorial on how to make a Java video game and if you haven't been watching you should check it out.

It is surprisingly easy to handle collision detection with polygons. All you have to do is surround all of your polygons with rectangles and a handy dandy method named intersects handles pretty much everything else!

Get the Code: http://goo.gl/EYGnQ

Best Design Patterns Book : http://goo.gl/W0wyie

Welcome to my Observer Design Pattern Tutorial. I cover a lot in this tutorial including the Observer pattern, how to use it with threads and much more.

The Observer pattern is a software design pattern in which an object, called the subject (Publisher), maintains a list of its dependents, called observers (Subscribers), and notifies them automatically of any state changes, usually by calling one of their methods.

Get the Code: http://goo.gl/6WsAQ

Best Design Patterns Book : http://goo.gl/W0wyie

Welcome to my Adapter Design Pattern Tutorial! This is a very easy design pattern to grasp and put into use.

This pattern is used when you want to translate one interface of a class into another interface. Now, it makes sense that these 2 interfaces are compatible otherwise the pattern may not make sense. To accomplish this, all you need to do is bridge the differences using our old friend composition again.

Watch the video and look at the code and you'll get it.

Get the game code: http://goo.gl/OKMBp

In the last part of this tutorial I showed you how to make the PhotonTorpedo class using a UML class diagram.

In this tutorial, I show you how to make your space ship shoot the torpedos on the screen. As you'll see, because I used good OOP design principles in the last video, adding the shooting feature will require very few changes.

All of the code above is heavily commented to help you learn.

Code is Here: http://goo.gl/jaonq
Best Design Patterns Book : http://goo.gl/W0wyie
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Here I begin my design patterns video tutorial. I have talked a great deal about OOP design principles in the past. I've shown you how to turn requirements into a UML diagram. Then I covered how to turn a UML diagram into a class.

This tutorial will start off by revisiting OOP concepts. I'll also provide answers to the most common questions I receive.

By the end, you'll be able to use design patterns to solve common software design problems.

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*Watch More Learn in One Videos*
►► Java - https://youtu.be/n-xAqcBCws4
►► C++ - https://youtu.be/Rub-JsjMhWY
►► Python - https://youtu.be/N4mEzFDjqtA
►► MySQL - https://youtu.be/yPu6qV5byu4
►► PHP - https://youtu.be/7TF00hJI78Y
►► Kotlin - https://youtu.be/H_oGi8uuDpA
►► C# - https://youtu.be/lisiwUZJXqQ
►► JavaScript - https://youtu.be/fju9ii8YsGs

Get the Code: http://goo.gl/0yVzM

Best Design Patterns Book : http://goo.gl/W0wyie

Welcome to my Singleton Design Pattern Tutorial. The Singleton pattern is both easy to understand as well as useful. I'll demonstrate first how to implement the Singleton pattern. Then I'll provide and example of its usefulness with a Scrabble example.

Threads can sometimes play havoc with this pattern, so I'll show you how to avoid those problems. I'll also review how to use threads, LinkedLists and more.