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Java

Design Patterns: Strategy

The Strategy design pattern belongs to Behavioral family. It helps us to change behavior at runtime. The definition from Gang of Four book is following. We use Strategy pattern when we need to hide the implementation of an algorithm. When we have many related classes which differ in their behavior providing a way to configure…

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Design Patterns: Bridge

One more design pattern, which is lying under Structural Patterns family, is named Bridge. Let’s see the Bridge definition as expressed from GoF book. Let’s start analyzing abstraction to gain insight into Bridge pattern. When we talk about abstraction we mean that we want to hide the mechanism and the details of how something is…

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Design Patterns: Composite

The Composite is another design pattern that belongs to Structural Patterns family. We use this pattern when we want to group components inside a larger component. In other words, we can built a hierarchy of objects. A definition by GoF: A basic structure of Composite pattern: Component Declares an interface for objects in the composition….

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Design Patterns: Facade

Facade design pattern is known as a structural design pattern. Facade pattern is used to reduce complexity among classes. One way to achieve this goal is by providing a simplified interface to implement general facilities among objects. That means, we can use facade in order to describe and implement actions of objects. We can write…

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LibGDX: Scene2d – Actors Part 1

Scene2d is a higher level framework for creating games. It’s not mandatory to use it but sometimes it is very useful because code is more friendly and simpler. It is indicated for menu, buttons, checkboxes etc. but it’s useful for board games, character’s equipment and more. Scene2d is composed of 3 classes regarding Scene2d :…

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Design Patterns: Dependency Injection

What Dependency Injection is. Let’s imagine an object that does a specific function. Now let’s imagine a second object that takes the first object as an argument. This object cannot function or can function partially without the first one. When this happens, it’s called Dependency Injenction. Dependency Injection is a design pattern and we want…

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