Programming: Theory and Practice
Programming in Java: studying coding, problem solving, troubleshuting, lifehuck, basics and art of code creation. Become a real developer after studying the materials of our blogs. Create your own programming blog to learn other members of the social network!
JavaScript & HTML5: Implementing the 2D Physics Engine Core
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- Written by Денис
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In the previous article, you implemented functionality to support basic drawing operations. Drawing is the first step to constructing your physics engine because it allows you to observe the output while continuing to expand the engine’s capabilities. In this article, two critical components for 2D physics simulations, the core engine loop and rigid shape class, will be examined and added to the engine. The core engine loop, or the engine loop, allows the engine to control and handle the real-time interaction of game objects, while the rigid shape class abstracts and hides the detailed information such as positions and rotation angles that are required for future physics calculations.
JavaScript & HTML5: Introduction to 2D Game Physics Engine Development
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- Written by Денис
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Physics engines play an important part in many types of games. A believable physics interaction between game objects has become a key element of most modern PC and console games as well as, more recently, browser and smartphone games. The range of topics within physics for games is broad and includes, but is not limited to, areas such as rigid body, fluid dynamics, soft-body, vehicle physics, and particle physics. This article will cover the fundamental topics needed for you to get started in understanding and building a general purpose, rigid body physics engine in two dimensions. The blog also aims to provide you with a reusable game physics engine, which can be used for your own games, by guiding you through the process of building a physics engine step-by-step from scratch. This way you will gain a foundational understanding of the concepts and components required for a typical 2D rigid body system.
Good Programs Are: Effective, Robust, Efficient and Maintainable
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- Written by Antoni
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… as observed by Nick Gonzalez. A good program is effective: it solves the problem it is supposed to solve. A good program must not crash when it receives bad inputs from users: it is robust. Good programs are efficient: it does the job it is supposed to do quickly. Since the requirements for a program may change over time, a good program should be maintainable, so it can be modified easily when requirements do change. A program can only be maintainable, if its code is written in a clear manner.
Comparing Java with JavaScript
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- Written by Antoni
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As opposed to Java, JavaScript is relatively easy to learn. One reason for this is the need of explicit type definitions for variables, parameters and return values in Java, which are not needed in JavaScript.
Both Java and JavaScript are “object-oriented” programming languages, but JavaScript is even more “object-oriented” than Java, which is rather “class-oriented”. There is no explicit class concept in JavaScript. Classes have to be defined in the form of special objects. However, objects can also be created without instantiating a class, and properties as well as methods can be defined for specific objects independently of any class definition.
Designing a Successful Android Application
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- Written by Masha
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This blog is about design guidelines for writing imaginative and useful Android applications. Several recipes describe specific aspects of successful design. This article will list some others.
One purpose of this article is to explain the benefits of developing native Java Android applications over other methods of delivering rich content on mobile devices.
Java command-line application: build your first RESTful client
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- Written by Aaltonen
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Connecting to a RESTful web service takes no more work than directly connecting to the service through an HTTP connection. For our first RESTful client, we'll use the command line to connect to Twitter's RESTful web service, which returns the last 20 public status updates.
Types of JDBC drivers and MySQL database connection example
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- Written by egurutol
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Java is a pure object-oriented programming (OOP) language while relational databases use sequential programming language (SQL). Both of them have their own data type, methods and programming techniques. OOP manages objects where SQL manages tables. It is pretty clear that both of them cannot communicate directly with each other due to the unavailability of compatible language support. Direct communication is not possible so the unit is required to make them communicate even though these two are fundamentally different. The Java Database Connectivity (JDBC) architecture will be managed by JDBC APIs from a Java application which helps to manage the incompetency. The one which manages the language and data type difference is DriverManager. The following figure illustrates this:
Java Persistence Layer: taking data from the user & saving it
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- Written by egurutol
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Data storage is a very common and basic requirement of enterprise applications. Data storage ensures that the data collected from the user will be saved over time. The mechanism of saving data for the duration so as to make it available later is called persistency.
In Java, normally the persistency is of an object. Java can save an object state using the following ways:
Raspberry Pi Introduction: preparation, installation, first application
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- Written by c0re
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In this blog I’ll walk you through the process of setting up (or baking, if you will) your Raspberry Pi.
This article will take you through a first-time installation of Raspbian on a Raspberry Pi with the latest Java version. I will also detail some additional configuration that you may want to change to optimize Java and other visual applications. Finally, I will show you how to create a network between your Raspberry Pi and another machine and run a simple Java application.