Apache POI: Usage of formulas and excel functions

In order to manipulate formulas in Apache POI, we use the method setCellFormula(“formula”) of HSSFCell class. Similar to Microsoft Excel, we can use mathematics formulas (A1+B2+C3, B5*A2, …) and Excel’s functions (SUM, COUNT, MAX, …). When we use excel functions, Continue reading Apache POI: Usage of formulas and excel functions

How to smooth textures when they are resized in LibGDX (filters I)

When working with LibGDX, we normally use a “vitual” screen (whether through using Viewports or with transformation matrices) with a defined dimensions, and all textures / images will have a size according to that virtual dimensions. If the viewport size Continue reading How to smooth textures when they are resized in LibGDX (filters I)

How to generate MS Excel files from Java with Apache POI

Commonly it’s necessary to manage Microsoft Excel files from Java applications. It can be usefull, for example, to export / import data, report generation, etc. Apache POI is a library from Apache fundation, which has become a de facto standard Continue reading How to generate MS Excel files from Java with Apache POI

How to add event listeners to a button in Cocos2d-x 3.x and C++

Recently I have started a port to iOS of my game Dark Snake, originally made for Android. I want to take this opportunity to learn something about C++, so I have decided to use the game engine Cocos2d-x. Probably, which Continue reading How to add event listeners to a button in Cocos2d-x 3.x and C++