B4J Tutorials

A friend of mine created a docker image for me to debug apps on my server quickly and easily.
I am happy to share this with you.

https://hub.docker.com/r/o0shojo0o/b4jbridge

 

This example is based on: https://scikit-learn.org/stable/auto_examples/linear_model/plot_ols.html
The steps are:

1. Read the CSV file with StringUtils.
2. Take the BMI and target columns...

 

1, Download VSCode to edit the Python source files (you get hints etc)
2, Put the Python source code in files directory. (set external tool to VSCode for easy editing)
3, Run the code from...

 

Sure you will figure it out. Four rotating/pivoting arms of different length and rotating at different speeds (some CW and some CCW) to make all kinds of interesting drawings. Change the speed /...

 

This example uses B4X,

• specifically MiniHTML library
• cross over HTMX to generate interactive HTML
• based on Modal Dialogs in Bootstrap example on HTMX website
• to...

 

I recently spent half a day on a wild goose chase trying to find out what was going on with SQLCipher, while the issue turned out to be B4XTable.b4xlib containing an #AdditionalJar for...

 

 

To run a B4J console or GUI Application on any 32-bit or 64-bit ARM computer, follow these steps:

Have tested it on Raspberry Pi 4 and Orange Pi Zero 3, 2W running Ubuntu 21.04 and 22.04...

 

Introduction
At the time of writing, MiniORMUtils is version 1.14 and Web API Server v3 is version 3.00.
MiniORMUtils support SQLite and MySQL databases.
We don't need to write...

 

Hi there,

I am sharing my example Google Image Downloader using Selenium and to be more specific Pnd_Selenium lib (from Pendrush) that you can find here...

 

Ola

I just ran into this link, https://www.keycdn.com/blog/web-development-tools

And besides XAMPP, which I have been using for my personal web development projects, there is Laragon...

 

Hi Fam

Download

You will recall that we did a tutorial on MySQL back-ends using a plug n play CRUD REST API (Related Topics below)

This is based on this GitHub Project

In this...

 

Part #1: Get Started
Part #2: Configure Settings
Part #3: How Does the Project Work?
Part #4: Server Handlers
Part #5: Using Code Snippets
Part #6: Add a New Field

Part #1: Get Started...

 

Not a tutorial from me, but I thought I'd share this link which has some nice buttons styled in CSS.

http://fxexperience.com/2011/12/styling-fx-buttons-with-css/

Create the css file and...

 

Using B4XCanvas and DrawCircle, and geometry laws, we can test whether two given circles intersect or not.
If they intersect the points of intersections are returned.

Circle Equations​

...

 

This post is partly in response to

[SOLVED] Application capable of measuring angles and distances.

I need to develop an application capable of measuring angles and distances. It can be for B4J or B4A. I prefer B4J. I have attached some image that shows more or less what I need initially. As the red dot is moved the measurements changes together. The crane arm is aticulated, and follows the...

www.b4x.com

The attached project is a very short...

 

Hi Fam

In this video, we learn about the grid, and how we can add rows and columns and set them to different sizes in order to place components when designing our UI.

In the abstract designer...

 

It is based on this Github Project and used it as inline Java code. Have modified the original Java code a bit to allow for scrambling of the cube from within B4J and then to solve it...

 

We recently had a particular problem with a BANano Webapp running on a phone from a client which we could not reproduce on any of our devices. It was impossible for us to have this device in our...

 

I'm writing the last changes on v1.08. Still have to do some cleanup and updating the demo, but the release is near...

I got a couple of requests for the Navigation Bar since the first...