B4J Tutorials

Ola

Seeking.Shelter is an app for people in distress. It helps one find the police stations, courts, shelters, clinics and hospitals around South Africa.

One of the WebApp reviewers made a...

 

You can put more than one java application in a single jar, but still be able to run them as individual applications.
The main advantage is the space it takes up.
For example, a simple non-ui...

 

Ola

Was recently requested to look at this by a friend, for encryption

1. Download this repo here to get the md5 javascript resource

https://github.com/blueimp/JavaScript-MD5

2. In your...

 

Ola

As you might be aware, one has been busy working on Database.Show, a BANano+Vuetify Database Viewer, Documentor, CRUD thingy.

We have just closed off one of the milestones, MySQL and...

 

hi,

After few adjustments B4J works fine on Ubuntu.
See picture;-)

If you want, I'll write a tutorial in french.
Looking for a translator .... If someone want it!

see you soon.

 

This document is intended to add a little understanding as to how Resumable Subs actually work under the bonnet and is intended as a complement to how they are used as Erel explains in his...

 

Hi, today I have lost some time testing a B4j server app in a VPS, my app was supposed to help upload big files to the server. Locally, everything was working as expected, but when I have...

 

To help with my own learning I have played with JavaObject and JavaFX to create linecharts.

Here are the 3 examples I have made I have ported the code directly from the Oracle...

 

Hi,
Have just finished making a Color Picker app for Windows & Mac (B4J v8.90 & jdk-11.0.1).
Thought someone might find this useful (specially newbies).

(Just my...

 

Spoiler: Some notes about the tutorials

From time to time, jOpenCV examples will be referenced in this tutorial. You can find the donwload link in the first post of the jOpenCV library thread
Syntax: when referencing...

 

Spoiler: Some notes about the tutorials

From time to time, jOpenCV examples will be referenced in this tutorial. You can find the donwload link in the first post of the jOpenCV library thread
Syntax: when referencing...

 

Attached project code:

#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form...

 

Hello to you all,
I decided to recreate this simple but effective game example, the game is based on the B4XPages library. The game is designed for hand, eye and memory coordination, so I called...

 

Hello to you all,
Here is an extremely simple example on how to easily recreate Google Trends results using B4XPages with B4j and the xChart library. In this example I used Google...

 

Ola

So me runs into this nice charting library, morris chart. Me see a nice donut. Me likes donut.

Their examples are quite nice and straight forward and easy to implement...

 

OkHttpUtils2 methods are designed to be called on the main thread. This is the case in all platforms and configurations, except of B4J server solutions.

Starting from jOkHttpUtils2 v2.95 it is...

 

I thought I would share how I requested and installed a SSL certificate for my B4J server.

In my case I used namecheap.com to purchase a $9 SSL certificate. I already had a domain name and a...

 

Hello to you all,
Here is a simple example on retrieving data from a REST API requested using the JSON Generator (you could also use http URL download), the same JSON library is also used to parse...

 

Hello All
Here we have an simple example on how you use your desktop OS (in this example Windows) and public internet IP address in conjunction with OpenWeather API, this is just a simple example...

 

Hi Alain,

When "creating" custom libraries in B4X one can introduce a few properties, like Author, Version etc....
I tried using those properties, but it has no effect in the lib, I'm guessing...