B4J Tutorials

The web app framework can be easily extended with new elements and new features.

In this example we use two elements from jQuery UI library...

 

This example is a simple Task Manager using HTML to access the server by the Client.
The tasks are stored in a SQLite database, which is managed by the B4J WebServer.
Read...

 

B4J v2.00 adds support for web applications based on WebSocket technology. With WebSocket The browser and the server...

 

In this tutorial we will develop the following web app:

There are three components to this solution:

Main module...

 

Online example: http://basic4ppc.com:51042/regex/index.html

This tool allows you to test regular expressions...

 

Online example: http://basic4ppc.com:51042/reports/google_charts.html

Google Charts is a free web...

 

Online example: http://basic4ppc.com:51042/reports/index.html

In this example we are using a JQuery open...

 

This example is a port of the following desktop example: http://www.b4x.com/android/forum/threads/jsontree-tool-to-help-with-json-parsing-b4a-b4j.35963/...

 

Try it online: https://www.b4x.com:51042/login_example/
Note that it is not connected to the forum database. Feel free to test it and register new users. Its only purpose...

 

Starting from B4J v1.80 you can configure custom error pages. This means that instead of the default error page:

You can...

 

B4J v1.80 adds support for remote debugging using B4J-Bridge, a tool similar to the beloved B4A-Bridge.

The purpose of B4J-Bridge is to allow you to connect the IDE to a remote machine such...

 

Here's a really simple demonstration of connecting an Arduino Uno to an app written in B4J.

You will need to modify the code around line 25 to reflect the correct COM Port that your Arduino is...

 

This is a simple idea to replace the function "eval" or "execute" that other programming languages have. The purpose is to retrieve a variable from a string:

How to iterate variable...

 

B4J server library is based on an open source project named Jetty.
Jetty server performance is excellent which means that B4J server performance is also excellent.

The following numbers are the...

 

The purpose of this example is to demonstrate how you can interact with the server through ajax requests.

The server...

 

v10.0 - October 16, 2023 - https://www.b4x.com/android/forum/threads/b4j-v10-0-is-available-for-download.155241/

• Code snippets...

 

In a previous example we shown you how you can use B4J to create a desktop application that connects to a number of devices and shows the camera frames: B4J CCTV example

In this example we...

 

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 is a simple server that takes a screenshot of the current desktop screen and returns the image as the response.

For example if you call it from the device browser:

The handler...

 

This is an example of building a data collection solution. The solution is made of three components:
- (B4J) Server - Manages the data in a SQLite database.
- (B4A) Device client and (B4J) desktop...