B4J Tutorials

Is there a way to catch this error “java.lang.OutOfMemoryError: Java heap space”?

When the error happens it just seems to close the app.. I don’t want the app to close just display the error to...

 

Ola

NB: First set up BANanoVueMaterial The code for this tutorial is under the folder 4. Examples\6. Form Utilities


This tutorial will take you through the process...

 

FontAwesome and Material Icons are two free icon sets including more than 1500 icons.
They are implemented as regular font files which means that each icon is a regular character...

 

https://www.b4x.com/android/forum/threads/b4x-b4x-programming-technics-track-changes-tool.112452/

 

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...

 

Hello

There has been a few tutorial & posts about this already, but most of them are outdated or buried somewhere. I found an updated tutorial which explains very well the steps for installing...

 

This procedure starts from a freshly installed AWS EC2 Linux instance and installs a B4J server, named B4J.jar, configured as a daemon.
This tutorial assumes a basic knowledge of a Linux...

 

Sharing my first experience on how to develop a B4J UI application using the B4J-Bridge, in a window on Ubuntu 18.04.3 LTS (Codename bionic) running on an ACER Aspire.
My aim is to develop...

 

Ola

NB: Update browser settings to view PDF internally!!!

Test Drive

We started with BANanoPDFMake, which was a coding based approach to creating PDF Documents. To be able to...

 

Ola

The newest version of BANano comes with a lot of enhancements and some very interesting stuff. There's so much to learn.

So I decided to check one interesting thing out, Getting / Executing...

 

In this tutorial, I want to show you, how you can upload your Java Application to the Mac AppStore.
Here you can find a test Application in the Store.

Requirements:

• MacOS...

 

Ola

Simply put, this google map allows one to display a google map on their apps. One is able to also add markers that properties can be set up for.

One needs to get their own...

 

Ola

I recently had an issue. My app was working perfectly on the desktop and any other device except the mobile devices.

Using google chrome i found this extension named Inspect Devices...

 

Ola

The world has changing at a very lightning-fast speed. Gone are the days when websites were static. Ajax came for dynamic websites and soon React, Angular, Vue, the list is long.

A couple of...

 

Before you start: You need some experience with php, Apache Servers, OkHttpUtils, Lists, Maps and JSON structures.

This is an updated example of how to

- communicate with a apache server via...

 

We had an elections yesterday and I saw a nice widget which can serve as a small example.

There are several parties each one with a...

 

Ola

I have about 125 questions and each question has 1 possible answer from 4 responses.

Let me depict everything like this...

1. Responses ( a user should only select one using a radio box)...

 

I couldn't find this on the forum but if you are looking to package your server (non-UI) app with Java 11 (OpenJDK) then you should be aware there is no JRE per se.

I came across an article (link...

 

Follow these steps to associate files, based on their extension, with your app. The user will be able to double click on a file and your app will be opened with the selected file.

Step 1: Make...

 

I was trying to get to grips with setting the column width in my Excel table. According to the help I tried:

number of characters x 256, but all my columns dissappeared!

Setting a...