B4J Tutorials

B4J Primes Benchmark

• By Erel
• Jul 28, 2021

I found this benchmark that tests the same algorithm in multiple programming languages and decided to test it in B4J.

I've implemented the two algorithms.

B4X:

Sub Process_Globals

End Sub...

 

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[example] [B4X] Control the desktop with your phone

• By Erel
• Nov 30, 2015

This example shows how simple it is to create network solutions with B4J, B4A and B4i.

In this case the network communication is based on UDP.

It implements a remote desktop mouse, where the...

 

Attachments

• RemoteDesktopControl_B4J.zip

  2.6 KB · Views: 2,489
• RemoteDesktopControl_B4A.zip

  9.3 KB · Views: 2,437
• RemoteDesktopControl_B4i.zip

  4.1 KB · Views: 1,661

Last edited: Dec 2, 2015

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[BANano] why you might need parseBool

• By Mashiane
• Jun 26, 2021

Ola

I use a lot of parseInt and parseFloat when I code because even when I define the variables as Int, Double, Float etc, somewhere somehow mistakes happen, you find your app not working and...

 

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[Tool] Integrated B4JPackager11 helper: PrepInstallerScript (with source code)

• By walt61
• Jul 22, 2021

I was making the switch from Java 8 to Java 11 and wanted to use the 'Integrated B4JPackager11' as explained by @Erel in...

 

Attachments

• PrepInstallerScript.zip

  5.5 KB · Views: 589

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How to run .jar files on MacOs + VM to test (and other MacOs things)

• By jmon
• Jul 20, 2021

Hi,

I had to make my application (PostChat) available on MacOs. I had no problems porting the app to Linux, but I found the port to MacOs very annoying, and had lots of issues. So I'm posting...

 

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[BANano] Using an external Editor like WYSIWYG Web Builder with B4J/BANano

• By alwaysbusy
• Mar 23, 2020

WYSIWYG Web Builder (https://www.wysiwygwebbuilder.com/) is a cheap Website builder that makes it very easy to make your design. @Alejandro Moyano mentioned it in his post on his...

 

Attachments

• WYSIWYGWebBuilder.zip

  177.1 KB · Views: 972

Last edited: Mar 23, 2020

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[jPOI] Migration to version 5 Mac

• By MarcoRome
• Jul 5, 2021

For Mac
as already suggested by the good @KMatle

I needed to remove the Packager property (The B4J-packager does it on it's own with the new version)

Note 1*

B4X:

'#PackagerProperty...

 

Last edited: Jul 7, 2021

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Tag management for UI Nodes

• By Heuristx
• Jun 30, 2021

In B4XPages we rely heavily on tags to identify UI elements. Yet tags are valuable for connecting data to the UI, too, and it is easy to feel we are wasting tags for identification.
There is a...

 

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[BANano] Why it is important to use unique names for your elements when not using AutoID?

• By Mashiane
• Jun 29, 2021

Ola

I just spent some time nearly sweating as to why my app was not working properly. Turns out that my element names are not unique and as such a conflict arose.



Background...

 

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[BANano] Creating PDF Documents with jsPDF using BANanoJsPDFAD

• By Mashiane
• Jun 17, 2021

Ola

As you are aware, the BANanoJsPDFAD tool is out. Its developed using jsPDF and it uses the abstract designer for you to create pdf Documents.

You can insert text, triangles, images...

 

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[XLUtils] Word document with 200 charts

• By Erel
• Jun 21, 2021

This example visualizes the data from: https://ourworldindata.org/coronavirus-source-data
As the CSV data is quite large, a...

 

Attachments

• 1.zip

  79.4 KB · Views: 581

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[XLUtils] Word - bookmarks, urls and page breaks

• By Erel
• Jun 21, 2021

XLUtils v2.02 adds support for urls, bookmarks and page breaks.

A paragraph tag with the PageBreak attribute will start on a new page.

B4X:

$"[p PageBreak=True]This will appear...

 

Attachments

• WordExample.zip

  16.5 KB · Views: 576

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[B4X] Proxy Server Socks 4 and Proxy Http (Source Code)

• By Star-Dust
• Jun 14, 2021

Many years ago I needed to sniff a connection and I didn't have a free sniffer available and I didn't know how to create one .... So after a long reflection I decided to create a Proxy Server in...

 

Attachments

• Sock4.zip

  5.6 KB · Views: 573

Last edited: Jun 16, 2021

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[jPOI] Migration to version 5 experience (not a big thing)

• By KMatle
• Jun 13, 2021

Just a short note how my experience was migrating to JPOI5. Not worth a tutorial - more a "all easy note" when you migrate an important app (like mine which is used by a company).

I needed to...

 

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javafx charts / graphs - LineChart, PieChart, BarChart, AreaChart, Horizontal BarChart, Stacked BarChart, Stacked AreaChart

• By Johan Schoeman
• Apr 18, 2021

This is an "inline java code" example for the javafx line chart. It has very basic functionality at present.

You will need javafx.controls.jar. I found the jar on my computer at...

 

Attachments

• LineChart.zip

  4.4 KB · Views: 644

Last edited: May 3, 2021

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[XLUtils] Hyperlinks and Outlining / Grouping

• By Erel
• May 4, 2021

XLUtils v1.03 adds support for grouping rows and columns and for adding links.



Grouping is done with XLSheetWriter.GroupRows / Columns.
By default the expand button is positioned at...

 

Attachments

• CovidDataOutlining.zip

  9.9 KB · Views: 544

Last edited: May 5, 2021

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jServer & SQLite [Multiple Request Stress Test]

• By tchart
• May 10, 2021

Should I use SQLite as my web server database?

This has come up before and last week it came up again in the "Chit Chat" forum. The question has already been answered here before and there...

 

Attachments

• StressSQLite.zip

  5.9 KB · Views: 755

Last edited: Mar 20, 2022

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[B4J] - Lottery for Telegram (Source)

• By alirezahassan
• May 31, 2021

Hi all,
Used to make a lottery in Telegram.
You can expand the UI of this app and use it like TV lotteries.
for example: (Be sure to watch the clip)

this zip file has a...

 

Attachments

• Lottery-V1.zip

  3.9 KB · Views: 641

Last edited: May 31, 2021

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[BANanoVuetifyAD] vuetify.GetElementByID

• By micro
• May 30, 2021

Hi to all
it's probably not the right way, so I'm asking you where I'm wrong
This Sub is in pgIndex (about is another code module)

B4X:

Sub btnlogOff_click(e As BANanoEvent)
    If about.login =...

 

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[WebApp] Web Apps Overview

• By Erel
• Apr 10, 2014

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

 

Attachments

• ServerExample.zip

  75.1 KB · Views: 2,014
• ServerExampleNoMySQL.zip

  71.8 KB · Views: 2,080

Last edited: May 30, 2021

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