B4J Tutorials

What is B4J?

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[WebApp] Custom Elements - DatePicker & Dialogs

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...
 

Attachments

  • DatePicker.zip
    3.6 KB · Views: 1,327
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GuessMyNumber - Very simple example



The computer chooses a number and you need to find the correct number.
B4X: 
Sub Process_Globals
   Private fx As JFX...
 

Attachments

  • GuessMyNumber.zip
    1.3 KB · Views: 1,000
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String to variable - Iterate variable names

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...
 
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B4J Change Log (version history)

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Working with JavaFX Scene Builder

This is an old and irrelevant tutorial.
 
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Parsing huge text files

The JVM (Java Virtual Machine) performance is quite amazing.

This means that we can use B4J to build apps that handle huge files.
I downloaded a 3.7GB log file from this server. Each line...
 
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Modules Attributes

The following module attributes are supported:

Main Module
  • MainFormWidth / MainFormHeight - Set the main form initial width and height.
  • AdditionalJar - An...
 
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Magnifying glass example



A Canvas node is used to magnify a small window under the mouse cursor.

The main code is:
B4X: 
Sub iv_MouseMoved...
 

Attachments

  • MagnifyingGlass.zip
    99.5 KB · Views: 974
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RDC client

Attachments

  • RDC-Client.zip
    3.4 KB · Views: 1,535
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Moving Smiley Example



This example uses a Canvas node together with a Timer to draw a moving smiley.

The Canvas node is a special node the you...
 

Attachments

  • Smiley.zip
    3.7 KB · Views: 1,629
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