Tag Index

Java

Completeness with semantically strong types as a design principle

Completeness as a design principle enables a domain model where a wide range of interactions emerge naturally, without needing to be externalized.

REFCODES.ORG change list version 3.3.9

The REFCODES artifacts version 3.3.9 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.8

The REFCODES artifacts version 3.3.8 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.7

The REFCODES artifacts version 3.3.7 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.6

The REFCODES artifacts version 3.3.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.5

The REFCODES artifacts version 3.3.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.4

The REFCODES artifacts version 3.3.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.3

The REFCODES artifacts version 3.3.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.2

The REFCODES artifacts version 3.3.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.3.1

The REFCODES artifacts version 3.3.1 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.8

The REFCODES artifacts version 3.2.8 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.7

The REFCODES artifacts version 3.2.7 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.6

The REFCODES artifacts version 3.2.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.5

The REFCODES artifacts version 3.2.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.4

The REFCODES artifacts version 3.2.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.3

The REFCODES artifacts version 3.2.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.2.2

The REFCODES artifacts version 3.2.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.1.3

The REFCODES artifacts version 3.1.3 have been deployed to Maven Central, see the change list for the updates …

refcodes-decoupling: Breaking up dependencies between components

Tiny dependency injection and inversion of control toolkit to assemble applications whilst developing and testing components independently …

REFCODES.ORG change list version 3.1.2

The REFCODES artifacts version 3.1.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.1.1

The REFCODES artifacts version 3.1.1 have been deployed to Maven Central, see the change list for the updates …

LEDIANO, Bespielen eines Piano-LED-Streifens

LEDIANO ist eine Software, die über einen Raspberry Pi eine LED-Leiste steuert, um die Koordination von Motorik und Gehör zu fördern, indem die zu spielenden Klaviertasten durch das Aufleuchten der entsprechenden LEDs angezeigt werden.

REFCODES.ORG change list version 3.1.0

The REFCODES artifacts version 3.1.0 have been deployed to Maven Central, see the change list for the updates …

Java Software Developer and IoT Programmer: Your Coding Architect

Before I forget to mention (though quite a few people seem already to know), I may help you with your software projects …

Write once, run anywhere: An Android game using JavaFX and the GraalVM

Get it into the Play Store! Writing an Android game with Java >= 16 and JavaFX (which also runs on GNU Linux and MS Windows using a single code base) …

REFCODES.ORG change list version 3.0.9

The REFCODES artifacts version 3.0.9 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.0.8

The REFCODES artifacts version 3.0.8 have been deployed to Maven Central, see the change list for the updates …

refcodes-io: Paving the road for complex and low level I/O across boundaries

The I/O artifact defines basic types handling communication between processes (across system boundaries), to be harnessed by complex and low level I/O …

GraalVM: Native command line tools for Linux and Windows written in Java

Thanks to the GraalVM, you may compile your Java command line tools to native executables, directly running on MS Windows or GNU Linux without any JVM being installed or bundled …

REFCODES.ORG change list version 3.0.7

The REFCODES artifacts version 3.0.7 have been deployed to Maven Central, see the change list for the updates …

Java deliverables as executable bundle and the launcher trick

In the past I coded some command line tools in Java which are quite useful for me and which I ought to be useful for others. Providing just fat JAR files implies launching of those Java applications to be more or less cumbersome …

FLATML manpage

A shell filter flattening markup properties of XML, JSON, YAML, INI or PROPERTIES format to key/value lines …

REFCODES.ORG change list version 3.0.6

The REFCODES artifacts version 3.0.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.0.5

The REFCODES artifacts version 3.0.5 have been deployed to Maven Central, see the change list for the updates …

Buchtipp: Spring for GraphQL

Reckoning the book »Spring for GraphQL« from Michael Schäfer very helpful, the Javamagazin 8/22 published an according book review I wrote …

PASSGEN manpage

A tool for generating password lists written into a file or printed to <STDOUT> by providing rule expressions …

REFCODES.ORG change list version 3.0.4

The REFCODES artifacts version 3.0.4 have been deployed to Maven Central, see the change list for the updates …

refcodes-criteria: Criteria construction for selecting, filtering or identifying

Create query statements which can be applied to data sinks from criteria objects and parse (construct) criteria objects from queries …

REFCODES.ORG change list version 3.0.3

The REFCODES artifacts version 3.0.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.0.2

The REFCODES artifacts version 3.0.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 3.0.1

The REFCODES artifacts version 3.0.1 have been deployed to Maven Central, see the change list for the updates …

refcodes-generator: Mass produce password permutations and distinct IDs

Use a rule based word permutations generator for recovering lost data or a fast ID generator for mass production of adjustable uniqueness …

refcodes-archetype: Using the REFCODES.ORG toolkit made easy

Use the REFCODES.ORG archetypes at Maven Central to easily create REFCODES.ORG driven applications …

REFCODES.ORG change list version 3.0.0

The REFCODES artifacts version 3.0.0 have been deployed to Maven Central, see the change list for the updates …

refcodes-matcher: Build custom matching logic and match path patterns

Match your objects by building hierarchical matching structures with the help of some syntactical sugar (if you like) …

refcodes-serial: A serial communication toolkit for Java

Code serial communication at a high abstraction, addressing issues such CRC, endianess, acknowledgement or handshaking whilst keeping you full control over your bits and bytes …

JUG Munich - Automatically answer Teams chats with Java microservices

In January 2022 we were offered the opportunity to talk about automatically answering MS-Teams chats with Java microservices at the JUG (Java User Group) Munich (»Teams-Chats mit Java-Microservices automatisch beantworten«) …

REFCODES.ORG change list version 2.2.2

The REFCODES artifacts version 2.2.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.2.1

The REFCODES artifacts version 2.2.1 have been deployed to Maven Central, see the change list for the updates …

PLAYLOAD manpage

Peer-to-Peer command line transport system for exchanging messages between peers over serial TTY (COM) ports …

IT-Tage 2021 - No WLAN, no LAN: Wiring IoT installations

In December ‘21, I was happy to have a slot as a speaker at the IT-Tage 2021, presenting my topic »No WLAN, no LAN: wiring IoT installations« …

REFCODES.ORG change list version 2.2.0

The REFCODES artifacts version 2.2.0 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.1.6

The REFCODES artifacts version 2.1.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.1.5

The REFCODES artifacts version 2.1.5 have been deployed to Maven Central, see the change list for the updates …

CRACKZIP manpage

Recovery tool for cracking password protected ZIP (*.zip) files …

REFCODES.ORG change list version 2.1.4

The REFCODES artifacts version 2.1.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.1.3

The REFCODES artifacts version 2.1.3 have been deployed to Maven Central, see the change list for the updates …

ASCART manpage

A command line tool for creating ASCII art (“[ASC]II[ART]”) from plain text or image files …

BIN2TXT manpage

Encoding and decoding tool for BASE64 and related encodings/decodings from/to ASCII to/from binary …

Chaos-based encryption - revisited!

How to use the CHAOS command line tool to evaluate Chaos-based encryption alongside a comparison to the AES algorithm.

TELETYPE manpage

Teleprinter command line tool for sending data to and receiving data from TTY (serial) ports simultaneously.

HTTPECHO manpage

Small HTTP-Echo server echoing incoming HTTP-Requests back to the client and to the console …

AUTOCHAT manpage

ELIZA chatbot (by Joseph Weizenbaum) talking to you via RESTful services and an MS-Teams endpoint or on the console …

WATCHDOG manpage

Cellular automaton simulating a watchdog in a house using JavaFX …

PIXGRID manpage

Tool for displaying a light bulb matrix rendering configurable scrolling and fading pixmaps (PNG, GIF or JPG) …

TTY2MQTT manpage

Tool bridging between a serial port and an MQTT message broker for publishing or subscribing messages …

WAVES manpage

Tool to generate or pipe and filter (sound) waves for audio playback and export.

DADUM manpage

Tool for dumping mass data by pattern to files or streams …

PICDAT manpage

Tool for converting (raw) data to a pixmap image and extracting raw (pixmap) data from an image …

CHAOS manpage

Encryption and decryption tool of file or stream data using Chaos-based encryption …

Manpages online!

The manpages for the FUNCODES.CLUB commands are online now!

REFCODES.ORG change list version 2.1.2

The REFCODES artifacts version 2.1.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.1.1

The REFCODES artifacts version 2.1.1 have been deployed to Maven Central, see the change list for the updates …

Using TTY2MQTT to bridge between serial communication and MQTT

The TTY2MQTT command line tool is a bridge between TTY (COM) serial communication and an MQTT message broker easily harnessing your IoT devices into the Cloud.

REFCODES.ORG change list version 2.1.0

The REFCODES artifacts version 2.1.0 have been deployed to Maven Central, see the change list for the updates …

Scrolling and fading video conferencing with PixGRID

The year 2020 was the year of video conferencing and remote meetings (“corona”) … how can you ease the situation of your colleagues when the meetings are getting boring?

refcodes-tabular: Process tabular data and CSV files using POJOs

Use the REFCODES.ORG archetypes at Maven Central to easily create REFCODES.ORG driven applications …

Experimenting with sinusoids and overlaying waves

A small Java tool teams up with your shell’s pipes and filters to provide a curve functions experimentation box

REFCODES.ORG change list version 2.0.5

The REFCODES artifacts version 2.0.5 have been deployed to Maven Central, see the change list for the updates …

refcodes-audio: Handle WAV files and line-out with just some I/O streams

Use I/O streams to generate and play your sound waves on your PC’s speaker or write them to a WAV file …

Java Profiler sponsored by JProfiler

As of today, REFCODES.ORG’s open source software is profiled with JProfiler thanks to ej-technologies’s OSS support initiative.

REFCODES.ORG change list version 2.0.4

The REFCODES artifacts version 2.0.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.0.3

The REFCODES artifacts version 2.0.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 2.0.2

The REFCODES artifacts version 2.0.2 have been deployed to Maven Central, see the change list for the updates …

Coding Serbia 2019 - With swarm intelligence on Burglar Hunt

In May ‘19, I was happy to speak at the Coding Serbia 2019, presenting my topic »With swarm intelligence on Burglar Hunt« …

REFCODES.ORG change list version 2.0.1

The REFCODES artifacts version 2.0.1 have been deployed to Maven Central (now harnessing Maven Archetypes), see the change list for the updates …

REFCODES.ORG change list version 2.0.0

The REFCODES artifacts version 2.0.0 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.10.3

The REFCODES artifacts version 1.10.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.10.2

The REFCODES artifacts version 1.10.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.10.1

Xmas updates and new features! The REFCODES artifacts version 1.10.1 have been deployed to Maven Central, see the change list for the updates … “- Merry Christmas!

Fun with cellular automatons, BoulderDash and the Watchdog!

The WATCHDOG artifact is some demo application featuring show-cases on cellular automatons being built with the REFCODES.ORG artifacts.

REFCODES.ORG change list version 1.10.0

The REFCODES artifacts version 1.10.0 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.9.9

The REFCODES artifacts version 1.9.9 have been deployed to Maven Central, see the change list for the updates …

JVM-Con 2018 - With swarm intelligence on Burglar Hunt

In November ‘18, I was happy to have a slot as a speaker at the JVM-Con 2018, presenting my topic »With swarm intelligence on Burglar Hunt« …

IT-Tage 2018 - Experiences of an Enterprise Developer with IoT

In December ‘18, I was happy to have a slot as a speaker at the IT-Tage 2018, presenting my topic »Experiences of an Enterprise Developer with IoT« …

REFCODES.ORG change list version 1.3.5

The REFCODES artifacts version 1.3.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.3.4

The REFCODES artifacts version 1.3.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.3.3

The REFCODES artifacts version 1.3.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.3.2

The REFCODES artifacts version 1.3.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.3.1

The REFCODES artifacts version 1.3.1 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.3.0

The REFCODES artifacts version 1.3.0 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.9

The REFCODES artifacts version 1.2.9 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.8

The REFCODES artifacts version 1.2.8 have been deployed to Maven Central, see the change list for the updates …

Restful JShell … RestREPL your Java 9’s JShell!

Java 9’s JShell can not only be used as a command line tool, furthermore you can use it in your own Java application. Learn on how to harness the JShell by building a restful service around it.

REFCODES.ORG change list version 1.2.7

The REFCODES artifacts version 1.2.7 have been deployed to Maven Central, see the change list for the updates …

All-in-one Java configuration properties at hand

Learn on how to use the all-in-one runtime configuration properties giving you all the power of the various configuration features with a single line of code …

Automatically obfuscate your Java application’s configuration

Secure your application’s sensitive properties (passwords, secrets or access keys) on your hosts, on a host-, user- and/or application-individual context, and learn on how to use the all-in-one runtime configuration properties …

REFCODES.ORG change list version 1.2.6

The REFCODES artifacts version 1.2.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.5

The REFCODES artifacts version 1.2.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.4

The REFCODES artifacts version 1.2.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.3

The REFCODES artifacts version 1.2.3 have been deployed to Maven Central, see the change list for the updates …

Are frameworks in software development without alternative?

Last year I was speaking about Java Frameworks at the JVM-Con 2017 in Cologne and recently, as a follow up, I put all which I was speaking about into an article …

REFCODES.ORG change list version 1.2.2

The REFCODES artifacts version 1.2.2 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.2.1

The REFCODES artifacts version 1.2.1 have been deployed to Maven Central, see the change list for the updates …

refcodes-properties: Managing your application’s configuration

Compose the way you need to retrieve (and store) your application’s properties

REFCODES.ORG change list version 1.2.0

The REFCODES artifacts version 1.2.0 have been deployed to Maven Central, see the change list for the updates …

The canonical model, an ace upon your sleeve

Learn how the canonical model pattern helps you harness a bag full of functioanlity whilst keeping your effort low (and making the bits and pieces fit together magically) …

Dead simple Java application configuration

Retrieve (and store!) your YAML, TOML, JSON, XML or whatever (profiled) properties from various locations, resources or folders, just as you need it!

JVM-Con 2017 in Cologne

This year I have been at the JVM-Con 2017 in Cologne as a speaker, the topic being »About sense and nonsense on extensive framework use« …

REFCODES.ORG change list version 1.1.9

The REFCODES artifacts version 1.1.9 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.8

The REFCODES artifacts version 1.1.8 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.7

The REFCODES artifacts version 1.1.7 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.6

The REFCODES artifacts version 1.1.6 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.5

The REFCODES artifacts version 1.1.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.4

The REFCODES artifacts version 1.1.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.3

The REFCODES artifacts version 1.1.3 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.2

The REFCODES artifacts version 1.1.2 have been deployed to Maven Central, see the change list for the updates …

Bare-Metal REST with just a few lines of code

On building slim RESTful services and REST clients without a Heavy-Weight framework doing magic in the background and with a little help from Java 8’s lambda expressions.

refcodes-rest: RESTful services using lambdas

Build a RESTful lightweight service with just a few lines of code in three steps using lambda expressions.

REFCODES.ORG change list version 1.1.1

The REFCODES artifacts version 1.1.1 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.1.0

The REFCODES artifacts version 1.1.0 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.0.5

The REFCODES artifacts version 1.0.5 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.0.4

The REFCODES artifacts version 1.0.4 have been deployed to Maven Central, see the change list for the updates …

REFCODES.ORG change list version 1.0.3

The REFCODES artifacts version 1.0.3 have been deployed to Maven Central, see the change list for the updates …

Good bye utility classes, here come builders (2/2)

Part 2 on builders being a real alternative to utility classes, this time on doing ASCII art with a builder versus a utility class …

Good bye utility classes, here come builders (1/2)

This first part of a two parts series on builders is on using the builder pattern for creating formatted text tables to your console…

REFCODES.ORG change list version 1.0.2

The REFCODES artifacts version 1.0.2 have been deployed to Maven Central, see the change list for the updates …

Base! How low can you go? Base64, Base32, Base16, …

Just for fun I implemented a Base64 codec while replacing some utility classes (and third party dependencies) with builders …

REFCODES.ORG change list version 1.0.1

The REFCODES artifacts version 1.0.1 have been deployed to Maven Central, see the change list for the updates …

JavaFX checkerboard for fun and cellular automaton experiments

Doing some thinking on BoulderDash being a cellular automaton and programming a petri dish for board games …

REFCODES.ORG change list version 1.0.0

The REFCODES artifacts version 1.0.0 have been deployed to Maven Central, see the change list for the updates …

Lambda up your jobs asynchronously!

Java 8’s lambda support has been added to the refcodes-jobbus as of version 1.0.0-SNAPSHOT …

Java 8: Obliged to do the Optional … or is it optional?

There seems to be some uncertainty on how to use the Optional class provided by Java 8 - I disect an example to get closer to an answer …

Get your jobs executed asynchronously - anywhere!

Lately, asynchronous (distributed) execution of jobs experiences some revival, be it as of technical constraints or as of leveraging big data processing …

refcodes-jobbus: Asynchronous job execution

Push your jobs onto the job-bus, let the job-bus execute your jobs asynchronously and grab the results later on - don’t bother with where (local or remote) your jobs are being executed …

Publish … subscribe … observe … event-bus?

Lately some colleagues and me were reasoning on how to do client-side communication between web-page components … with Java I recommend taking a look at the refcodes-eventbus …

refcodes-eventbus: Observer + Publish/Subscribe = Message broker

Decoupling and channeling your asynchronous publish/subscribe message broker communication with the refcodes-eventbus …

refcodes-security: Chaos-based encryption as JCE (and without)

Chaos-based encryption is easy to implement and easy to be attached to the Java Cryptographic Extension (JCE) …

refcodes-remoting: Face-to-face lightweight remote method calls

Publish your Java object on your server; connect to it on your client; use it on your client as if you were using it on the server … curious?

Logging like the nerds log

An introduction to the refcodes-logger framework; let’s start with giving your logs some color and tidy them up! Then let’s take over spring-boot’s log output …

refcodes-logger: Fancy runtime-logs and highly scalable cloud logging

How to log any kinds of structured data - including your runtime logs - into the cloud (NoSQL clusters) or your local fancy colorful and tidy formatted console …

refcodes-forwardsecrecy: High encryption throughput

Encrypt with the security of asymmetric- and the throughput of symmetric encryption (in the cloud) …

Having fun with the command pattern

Doing an undo in your apps and how you prepare your methods to be called later …

refcodes-command: Do the undo

Ever wondered how to easily implement and extend your application’s undo functionality?

refcodes-cli: Parse your args[]

Just about everything you’ll need to comfortably parse your Java command line arguments …

Hello REFCODES.ORG!

My blog to accompany my org.refcodes Java based Maven artifacts

Coding Serbia 2014 in Novi Sad - Big data processing the lean way

Talking about »Big data processing the lean way - a case study« at the Coding Serbia 2014 conference in Novi Sad …

Verschlüsselung im Chaos (Chaos-based encryption)

This text I received in the late 1980s in Harare (Zimbabwe ) from the mathematician Sönke Rehder; back then as a pupil I coded the herein described algorithm in BASIC on an Atari 600XL …