Carl Dea on foojay.io - Friends of OpenJDK

Project Panama for Newbies (Part 2)

Fri, 02 Jan 2026 01:21:00 +0000

Updated December 29, 2025 (originally published August 17, 2021, republished January 2, 2026): This article now features Java 25 and the Foreign Function & Memory (FFM) API, which has been a standard feature since JDK 22 (JEP-454 ).

Introduction

Welcome back to Part 2 of Project Panama for Newbies! If you are new to this series, check out Part 1 first.

If you remember from Part 1, we learned how to create C language strings, primitive data types and arrays. We also got a chance to iterate through the data outside of the Java heap and later display items via C’s printf() and Java’s printf() method from the IO.printf().

Project Panama for Newbies (Part 1)

Thu, 01 Jan 2026 09:11:00 +0000

Updated December 28, 2025 (originally published August 10, 2021, republished January 1, 2026): This article now features Java 25 and the Foreign Function & Memory (FFM) API, which has been a standard feature since JDK 22.

In this series of articles, we will explore the APIs from OpenJDK’s Project Panama . My intent is to show you how to be proficient in using the Foreign Function and Memory Access APIs as it relates to Java interoperability with native code. After FFI (foreign function interface) & FFM (foreign function memory) have been finalized in JDK 22 the APIs currently reside in the following package namespaces.

Building Project Panama's jextract tool by yourself

Thu, 09 Jun 2022 14:22:47 +0000

Absorb what is useful, discard what is useless and add what is specifically your own. – Bruce Lee

Do you want to build Project Panama’s Jextract tool by yourself? I can show you how!

If you’ve seen any of my past articles on Project Panama I’ve mentioned a really convenient tool called jextract that can generate Java binding code that represents native functions or variables (symbols) from C libraries.

This alleviates the developer’s need of creating binding code by hand. By passing in a C header file (.h extension) jextract can generate source code or compiled Java classes.

Java Panama Polyglot (Rust) Part 4

Thu, 26 May 2022 08:33:02 +0000

Hello and welcome to the final article of the Java Panama Polyglot series, where we are presenting quick tutorials or recipes on how to access native libraries written in other languages.

In this article you will be using Project Panama to talk to the Rust language.

If you are new to Java’s Foreign Function Access APIs (Project Panama ) check out Panama4Newbies .

In Part 3 you had a chance to learn about how to use Java Project Panama’s abilities to access the locally installed Python interpreter.

Java Panama Polyglot (Python/Tensorflow) Part 3

Tue, 26 Apr 2022 04:42:58 +0000

Hello and welcome back to the Java Panama Polyglot series where we are presenting quick tutorials or recipes on how to access native libraries written in other languages.

If you are new to Java’s Foreign Function Access APIs (Project Panama ) check out: Panama4Newbies

In Part 2 you got a chance to learn about how to use Java Project Panama’s (foreign function interface APIs) abilities to access native libraries written in Apple’s Swift language .

Java Panama Polyglot (Swift) Part 2

Wed, 13 Apr 2022 15:34:59 +0000

Hello and welcome back to the Java Panama Polyglot series where we will be presenting quick tutorials or recipes on how to access native libraries written in other languages.

In Part 1 you got a chance to learn about how to use Java Project Panama ’s (foreign function interface) abilities to access native libraries written in C++. Today, we will be looking at Java code being able to talk to Apple’s Swift language.

Java Panama Polyglot (C++) Part 1

Wed, 06 Apr 2022 15:41:49 +0000

Hello and welcome to the Java Panama Polyglot series where we will be presenting quick tutorials or recipes on how to access native libraries written in other languages.

For example, you will learn about Java Project Panama’s (foreign function interface) abilities to access native libraries written in C++, Swift, Python, and others.

What is Polyglot?

Have you heard of polyglot as it relates to developing full stack applications? If your answer is yes, then you probably know about the programming languages needed to build an enterprise web application.

Increasing Event Streaming with Kafka and Azul

Tue, 29 Mar 2022 13:41:48 +0000

Welcome to getting started with Azul Platform Prime and Apache Kafka !

In this article you will learn how to switch between two different Java runtime environments to run an Apache Kafka instance.

In later articles, this will allow you to compare runtime performance benchmarks.

Before we begin, let’s supply some context on Azul’s Platform offerings and Apache Kafka.

What is Azul Platform Prime and Platform Core?

Azul offers two Java runtime environments Platform Prime and Platform Core . Platform Prime (formerly known as Zing) is a high-performance implementation of the JVM (Java Virtual Machine) while Platform Core refers to Azul’s solution that includes the Zulu build of OpenJDK with dedicated support.

Project Panama for Newbies (Part 4)

Thu, 24 Feb 2022 08:34:52 +0000

Updated December 31, 2025: This article now features Java 25 and the Foreign Function & Memory (FFM) API, which has been a standard feature since JDK 22.

Welcome to Part 4 of Java’s Project Panama for newbies! If you’ve been following this series of posts on how to use Java’s Project Panama APIs you probably have noticed that all of the examples thus far demonstrate how Java code can execute C code by using the linker ’s downCall() method.

Lights, Camera, Action: GitHub Actions with Java (Part 3)

Thu, 03 Feb 2022 15:24:33 +0000

The Java GitHub Action that Rules them all - Disco API{#caption-attachment-51347}

When we ended Part 2 of this blog series Lights, Camera, Action: GitHub Actions with Java Part 2 , I talked about the near future of GitHub Actions. Well, today the future is now, so let’s get into this!

Welcome back to the series of articles on GitHub Actions with Java Part 3. If you didn’t catch Part 1 & 2 head over here: Part 1 & Part 2

Lights, Camera, Action: GitHub Actions with Java (Part 2)

Mon, 15 Nov 2021 14:35:43 +0000

Introduction

Have you ever been given too many choices resulting in the feeling of indifference (“not a big deal, doesn’t really matter either way”)? However, when given two choices, somehow you feel torn or become more critical of one versus the other.

In this short overview, you will learn how to create a GitHub Action workflow that allows you to choose a particular OpenJDK build distribution.

And welcome back to the series of articles on GitHub Actions with Java Part 2 . If you didn’t catch Part 1 head over here: https://foojay.io/today/github-actions-with-java-part-1 .

Lights, Camera, Action: GitHub Actions with Java (Part 1)

Thu, 28 Oct 2021 12:36:19 +0000

Have you ever heard of Jenkins , Travis , TeamCity or Bamboo ?

"Github smoothie" Acarlos1000

For those who do not know, these are build infrastructure software services that manage and schedule (notify) the building of software artifacts (yours).

Often, you might hear the term “CI/CD pipelines”, which refers to the concept of Continuous Integration and/or Continuous Delivery. In layman’s terms, it’s all about building, testing and deploying software in an automated fashion.

Project Panama for Newbies (Part 3)

Mon, 13 Sep 2021 08:53:47 +0000

Updated December 31, 2025: This article now features Java 25 and the Foreign Function & Memory (FFM) API, which has been a standard feature since JDK 22 (JEP-454 ).

Panama for newbies Part 3

Introduction

Welcome to the third part of the series on Java’s Project Panama for newbies. Before jumping into this article, I want to congratulate you for getting this far, you deserve a virtual pat on the back!

Learn JShell with JavaFX in Only 60 Seconds

Mon, 12 Jul 2021 10:54:56 +0000

Spoon boy : Do not try and bend the spoon. That’s impossible. Instead… only try to realize the truth.
Neo : What truth?
Spoon boy : There is no spoon.
Neo : There is no spoon?
Spoon boy : Then you’ll see, that it is not the spoon that bends, it is only yourself.

– The Matrix, a conversation between Neo and Spoon boy.

In the classic science fiction movie, The Matrix, there’s a cool special effect better known as the falling or raining green code effect. In one scene the character named ‘Cypher’ played by Joe Pantoliano explains how they can monitor activity inside the matrix by looking at the patterns as the code rains down. He claims it’s done this way to simplify seeing people in the matrix than other means due to the fact that there is just way too much data (movie scifi magic talk).

Announcement: Friends of OpenJDK Podcast #1

Fri, 09 Jul 2021 08:39:39 +0000

Foojay community members discuss recent news:

JavaFX Skins for cross-platform apps on Android, iOS, and regular computers.
BlockHound, for detecting cases of blocking in reactive (non-blocking) applications.
JEP 411, the SecurityManager deprecation
The recent Snyk/Azul community survey

Sorry, this recording got “lost in cyberspace…”

Creating a JavaFX World Clock from Scratch (Part 6)

Fri, 25 Jun 2021 16:48:48 +0000

Wherever you go, no matter what the weather, always bring your own sunshine. – Anthony J. D’Angelo

Hello, and welcome to the last part of this series of articles on creating a JavaFX World Clock from scratch!

In this part, I will show you how to make WebService calls (RESTful) to retrieve weather data based on geographic locations.

If you remember, in Part 5 you learned how to use the JavaFX WebView and the popular mapping library Leaflet JS enabling the user to discover geographic locations. In Part 6, I will show you how I used Java 11’s Http Client to retrieve and display weather content. If you are new to this series, you can visit Part 1 -5 .

Beginning JavaFX Applications with IntelliJ IDE

Wed, 28 Apr 2021 19:33:58 +0000

JavaFX in IntelliJ IDE

This article is for the beginner who wants to get started developing JavaFX applications using Jetbrains’ IntelliJ IDE. The article will create three flavors of a HelloWorld JavaFX application as follows:

Plain - Create a new project from scratch using no build tools
Maven - Create a new project using the Maven build tool
Gradle - Create a new project using the Gradle build tool

While this article may seem elementary for some, I believe it can help newcomers to the JavaFX platform avoid some pitfalls and really hit the ground running.

Creating a JavaFX World Clock from Scratch (Part 4)

Fri, 09 Apr 2021 07:51:05 +0000

“The tools we use have a profound (and devious!) influence on our thinking habits, and, therefore, on our thinking abilities.” – Edsger W. Dijkstra, 18 June 1975

Hello and welcome to Part 4 of a series of blog entries on how I created a “sci-fi” looking world clock using JavaFX. If you are new to this series you can visit Part 1 , 2 , & 3 .

Creating a JavaFX World Clock from Scratch (Part 3)

Fri, 02 Apr 2021 09:51:45 +0000

An old trick well done is far better than a new trick with no effect. – Harry Houdini

Welcome back to the series of blog entries on how I created a “sci-fi” looking world clock using JavaFX. If you are new to this series you can visit Part [1] & [2] .

Creating a JavaFX World Clock from Scratch (Part 2)

Thu, 24 Dec 2020 09:46:11 +0000

“The only way to learn mathematics is to do mathematics.” – Paul Halmos[1]

Introduction

Welcome to Creating a JavaFX World Clock from Scratch Part 2!

This is the second installment of a series of blog entries on how I created a “sci-fi” looking world clock using JavaFX.

If you have not read Part 1[2] please see the introduction section of the Creating a JavaFX World Clock from Scratch (Part 1) [2] .

Creating a JavaFX World Clock from Scratch (Part 1)

Mon, 14 Dec 2020 09:27:54 +0000

Good design’s not about what medium you’re working in. It’s about thinking hard about what you want to do and what you have to work with before you start." – Susan Kare [6]

Introduction

Welcome to Creating a JavaFX World Clock from Scratch (Part 1)! In this series of blog entries I would like to show you how I created a “sci-fi” looking world clock that happens to be a cross-platform Java desktop application.

How to get a JavaFX App on ZuluFX in 60 Seconds

Sun, 23 Aug 2020 06:57:41 +0000

Most Java developers probably know by now that Oracle has open sourced the Java JDK and hosted its source code on Github (aka Project Skara ).

Oracle encourages companies to get paid support for their LTS (Long-term support) versions of the JDK, however for the mass majority of developers (like myself), who still want to enjoy free versions of the latest JDK and JavaFX, we can now get distributions from third-party vendors or build it ourselves (OpenJDK / OpenJFX ).