Everything in


I occasionally make YouTube-Videos, mostly about Java - here they are:

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What Happened to Java's String Templates? Inside Java Newscast #71#video#project‑amber
JDK 23 doesn't contain the string template preview that was present in JDKs 21 and 22. Let's discuss why the feature was removed (probably not for the reasons you think), what a new proposal could look like, and when we may see it.
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All Java 23 Features - Inside Java Newscast #70#video#java‑23
Java 23 will be released on September 17th but it's branched today (June 6th 2024) and so its feature set is final. Generational ZGC, Markdown in JavaDoc, deprecations in Unsafe, the removal of string template, and the thoughtful evolution of eight preview features. Let's take a closer look!
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Module Imports in Java 23 - Inside Java Newscast #69#video#java‑23 #j_ms
To reduce the overhead of using APIs, particularly in single source files, Java 23 previews module import declarations of the form import module $moduleName, which import all packages exported by the named module
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Java Withers - Inside Java Newscast #67#video#records
JEP 468 proposes a solution to the verbosity that can come from modeling mutable state with immutable records: derived record creation aka with expressions aka withers.
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Java 23: Restoring the Balance with Primitive Patterns - Inside Java Newscast #66#video#java‑23 #pattern‑matching
The ongoing introduction of pattern matching to Java has unbalanced the language. Here's how primitive patterns (in Java 23) and other patterns (in future versions) will fix that.
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(Dirty?) Tricks in Java 22 - Inside Java Newscast #64#video#pattern‑matching #optional #clean‑code
Pattern matching Optional, expanding sealed type hierarchies, nesting switches, reverting instanceof, and more - so many (dirty) tricks to play around with in modern Java
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Does Java 22 Kill Build Tools? - Inside Java Newscast #63#video#java‑22 #on‑ramp
Java 22 brings multi source-file execution to the platform. It allows us to run programs consisting of multiple source files and even dependencies with just a simple java command. For experienced developers, this will make exploration and experimentation simpler but it's a real game changer for people just learning Java or even just to program: They can now write Java code from single to multiple source files and even add dependencies before they need to consider an IDE or build tool.
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Java 22 Previews Statements Before super(...) and this(...) - Inside Java Newscast #62#video#java‑22 #project‑amber
Whether for validation, preparation, or splitting and sharing arguments, it can be quite annoying that Java doesn't allow statements before the super(...) or this(...) call in a constructor. Luckily Java 22 is about to change that with JEP 447, which previews statements before the explicit constructor invocation.
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Java's Plans for 2024 - Inside Java Newscast #61#video#project‑amber #project‑babylon #project‑leyden #project‑lilliput #project‑loom #project‑panama #project‑valhalla
In 2024, Java keeps evolving. Here's what the big OpenJDK projects (Amber, Leyden, Valhalla, and more) plan for this year and how that will push Java forward.
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Java Highlights of 2023 - Inside Java Newscast #60#video#turn‑of‑the-year #on‑ramp #java‑8 #community #meta
2023 is coming to a close and it was quite a year for Java! Let's look back at some of the highlights: on-ramp improvements, why Java 8 is dying, JVMLS, community achievements, and how cool our YouTube channel is. 😊
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How Project Valhalla And JSpecify Can Kill NPEs#video#project‑valhalla #libraries #conversation
Project Valhalla's value types need to be aware of which instance can be null and which can't, so the JVM can inline them. So will Java get a null-aware type system after all? Not quite, but it may get close and JSpecify can help with some of those steps.
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Java, null, and JSpecify#video#libraries
Kevin Bourrillion gives an introductory presentation on JSpecify, a project spearheading a set of standard annotations for Java static analysis, specifically for tracking null
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Java 22 Unpacking - Inside Java Newscast #59#video#java‑22
JDK 22 will be released on March 19th 2024 but it's forked today (Dec 7th 2023) and so its feature set is final. Unnamed patterns and variables, the FFM API, and multi-source-file programs are the highlights but there is so much more. Let's unpack!
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Java On The GPU - Inside Java Newscast #58#video#project‑babylon
Babylon is OpenJDK's newest big project, aimed at easing execution of Java code on the GPU, which will unlock machine learning and artificial intelligence on the JVM. Here's all about its background, prototypes, and plans.
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Implementing New Java Stream Operations#video#streams
Implementing a bunch of Gatherers to better understand the proposed addition to the stream API
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Better Java Streams with Gatherers - Inside Java Newscast #57#video#streams
Stream::gather is a new intermediate meta-operation that allows the JDK and us to implement all kinds of intermediate operations as Gatherers without overloading the Stream interface
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Java Architects Answer Your Java Questions#video#community #project‑amber #project‑loom #project‑valhalla #project‑leyden
Try/catch expressions? Valhalla timeline? Synchronizing virtual threads? And many more. Here's how Brian Goetz, Alan Bateman, Stuart Marks, and Kevin Rushforth answered your questions.
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New Class-File API Will Make Java Updates Easier - Inside Java Newscast #56#video#java‑next #migration
How the new class-file API that Brian Goetz presented at JVMLS will greatly improve the situation around Java updates
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Java 21 Pattern Matching Tutorial#video#java‑21 #pattern‑matching #java‑basics
Java 21 is the first Java release with all essential pattern matching features finalized: sealed types, type patterns, an improved switch, records, and record patterns. This tutorial puts them all together.
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Upgrading From Java 17 To 21: All You Need To Know#video#java‑21 #migration
Java 21 is chock-full of great features but that's for naught of you can't actually upgrade, so I've collected all potential upgrade hurdles and we'll go over every issue that you may encounter on the road from Java 17 to 21
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Java 21 is no LTS Version - Inside Java Newscast #52#video#java‑21
Let's separate Java from JDK, OpenJDK from its vendors, and maintenance from support, so we better understand how the ecosystem functions and what long-term support really means.
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Java 21 - The Other Side - Inside Java Newscast #51#video#java‑21
OMG, how is there even more in JDK 21?! Scoped values preview, key encapsulation mechanism API, a new JFR command, and various API improvements. Generational Shenandoah is out, though, and it doesn't look good for the 32-bit Windows port either.
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All That is in Java 21?! 😱 - Inside Java Newscast #50#video#java‑21
JDK 21 is almost too good to be true: It finalizes virtual threads, sequenced collections, generational ZGC, and the pattern matching basics; and evolves and introduces over half a dozen other features.
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Script Java Easily in 21 and Beyond - Inside Java Newscast #49#video#java‑basics #on‑ramp
To give Java and programming beginners a better learning path, JEP 445 proposes to allow stand-alone main methods that are non-public, non-static, and don't have an args array and we're also JEP draft for multi-file programs
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Save 10-20% Memory With Compact Headers - Inside Java Newscast #48#video#performance
JDK Enhancement Proposal 450 proposes to merge a compressed class word into the mark word to reduce object header size on 64-but systems from 96-128 bits to 64 bits, thus saving 10-20% of heap space
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Getting Rid Of Unused Variables (Finally) - Inside Java Newscast #46#video#pattern‑matching
JEP 443 proposes to add unnamed variables and patterns to Java. With them, unused variables and patterns can be replaced by a single underscore, which helps writing readable and maintainable code.
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New (Sequenced) Collections In Java 21 - Inside Java Newscast #45#video#collections #java‑21
All lists, some sets, and some maps have an encounter order, but the collections framework has no type to capture this property and define operations like getting or removing first and last elements or iterating in reverse order. Sequenced collections will fix that in Java 21.
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The Holy Grail of Java Performance - Inside Java Newscast #43#video#project‑leyden
The goal of Project Leyden is to improve the startup time, time to peak performance, and footprint of Java programs. Project lead Mark Reinhold recently proposed to extend the Java programming model with features for selectively shifting and constraining computation with condensors. Let's look at his white paper and roadmap.
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Prepare Your Code Bases For Future Java - Inside Java Newscast #41#video#deprecation #tools
What do the security manager, applet API, finalization, and primitive wrapper constructors have in common? What about CMS, Nashorn, RMI activation, and biased locking? And what does jdeprscan have to do with all of this?
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Java's Plans for 2023 - Inside Java Newscast #40#video#project‑amber #project‑galahad #project‑leyden #project‑lilliput #project‑loom #project‑panama #project‑valhalla
A summary of what happened in 2022 and what will probably happen in 2023 for Projects Amber, Galahad & Leyden, Lilliput, Loom, Panama, and Valhalla
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24 Java Features You Missed In 2022 - Inside Java Newscast #39#video#collections #documentation #java‑18 #java‑19 #pattern‑matching #performance #records
JDK 18 and JDK 19 preview a number of big ticket features but they also come with a lot of smaller improvements. Here are 24 less-known features that were added to Java in 2022. Among them additions to Future and ForkJoinPool, to HashSet and HashMap, Security and GC improvements, Custom Localized Date-Time Formats and an Internet Address Resolution SPI, and much more.
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GraalVM In OpenJDK And More JavaOne Announcements - Inside Java Newscast #36#video#community #java‑8 #java‑17 #openjdk #performance
Oracle will contribute GraalVM's just-in-time compiler and native image technology to OpenJDK. It will also create EA and GA builds for JavaFX 20+ and is hard at work at creating generational ZGC to vastly improve ZGC's already impressive performance. And then there's the Java SE Subscription Enterprise Performance Pack, a drop-in replacement for JDK 8 with JDK 17 performance.
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The Simplest Hello World - Inside Java Newscast #35#video#project‑amber #on‑ramp
Visibility, classes, methods, instance and static members, parameters - a newcomer to programming needs to learn all of these concepts to truly understand a simple hello-world program in Java. Time to make that simpler and cut down on what needs to be known up front.
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Loom in the Java Ecosystem - Inside Java Newscast #34#video#java‑19 #project‑loom #libraries
Among other things, Java 19 ships with virtual threads, structured concurrency APIs, sealed types, and pattern matching in switch - all of them as previews, but still very cool! I'm using these features here to create a GitHub crawler.
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Java 19 in Action - Inside Java Newscast #33#video#java‑19 #project‑loom
Among other things, Java 19 ships with virtual threads, structured concurrency APIs, sealed types, and pattern matching in switch - all of them as previews, but still very cool! I'm using these features here to create a GitHub crawler.
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String Templates, JavaFX 19, Deserialization, and more at JavaOne - Inside Java Newscast #32#video#javafx #java‑19 #serialization
String templates make it easy and safe to embed variables and expressions in strings; JavaFX 19 comes with many improvements, chief among them derived observables; and the deserialization filter can keep apps safe from certain attacks. More on all of this at JavaOne!
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Sequenced Collections, Purity, and more at JavaOne - Inside Java Newscast #31#video#collections #lambda
Sequenced collections introduce an abstraction for collections with a known encounter order like all lists and some sets and maps. It will be easy to add, get, or remove the first and last elements and to iterate or stream in reverse order. We're also discussing immutable collections and pure functions. More on all of this at JavaOne!
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Java Q&A - Inside Java Newscast #30#video#project‑leyden #project‑lilliput #project‑valhalla #project‑amber
We asked you for questions on YouTube, Reddit, and Twitter and are here to answer a bunch of them. From projects Amber to Valhalla, Leyden to Lilliput, from language to performance, from the immediate future to pipe dreams we covered a lot of ground.
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Data-Oriented Programming - Inside Java Newscast #29#video#records #sealed #pattern‑matching #patterns #techniques
Data-oriented programming focuses on modeling data as data (instead of as objects). Records for data and sealed types for alternatives let us model immutable data where illegal states are unrepresentable. Combined with pattern matching we get a safe, powerful, and maintainable approach to ad-hoc polymorphism that lets us define operations on the data without overloading it with functionality.
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What is OpenJDK? - Inside Java Newscast #28#video#openjdk #community #java‑basics
What's "OpenJDK" (or "the OpenJDK"?), how does it work, and what does it do? Here's the answer to these questions as well as explorations of JDK Enhancement Proposals, the Java Community Process, why there are so many JDK providers, and how long-term support works.
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Java 19 - The Best Java Release? - Inside Java Newscast #27#video#java‑19 #project‑amber #project‑loom #project‑panama
Java 19 is the first release to preview Project Loom's virtual threads and structured concurrency, Project Amber's record patterns, and Project Panama's foreign memory and function APIs. It also continues previews of pattern matching in switch and vector API. Put together, this makes it the most groundbreaking Java release in years and probably for years to come!
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Deconstructing Records in Pattern Matching - Inside Java Newscast #26#video#project‑amber #pattern‑matching
How record patterns use records' transparency to safely deconstruct them in pattern matching, allowing us to separate checking structure and value of data from processing it.
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News Grab Bag: Loom Virtual Threads, Lilliput, Pattern Matching, ... - Inside Java Newscast #25#video#project‑loom #tools #project‑lilliput #project‑amber #pattern‑matching #community
Project Loom's virtual threads are merged and ship with JDK 19 - here's to prepare for them. Also, news on Project Lilliput, proposal for record patterns in pattern matching, some astonishing numbers from Sonatype on Maven Central, and the move of OpenJDK to openjdk.org.
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when And null In Pattern Matching - Inside Java Newscast #24#video#project‑amber #pattern‑matching
JEP 427 proposes two changes to pattern matching in switch: 1. Guarded patterns, which belonged to patterns, are replaced with when clauses, which belong to the case. 2. null needs to be handled by a specific case null.
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Virtual Thread Deep Dive - Inside Java Newscast #23#video#project‑loom
Now that Project Loom's JEP 425 officially proposes virtual threads, it's time to take a close look at them: scheduling and memory management; mounting, unmounting, capturing, and pinning; observability; and and what you can do for optimal scalability - this episode has (almost) everything on virtual threads!
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All About JDK 18 - Inside Java Newscast #21#video#java‑18 #project‑amber #project‑panama #pattern‑matching #tools #reflection #documentation
Refinements in pattern matching and Panama's foreign and vector APIs; a new command jwebserver and a new IP address resolution SPI; preparing code for UTF-8 becoming the default character set and for the eventual removal of finalization; and a few more bits and pieces.
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State of Pattern Matching with Brian Goetz#video#project‑amber #pattern‑matching #conversation
Conversation with Project Amber lead Brian Goetz about pattern matching in Java: Why Map::get should be a pattern, the linear thinking trap and how it impacts null handling in pattern matched, exhaustiveness in switch statements and the rehabilitation of switch.
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Compiled And Tested Code In Javadoc - Inside Java Newscast #20#video#java‑18 #documentation
Short code snippets in Javadoc are a great way to document an API, but they're brittle. JDK 18 / JEP 413 solves that problem by allowing us to reference snippets from external files that are compiled and tested.
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Where to use Optional - Inside Java Newscast #19#video#optional
Is it ok to use Optional as parameter type? Overloading is an alternative, but how well does it stack up? Thoughts on this question (and other Optional-related ones) can usually be put into one of three (and a half) categories.
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Java's Plans for 2022 - Inside Java Newscast #18#video#project‑amber #project‑loom #project‑panama #project‑valhalla
An update on Java's four key projects: Valhalla, Panama, Loom, and Amber - what they're about, where they are right now, and what their plans are for 2022 and beyond.
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Project Loom Brings Structured Concurrency - Inside Java Newscast #17#video#java‑18 #project‑loom
Project Loom aims to bring structured concurrency to Java, a concept that compares to "regular" concurrency like structured programming compares to GOTO-programming - let's dip our toes into this new concept. Also: JDK 18 feature freeze, JDK migration guide, and nifty things to do with the new simple web server.
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What Happens to Finalization in JDK 18? - Inside Java Newscast #15#video#java‑18 #deprecation #migration #reflection
Finalization was part of Java from day one to help developers manage resources but it turns out that it's really not good at that. Here's why and what's gonna happen next. Also, reflection and method handles.
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11 Tricks From dev.java - Inside Java Newscast #14#video#generics #lambda #pattern‑matching #records #serialization
From compact record constructors to boolean expressions in pattern matching, from generic wildcards to chaining predicates and comparators, from jpackage to jlink - here are 11 Java tricks handpicked from dev.java.
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Faster LTS and free JDK with Java 17 - Inside Java Newscast #12#video#java‑17
Java 17 comes with more than just new features. A faster LTS cadence and free Oracle JDK make this the best-supported modern release ever.
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The State of Project Valhalla with Brian Goetz#video#conversation #project‑valhalla
Conversation with Project Valhalla lead Brian Goetz about Java's original sin, unifying the type system, expanding generics, current work, the project timeline, and more.
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Fast and Secure Inter-process Communication on JDK 16 - Inside Java Newscast #11#video#java‑16
JDK 16's socket channel / server-socket channel API can use Unix domain sockets for faster and more secure inter-process communication on the same host - also: JDK 17 final release candidate and Oracle Developer Live
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Random Numbers and JDK Flight Recorder - Inside Java Newscast #9#video#java‑16 #java‑17 #random #performance #tools
The new API for random number generation in Java 17 - why it needed to change and how the new API is more usable, extensible, and robust - and how to get started with JDK Flight Recorder, particularly on Java 16.
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Incremental Evolution, Pattern Switches vs Visitor Pattern, and Wayland Support - Inside Java Newscast #8#video#java‑17 #project‑panama #pattern‑matching #sealed #patterns
How the six-month release cadence enabled a more incremental evolution of the Java platform and how pattern switches and sealed classes are an alternative to the visitor pattern. Also, maybe Wayland support for Java.
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Handling null and Upgrading Past Java 8 - Inside Java Newscast #7#video#migration #optional #switch #project‑valhalla
Dealing with null is never fun, so in this newscast, I explain how to best handle it, what tools can do, and how recent and upcoming language changes help dealing with it. I'll also look at a recent blog post about how Netflix upgraded from Java 8 to 16.
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The State of Project Panama with Maurizio Cimadamore#video#conversation #project‑panama
Conversation with Project Panama lead Maurizio Cimadamore about the project's core mission, the split into foreign-memory access and foreign linker APIs, jextract, performance, interaction with Project Valhalla, the timeline, and more.
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The State of Project Loom with Ron Pressler#video#conversation #project‑loom
Conversation with Project Loom lead Ron Pressler about the project's core mission, challenges like interaction with debuggers and garbage collectors, the timeline for the next steps, compatibility and more.
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Java 17: Features and Development - Inside Java Newscast #6#video#java‑17 #openjdk
Java 17, the next long-term support release, enters feature freeze and the release preparations begin today (June 10th). A good time to take a closer look at the list of JEPs as well as the development process.
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Pattern Matching in Switches and Security Manager Deprecation - Inside Java Newscast #5#video#switch #pattern‑matching #deprecation
JEP 406, which is a candidate for Java 17, introduced pattern matching in switch statements and expressions, introduces guarded patterns, and improves null handling. Then we need to talk about JEP 411's deprecation of the security manager.
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5 Secret Java API Tricks and Record Semantics - Inside Java Newscast #4#video#records
Five nifty Java API features that you need to know (and many more in the linked thread) and a quick explanation why Java records are not about reducing boilerplate.
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JUnit Pioneer - An Exploratory Mission to Jupiter And Beyond#video#junit‑pioneer
From growing a community on Twitch to strong documentation, from squashing commits to one-click releases - this presentation covers JUnit Pioneer in all detail
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Quicker Java and JDK 16 compatibility - Inside Java Newscast #3#video#java‑16 #vector #java‑17
A walk through language features, APIs, and JDK capabilities that make Java quicker to use with less ceremony and more immediate results. Also, a rundown of some of the projects with all tests green on JDK 16.
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Java Generics III - Wildcards#video#generics
Second part of a short series on Java Generics - this one explains generics. ? extends Number - that kinda thing.
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Java Generics II - Bounded Type Parameters#video#generics
Second part of a short series on Java generics - this one explains bounded type parameters. T extends Number - that kinda thing.
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Vector API, Record Serialization, And Java 17 Release Schedule - Inside Java Newscast #2#video#java‑16 #vector #java‑17
Short introduction to the Vector API (incubating in JDK 16) and an update on serializing records. Also, a quick mention of JEP 356 in JDK 17 and the proposed release schedule.
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Java 16 Rundown, First Of Java 17 - Inside Java Newscast #1#video#java‑16 #java‑17
Java 16 got released, so I go over most of the additions like records, Stream APIs, Unix Domain Socket support, and much more. Then there's a first glimpse at Java 17.
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Patterns, switch, and Valhalla's Primitive Classes - JDK News #2#video#java‑next #openjdk #project‑amber #pattern‑matching #project‑valhalla #primitive‑classes
Project Amber brings new patterns and puts them into switch while Project Valhalla takes off and proposes introducing primitive classes
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Java's Quirks and Wrong (?) Defaults with Brian Goetz#video#conversation #migration #optional #serialization
Mutability, nullability, serialization, primitives - Nicolai Parlog discusses with Java language architect Brian Goetz why Java is the way it is.
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Pattern Matching Quartet - JDK News #1#video#java‑next #project‑amber #pattern‑matching
A summary of four recent discussions about pattern matching on the Project Amber mailing lists
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Java Generics I - The Basics#video#java‑basics #generics
First part of a short series on Java generics - this one explains the basics
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Modularity with Oliver Drotbohm#video#architecture #conversation #j_ms
Oliver and I discuss modularity in Java with a focus on the Java module system
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How We Upgraded From Java 8 And Why You Can (And Should) Do It Too#video#community #migration
My two minutes of fame during the Oracle Code One 2019 keynote
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The Java Module System with Sander Mak#video#conversation #j_ms
At J-Fall 2018 I talked to Sander Mak, modularity expert at Luminis, about the Java module system (J_MS), its adoption, how it compares to OSGi, and more.
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Caliz III: Hashing scripts and background compilation#video#performance #tools
Letting Caliz store native images and only create them for a given Java "script" (single source file) if needed
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Caliz II: Wrapping Graal AOT#video#performance #tools
Extending Caliz to create native images of Java "scripts" (single source files) with with Graal
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Caliz I: Wrapping JVM 11 and learning about Graal AOT#video#performance #tools
First steps toward an acceptable scripting experience with single-source-file execution and Graal native images
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Java 12 Experiments (Live Stream)#video#java‑12
In my first live stream ever (yay!), we explored Java 12's API improvements
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Utilities, Singletons and Dependency Injection - Effective Java, Items 3-5#video#book‑club #patterns
Mildly surprising (to me), it makes sense to discuss these three patters in one video - so here it goes
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Maven 3 / 4 / 5 with Robert Scholte#video#conversation #tools
Maven is one of the cornerstones of the Java ecosystem - here I talk with Robert Scholte, Chairman of the Apache Maven projects
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First Contact with Switch Expressions in Java 12#video#java‑12 #switch
With Java 12, switch is no longer just a statement, but becomes an expression. Let's take a look!
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Use Builders... Cautiously - Effective Java, Item 2#video#book‑club #patterns
Why and how to avoid the builder pattern and how to make best use of it if you can't
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Java 11: A New Dawn - Releases, Oracle JDK vs OpenJDK, and LTS#video#java‑11 #java‑next
Oracle's announcements of the six-month release cadence and new licensing caused quite a ruckus - now that things calmed down, lets discuss where we're headed
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Static Factory Methods - Effective Java, Item 1#video#book‑club #patterns
How to use static factory methods to overcome three shortcomings of constructors
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Kicking off a series on Effective Java, Third Edition#video#book‑club
Kick-off to
a YouTube series on Effective Java, Third Edition - let's find some angles Josh didn't cover
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First contact with var in Java 10#video#java‑10 #var
How to use var, where it works and where it doesn't (and why), and how it might impact readability
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Welcome, Java 9!#video#community #java‑9
Java 9 is out today and with other members of the community I'm throwing a welcome party. Get an all around view on the new Java release with various opinions, tips, and great sources!
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Impressions of JavaZone 2017#video#community
A few impressions of my stay at JavaZone 2017 to music from
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Parameterized Tests in JUnit 5#video#junit‑5
At JavaLand 2017, I spent 15 minutes exploring JUnit 5's (then) brand-new parameterized test feature in a NightHacking session
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Rewrite, Architecture, Extensions Of JUnit 5#video#community #junit‑5
What were the reasons for the rewrite? How does JUnit 5 compare to JUnit 4? What's so special about the architecture and the extension points?