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lation to experiment with java s preview features 2019 07 11 definitive guide to text blocks in java 13 post java 13 java basics java 13 introduces text blocks string literals that span multiple lines learn about syntax indentation escape sequences and formatting 2019 06 19 best practices considered harmful talk techniques a lightning talk about how best practices promote a one size fits all mentality that harms our ability to create solutions that are tailored to the problems at hand 2019 06 03 immutable collections in java not now not ever post collections the jdk contains immutable collections but no type immutablecollection here s why that s so and why it won t change 2019 05 29 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 2019 05 26 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 2019 05 16 jakarta ee javax and a week of turmoil post community during a week of turmoil many people have written about jakarta ee and javax this post summarizes the community s opinions and gives you plenty of links 2019 05 13 caliz ii wrapping graal aot video performance tools extending caliz to create native images of java scripts single source files with with graal 2019 05 01 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 2019 04 18 definitive guide to java 12 post java 12 migration detailed java 12 guide migration versions switch expressions teeing collectors indenting transforming strings and more default cds shenandoah g1 2019 03 18 teeing collector in java 12 post java 12 streams the teeing collector available since java 12 as collectors teeing forwards its input to two other collectors before merging their results with a function 2019 03 04 java 12 experiments live stream video java 12 in my first live stream ever yay we explored java 12 s api improvements 2019 02 24 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 2018 11 27 eleven hidden gems in java 11 post java 11 eleven small but shiny additions in java 11 to classes like string path files collection optional and others that make coding a little more elegant 2018 11 12 fun with var talk core lang default methods generics lambda java 10 var a live coding talk where i show off all you need to know about var in java and then some 2018 11 08 scripting java 11 shebang and all post java 11 tools on ramp on java 11 you can run a single source file without compiling it beyond experimentation you can write scripts this way even shebang is supported 2018 11 06 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 2018 10 24 reactive http 2 requests and responses in java 11 post java 11 with java 11 s new reactive http 2 api request and response bodies can be handled with reactive streams you can throttle stream and cancel early 2018 10 22 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 2018 10 18 java 11 http 2 api tutorial post java 11 java basics tutorial for java 11 s new http 2 api with httpclient httprequest and httpresponse at its center shows synchronous and asynchronous request handling 2018 10 15 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 2018 10 09 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 2018 10 02 all you need to know for migrating to java 11 post java 11 migration migrating from java 8 to java 11 this has got you covered licensing long term support preparations version requirements migration challenges and more 2018 09 25 static factory methods effective java item 1 video book club patterns how to use static factory methods to overcome three shortcomings of constructors 2018 09 24 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 2018 09 20 junit 5 architecture or what s jupiter post architecture junit 5 libraries testing the junit 5 architecture promotes a better separation of concerns than junit 4 did it also provides clear apis for testers jupiter and tools platform 2018 08 05 junit 5 basics test lifecycle assertions assumptions and more post java basics junit 5 libraries testing the basics of junit 5 how to use test beforeall beforeeach aftereach afterall assertions and assumptions how to disable name and tag tests 2018 08 05 junit 5 conditions enabled disabled customized post junit 5 libraries testing a detailed look at junit 5 s disabled disabledonos disabledonjre etc and how to create custom conditions to flexibly disable test methods 2018 08 05 junit 5 dynamic tests post junit 5 lambda libraries testing with junit 5 s dynamic tests we can create tests at run time for example to parameterize tests create hierarchical test plans or define tests with lambdas 2018 08 05 junit 5 extension model how to create your own extensions post architecture junit 5 libraries testing the junit 5 extension model enables detailed flexible and powerful additions to junit 5 s core features for that it provides specific extension points 2018 08 05 junit 5 parameterized tests post junit 5 libraries testing thorough introduction to parameterized tests in junit 5 with parameterizedtest argument sources eg methodsource csvsource and argument converters 2018 08 05 junit 5 setup in intellij eclipse maven and gradle post tools junit 5 libraries testing how to set up junit 5 so tests run in intellij eclipse maven gradle or if all else fails via junit 4 or on the command line 2018 08 05 unlocking traits with var post default methods java 10 lambda var in java 10 var makes it is possible to ad hoc combine traits into an instance that matches your exact requirements alas it has some downsides 2018 06 25 tricks with var and anonymous classes that you should never use at work post core lang java 10 var local variable type inference with var makes it easier to work with anonymous classes e g for ad hoc fields and methods don t do it though 2018 06 18 unlocking intersection types with var post generics java 10 var java 10 s var makes intersection types in java more approachable generics tricks are still needed but var makes it easy to declare such variables 2018 06 11 how to use multi release jars to target multiple java versions post tools java 9 multi release jars allow you to create a single jar that contains bytecode for several java versions with jar version 9 or 10 or presented with a multi release jar jvms version 9 and later will load the code that was included for their version 2018 02 26 code first java 9 tutorial post java 9 migration streams optional collections j_ms showing code for the most important java 9 features private interface methods stream and optional apis collection factories reactive streams stack walking multi release jars redirected platform logging unified logging the module system and more if you re new to java 9 start here 2018 02 05 goodbye 2017 hello 2018 post turn of the year 2017 draws to a close and 2018 is knocking my annual review and preview went to my newsletter so subscribe or head over to medium to read them 2017 12 31 maven on java 9 and later six things you need to know post java 9 tools how to use the compiler executable toolchains and mavenrc to run maven on java 9 and how to use mvn jvm config and profiles to configure your build 2017 12 18 first contact with var in java 10 post java 10 java basics var java 10 introduces the var keyword which lets the compiler infer local variable types here s how var works why it exists how it impacts readability 2017 11 16 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 2017 11 16 making jsr 305 work on java 9 post java 9 j_ms migration using annotations from jsr 305 nonnull nullable and javax annotation generated postconstruct on java 9 causes a split package here s the fix 2017 10 23 code first java module system tutorial post java 9 java basics j_ms tutorial of java 9 module system basics declare modules with module info java compile package launch them learn of module path and readability graph 2017 10 03 unified logging of jvm messages with the xlog option post java 9 java basics java 9 introduces unified logging a central mechanism configurable with xlog to observe class loading threading garbage collector module system etc 2017 09 27 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 2017 09 21 impressions of javazone 2017 video community a few impressions of my stay at javazone 2017 to music from willrock 2017 09 20 five command line options to hack the java module system post java 9 j_ms get your code running on the java 9 module system with the command line options add exports add opens add modules add reads and patch module 2017 09 11 planning your java 9 update post java 9 jdeps migration a java 9 update is not always trivial quite the opposite migrating to java 9 can be challenging here s how to gather and categorize problems 2017 08 14 to jar hell and back talk java 9 java 11 j_ms migration a live coding talk where we take a typical java 8 code base and update it to java 9 and beyond overcoming some common and some less common hurdles like dependencies on internal apis and split packages 2017 07 25 java 9 migration guide the seven most common challenges post java 9 j_ms migration solutions to the seven most common challenges for a java 9 migration each of them explained with background symptoms and fixes 2017 07 24 a jdeps tutorial analyze your project s dependencies post java basics j_ms jdeps tools jdeps is a dependency analysis tool for java bytecode class files and jars learn how to use filters aggregate results and create diagrams 2017 07 17 java 9 resources talks articles repos blogs books and courses post java 9 java 9 draws and the number of posts and talks about it skyrocketed in the recent months here s a list of recommended talks and articles but also further resources where new high quality content will pop up 2017 05 02 optional dependencies with requires static post java 9 j_ms the java platform module system allows optional dependencies with requires static they are accessible at compile but can be absent at run time 2017 04 03 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 2017 03 29 repackaging exceptions in streams post clean code java 8 lambda streams how to repackage checked exceptions that get thrown in a java stream pipeline so that they can be thrown without the compiler complaining about it 2017 02 13 expert java 8 talk java 8 lambda streams optional default methods with this talk i help you get the most out of lambdas stream s optional s and default methods helping you master java 8 s core features 2017 02 07 why elvis should not visit java post clean code optional rant the desire for the elvis operator for easier null handling echoes through the java community but due to java s type system it should never be introduced 2017 01 31 spjcn iv quo vadis scala post community in the fourth issue of sitepoint s java channel newsletter from october 21st 2016 i summarize the discussion of scala s presumable demise 2017 01 26 reflection vs encapsulation post java 9 j_ms project jigsaw reflection reflection wants to break into all code encapsulation wants to give modules a safe space how can this stand off be resolved 2017 01 18 hello 2017 post turn of the year to finish all the projects i started in 2016 i will have to be disciplined and focused in 2017 discipline and focus what delightful words to start 2017 2017 01 01 goodbye 2016 sorry for fucking up post turn of the year besides humanity as a whole fucking up 2016 it went well for me professionally maybe because i only cared about me possible 2016 12 29 spjcn iii javaone 2016 post community in the third issue of sitepoint s java channel newsletter from october 7th 2016 i summarize javaone 2016 and recommend interesting talks to watch 2016 12 21 publishing snapshots with gradle s maven publish plugin post tools a step by step tutorial how to use gradle and the maven publish plugin to publish snapshots to sonatype s maven snapshot repo 2016 12 14 spjcn ii what s taking so long post java 9 project jigsaw in the second issue of sitepoint s java channel newsletter from september 23rd 2016 i wonder why java 9 takes so long 2016 12 07 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 2016 12 06 what future java might look like post java next project valhalla generics pattern matching java s future is full of cool advances data classes value types generics over primitives pattern matching etc let s peek into java s future 2016 12 01 spjcn i hello world post community in the first issue of sitepoint s java channel newsletter september 9th 2016 i babble about community and conferences 2016 11 24 code reviews at disy observations post code review techniques after reviewing almost all code we wrote for 18 months completing some 1 500 reviews we want to share some recommendations 2016 10 26 code reviews at disy how we review post code review techniques after setting out to create a peer review culture we came up with a workflow and picked a tool yes crucible that would help us get there 2016 09 26 the ultimate guide to java 9 post java next java 9 java 9 is coming besides jigsaw it brings new language features and many new and improved apis check out the ultimate guide 2016 09 05 rebutting 5 common stream tropes post java 8 rant streams articles about java 8 s streams often repeat a bunch of tropes succinctness ugly mechanics anemic pipelines weak exception handling...
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