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approaches to apply right from the start prefer HTML over JSF tags. no logic in getters (can be called multiple times) – especially for the rendered attribute. avoid logic in EL expressions. avoid using h:outputText. instead, use an EL expressions. if you…

Another day, another project turned down, because they use Jenkins for CI/CD (the requirements were that I actually would have had to work with that piece of crap).

general availability on 2014-03-18 The original schedule aimed to ship the release in early September 2013, but due to an increased focus on browser-related security issues that date was not achievable.

general availability on 2017-09-22 JEPs Java 9 comes with a vast list of features.

general availability on 20 September 2022 JEPs new features JEP state summary /remark JEP 405: Record Patterns preview introduces record patterns to deconstruct record values.

general availability on 2022-03-22 JEPs new features JEP state summary /remark JEP 400: UTF-8 by Default standard specifies UTF-8 as the default charset of the standard Java APIs.

general availability on 2021-09-14 JEPs new features JEP state summary /remark JEP 306: Restore Always-Strict Floating-Point Semantics standard make floating-point operations consistently strict, rather than have both strict floating-point semantics (stri…

Java EE versions

Java EE and Jakarta EE versions

Some information on available JDKs and their vendors

general availability on 2021-03-16 JEPs new features JEP state summary /remark JEP 338: Vector API (Incubator) incubator provide an initial iteration of an incubator module, jdk.incubator.vector, to express vector computations that reliably compile at run…

general availability on 202-09-15 JEPs new features JEP state summary /remark JEP 339: Edwards-Curve Digital Signature Algorithm (EdDSA) standard EdDSA has a better performance than the existing ECDSA implementation (which uses native C code) at the same…

general availability on 2020-03-17 JEPs new features JEP state summary /remark JEP 305: Pattern Matching for instanceof (Preview) preview instanceof now saves you from explicit, verbose casts.

general availability on 2019-09-17 jeps new features jep state summary /remark jep 351: zgc, uncommit unused memory (Experimental) experimental zgc does not currently uncommit and return memory to the operating system, even when that memory has been unused

general availability on 2019-03-19 JEPs new features JEP state summary /remark JEP 189: Shenandoah, A Low-Pause-Time Garbage Collector (Experimental) experimental a GC which reduces GC pause times by doing evacuation work concurrently with the running Java

general availability on 2018-09-25 JEPs new features JEP state summary /remark JEP 181: Nest-Based Access Control standard introduce nests, an access-control context that aligns with the existing notion of nested types in the Java programming language.

general availability on 2018-03-20 JEPs new features JEP state summary /remark JEP 286: Local-Variable Type Inference standard enhance the Java Language to extend type inference to declarations of local variables with initializers.

creating arrows for technical documentation with GIMP and draw.io

WildFly standalone installation and basic configuration walkthrough

overview of the WildFly role based access control structure RBAC and its configuration options

What I wanted to do for a long time, but didn’t have the time to do (or I thought I didn’t have the time): I finally got this website up and running, with the blog you’re reading right now, technical documentation and my portfolio.

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basic operations create a branch – git branch <new branch> checkout a branch – git checkout <branch> list local branches – git branch list remote branches – git git branch -r list local and remote branches – git branch -a delete a local branch – git branch

viewing the commit history with git log with custom formats for more information on less terminal real estate

how to revert staged and unstaged changes while working with git

configuration of git after initial installation with settings for users, repos and system wide settings

how to customize git in bash for a more comfortable and efficient working experience

variable names Variable names are case sensitive.

User input from the terminal can be processed with the command read By default read reads user input from

For output, two commands can be used: echo and printf.

Shell programming can be used to write shell scripts that simplify tasks that can be done on the command line.

this is a kitchen sink for stuff that I throw in, before I forget it, and to redistribute it later to the appropriate pages

some of the information presented in this series JShell guide stems from the following references:

the jshell configuration file On Linux systems, the startup configuration is written to the file ~/.java/.userPrefs/tool/JShell/prefs.xml .

A jshell script file is a sequence of jshell commands and/or snippets, one command or snippet per line

available feedback modes JShell comes with four built-in feedback modes, listed in the table below

Tab completion works for commands, command parameters, variables, methods, classes and interfaces

If a snippet throws an exception, jshell prints the exception together with the snippet id that caused the exception

In order to be able to access modules that are not part of the JDK, the module path must be set according to the

In order to be able to access classes in libs or class files that are not part of the JDK, the classpath must be set

Inside methods, classes and interfaces, statements have to end with a semicolon

On startup, jshell imports a bunch of Java packages by default.

Variables can be explicitly declared.

history jshell maintains a history that includes all previously entered commands and snippets

jshell accepts the following JLS syntax: Statements Expressions Variable, Method, Class and Interface

securing Payara Micro’s HTTP port with TLS (Transport Layer Security)

overview of the Payara Micro jar structure and options for unpacking the jar when running Payara Micro

setting up JPA with Payara Micro for access to a PostgreSQL Database

The jshell is a great tool for exploring libraries, testing new features of Java and for explorative programming in general.

setting the context root in configuration files and on the shell when running Payara Micro