Announcing SneakyThrow: A Java Library to ignore Checked Exceptions,Are you tired of writing 'catch-pseudo-code' for Java's Checked Exceptions? And let’s not think about that anno...

Java 10 — migration story,As you probably know Java 10 was recently released. Not so many new features. At least for Kotlin developers… But there are several improvements to JVM ...

var var = var().var.var(),var was introduced in Java10. It's interesting! jshell> Var var(){return new Var();} | created method var(), however, it cannot be referenced until cla...

Java - JVM Security Information Gathering, Overview Over the last ~5 years I’ve worked with quite a few different Hadoop clusters. During this time, Java has changed quite a bit s...

SpringBoot2 Blocking Web vs Reactive Web,Hello, I'm Mitz. This is the first post on dev.to. Nice to meet you :) Buzzwords into my ToolBox As many of you've heard Microservices, Blo...

Java 9 Flow API, Java 9 Flow API Flow API is Java's official support for Reactive Streams Specification. It is a combination of both Iterator(Pull) and Observer(Push) patterns. The...

Java Object Oriented Programing (OOP),What is OOP? Object-oriented programming (OOP) is a software programming model constructed around objects. This model compartmentalizes data i...

Types: When I use, when I don't., Introduction Below is my personal perspective :) If I write a one-page program, I don't mind having no types, zero types, -1 types, and I'm happy ...

Turn Your Spaghetti Code into Functions - Part 3,Orignally posted at www.gunnargissel.com Picking up where we left off in Part II, let's set the stage for using a validator. We lef...

The Road Not Taken? — Kotlin or Java, Photo by Jon Tyson on  Unsplash The first one-million dollar question that comes to every Android developer while starting a new projec ...

エポック秒から指定されたタイムゾーンの日付を取得する,エポック秒とタイムゾーンを指定して日付を取得する。 // 2017/10/01 00:00:00 のエポック秒 Instant instant = Instant.ofEpochSecond(...

文字列連結のパフォーマンス,Java本格入門で紹介されていた文字列連結を試す。1 10万回 1万回 5千回 千回 StringBuilder 7.4 0.7 0.5 0.1 String#concat 11.5 1.8 1.5 0.6 ＋演算子 3453.5 106....