Records et Pattern Matching Pour Instanceof Finalisés Dans JDK 16

Les versions finales des records et le nouveau pattern matching pour instanceof sont prévues pour JDK 16. Avec ces nouvelles fonctionnalités, le code boilerplate peut être réduit et le code devient moins sujet aux erreurs.

Les deux fonctionnalités étaient déjà disponibles en preview dans le JDK 14 et 15. Elles sont légèrement améliorées et devraient être disponibles dans le JDK 16 dont la sortie est prévue pour mars 2021. Si tout se passe comme prévu, alors les nouvelles fonctionnalités seront disponibles dans le JDK 17, la prochaine version LTS, attendue en septembre 2021.

Les records sont la version Java des tuples nommés - essentiellement des conteneurs pour une séquence ordonnée d’éléments. Lors de l’utilisation de records, il n’est plus possible de découpler l’API et la représentation - les deux sont dérivés de la déclaration du record.

#java #jdk #développement #actualités

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Records et Pattern Matching Pour Instanceof Finalisés Dans JDK 16

Les versions finales des records et le nouveau pattern matching pour instanceof sont prévues pour JDK 16. Avec ces nouvelles fonctionnalités, le code boilerplate peut être réduit et le code devient moins sujet aux erreurs.

Les deux fonctionnalités étaient déjà disponibles en preview dans le JDK 14 et 15. Elles sont légèrement améliorées et devraient être disponibles dans le JDK 16 dont la sortie est prévue pour mars 2021. Si tout se passe comme prévu, alors les nouvelles fonctionnalités seront disponibles dans le JDK 17, la prochaine version LTS, attendue en septembre 2021.

Les records sont la version Java des tuples nommés - essentiellement des conteneurs pour une séquence ordonnée d’éléments. Lors de l’utilisation de records, il n’est plus possible de découpler l’API et la représentation - les deux sont dérivés de la déclaration du record.

#java #jdk #développement #actualités

67 New Features in JDK 16

Explore what Java 16 has to offer.

How time flies! Even in these extraordinary times, it seems hard to believe another six months have passed, and we now have a new release of the JDK. As usual, I will summarise all the new features with some commentary on their potential impact on Java application development.

Not all releases are created equal and, depending on how feature development phases align; some will have more features than others. JDK 16 contains quite a few new things, although several of them are continuations or finalization of incubator modules or preview features from earlier releases. I think this is one of the biggest benefits of the faster release cadence. Providing new functionality without making it part of the standard, gathering feedback from developers, and potentially making changes has delivered an improved process for the JDK development.

I’ll take my usual approach of dividing the post into language changes, library additions, JVM-related updates and, finally, anything else.

#java #records #java 16 #jdk 16 #sealed classes #67 new features in jdk 16

Records and Pattern Matching for Instanceof Finalized in JDK 16

Final releases of records and the new pattern matching functionality for instanceof are planned for JDK 16. With these new features, boilerplate code can be reduced and code becomes less error-prone.

Both features were already available as a preview in JDK 14 and 15. They are slightly improved and should be available in JDK 16 whose release is planned for March 2021. If all goes to plan then the new features will be available in JDK 17, the next long term support version, expected in September 2021.

Records

Records are the Java version of named tuples - basically containers for an ordered sequence of elements. When using records, it’s no longer possible to decouple the API and the representation - both are derived from the record declaration.

#java #jdk #development

Going Beyond Java 8: Pattern Matching for instanceof

A developer and Java expert gives an overview of the instanceof operator in the recent versions of Java and how it can be used to improve your code.

Introduction

According to some surveys, like JetBrains’s great survey, Java 8 is currently the most used Java version, despite being a 2014 release.

This article is the first in a series of articles titled, “Going Beyond Java 8,” inspired by the contents of my book “Java for Aliens.” These articles will guide the reader step-by-step to explore the most important features introduced starting with Java 9. The aim is to make the reader aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will look at an interesting novelty introduced in Java 14 as a preview feature (see related article). This is the first part of a complex feature known as pattern matching. It will affect various programming constructs in the future, for now, though, pattern matching is only available for use with the instanceof operator as a feature preview. This will radically change the way we use this operator.

#java #pattern matching #java 14 #instanceof

Builder Design Pattern

What is Builder Design Pattern ? Why we should care about it ?

Starting from **Creational Design Pattern, **so wikipedia says “creational design pattern are design pattern that deals with object creation mechanism, trying to create objects in manner that is suitable to the situation”.

The basic form of object creations could result in design problems and result in complex design problems, so to overcome this problem Creational Design Pattern somehow allows you to create the object.

Builder is one of the** Creational Design Pattern**.

When to consider the Builder Design Pattern ?

Builder is useful when you need to do lot of things to build an Object. Let’s imagine DOM (Document Object Model), so if we need to create the DOM, We could have to do lot of things, appending plenty of nodes and attaching attributes to them. We could also imagine about the huge XML Object creation where we will have to do lot of work to create the Object. A Factory is used basically when we could create the entire object in one shot.

As **Joshua Bloch (**He led the Design of the many library Java Collections Framework and many more) – “Builder Pattern is good choice when designing the class whose constructor or static factories would have more than handful of parameters”

#java #builder #builder pattern #creational design pattern #design pattern #factory pattern #java design pattern