Java 9 and Java 10
Let us explore Java 9 esimene
Ülevaade
Java 9 is now available for use. Like with any major software release, it has many new features, enhancements and deprecation. Note that this will be the last major release in the line of the old style of Java release. From 2018, Java releases will be available twice in a year, every 6 months. While there are many new features, the most notable ones have been modularity and the read-eval-print loop (REPL) tool. Availability of modularity allows software developers to divide source code into logical modules, define dependencies across modules and combine required modules at run time to develop software applications. The modularity is, however, not without controversies with Java vendors divided on its effectiveness. The read-eval-print loop (REPL) tool provides feedback to software developers on the code quality or acceptance by just evaluating some declarative statements and expressions. This feature is expected to save time and improve productivity. Kõige olulisem tarvikute koostaja parandusi,,en,Uus funktsioon,,en,nimetatakse ees-of-time,,en,võib parandada koostamise kiirust,,en,Pange tähele, et see funktsioon on veel katsejärgus,,en,Nagu juba mainitud,,en,seal on palju muid funktsioone,,en,lisaseadmeid ja deprecations,,en,Et rohkem teada saada Java,,en,loe edasi,,en,Anda arusaamist,,en,see artikkel on jagatud kolme ossa,,en,Uued omadused,,en,Uued omadused,,en,Siin me arutada umbes uusi funktsioone,,en,modulaarsusega,,en,Arvatakse, et kõige olulisem funktsioon selles versioonis,,en,Modulaarsusega aitab teil jagada JDK loogilisteks moodulid,,en,kui teil tekib programmi,,en,Võite kombineerida moodulid moodustavad ühe programmi,,en,Saate selgelt määratleda sõltuvused ja muud koostoimed kogu moodulid,,en. A new feature, called ahead-of-time (AOT) compilation, can improve compilation speed. Note that the feature is still in the experimental phase. As already mentioned, there are many other features, enhancements and deprecations. To know more about Java 9, read on. To provide ease of understanding, this article is divided into three sections: New features, enhancements and deprecations.
New Features: Here we will discuss about new features.
· Modularity
It is believed to be the most important feature in this release. Modularity helps you to divide the JDK into logical modules. Later, when you run the program, you can combine the modules to constitute one program. You can clearly define the dependencies and other interactions across modules. Modularity is expected to bring many benefits which include scaling the application up and down based on clients such as mobile devices, better security and performance and maintainability of libraries and large applications for both Java SE (Standard Edition) and Java EE (Enterprise Edition). To implement modularity, many changes have been done which include restructuring of the JDK and Java Runtime Environment (JRE) images and providing access to the JavaFX UI controls and CSS APIs.
If you need to migrate to the modularized Java 9, Oracle allows illegal reflective access from code on the class path by default in JDK 9. However, this facility will be discontinued from the next release.
· AOT
Though this can improve compiler performance which should be counted as an enhancement, AoT is a new feature. Note that it is still in the experimental phase. We know that the source code need to be compiled before the software program starts to work and Java offers the Just-in-Time (JIT) compilers for that. However, Java programs have become too large even for the JIT compilers to start them fast. Tulemusena, some Java methods are left uncompiled. The AoT can improve startup performance by compiling Java classes into native before launching into the virtual machine.
· REPL
The REPL helps software developers improve productivity by providing interim feedback on declarative statements and expressions. Developers can feed declarative statements and expressions after writing them partially and get feedback. Rather than having to address many errors after writing long lines of code, the developers can now address issues in the interim.
· JVM tõlkija Interface,,en,JVMCI,,sk,JVMCI,,en,on liides, mis võimaldab Java Virtual Machine,,en,juurdepääsu ja kasutamise koostajad kirjutatud Java dünaamiliselt,,en,JVMCI annab API, mis pakub võimalusi JVM juurdepääsu VM struktuur,,en,paigaldada kompileeritud koodi ja ühendage kompilaator JVM koostamise süsteem,,en,sa pead tähele, et see funktsioon on veel katsejärgus,,en,täiustused,,en,Olgem kontrollida lisaseadmed,,en,Stream API,,en,Stream API võimaldab tarkvaraarendajad lisada meetodeid nii, et objektide voolu saab võtta ja langes tingimisi,,en,Käi Stream elemente ja luua voost null väärtusega ajal laiendades Java SE API komplekt, mis võib toimida stream allikatest,,en,Kood cache segmenti,,en (JVMCI)
The JVMCI, nagu nimigi ütleb, is an interface that allows the Java Virtual Machine (JVM) to access and use compilers written in Java dynamically. The JVMCI provides an API which provides ways to the JVM to access the VM structure, install compiled code and plug the compiler to the JVM compilation system. However, you need to note that this feature is still in the experimental phase.
Enhancements : Let us check enhancements
· Stream API
The Stream APIs allows software developers to add methods so that items from streams can be taken and dropped conditionally; iterate over Stream elements and create a stream from a null value at the time of expanding the Java SE API set which can act as stream sources.
· Code cache segments
Võite jagada kood vahemälu segmentideks parandada koodi jõudlust ja võimaldab laiendusi nagu peeneteraline kesklukustus,,en,Kood vahemällu segmendid võivad pakkuda paremaid tulemusi täiustunud pühkima korda jätmise tõttu meetod ja mitte-profileeritud koodi vahele ja eraldamine ja parema täitmise aeg mõned kriteeriumid,,en,Parem Unicode ja HTML,,en,toetus,,en,JDK toetab Unicode,,en,kodeeriva Standardi mis lisab,,en,kuue skriptid ja,,en,javadoc dokumentatsiooni tööriist saab nüüd luua HTML,,en,juurdehindlus,,en,Täiustatud andmete turvalisuse,,en,lisab API kasutamise Datagram Transport Layer Security,,en,DTLS,,da,See tähendab paremaid turvalisus vältida pealtkuulamise,,en,võltsimise ja rikkumise sõnumeid kasutatakse kliendi -server side,,en,Parandamiseks on saadaval nii kliendi ja serveri otsad,,en,HTTP upgrade,,en,saab nüüd toetada suurema versiooni HTTP protokolli,,en. Code caching segments can offer better results in the form of improved sweep times due to non-method and non-profiled code skipping and separation and improved execution time for some benchmarks.
· Improved Unicode and HTML 5 support
The JDK supports the Unicode 8.0 encoding standard which adds 8000 characters, six scripts and 10 plokid. Also, the Javadoc documentation tool can now generate HTML 5 markup.
· Improved data security
Java 9 adds an API for using the Datagram Transport Layer Security (DTLS). This means improved security to prevent eavesdropping, forgery and tampering of messages used in client -server communications. The enhancement is available for both client and server ends.
· HTTP upgrade
Java 9 can now support the higher version of HTTP protocol, the HTTP/2 client. Java 9 can upgrade to the protocol with an API. Note that the HTTP/2 protocol is in the beta stage. Java 9 can support the Web socket with the API as well. Now you can stop using the problematic HttpURLConnection API or the HTTP/1 protocol which is too complex to use.
· Improved JavaScript embedding
JavaScript embedding in Java applications in the form of a runtime and lightweight JavaScript was available from Java 8. The responsibility of embedding was given to Project Nashorn. In Java 9, some improvements have been made to Project Nashorn. JDK 9 comprises a parser API aimed at the ECMAScript syntax tree of Project Nashorn. With the help of the API, Integrated Development Environments (IDE) and server-side frameworks can perform ECMAScript analysis without depending on Project Nashorn’s internal implementation classes.
Deprecation: Exploring deprecated features
Java 9 no longer supports the following features.
· Applet API
With the browser makers removing support for Java browser plug-ins keeping security considerations in mind and the HTML 5 arriving, the Applet API is deprecated. As alternative, software developers are asked to use the Java Web start which is used to launch applications from a browser. With Applet API, the appletviewer tool is also deprecated.
· Concurrent Mark Sweep (CMS) Garbage Collector
Though CMS stands deprecated from Java 9, support to versions already using the feature will be discontinued in future releases. CMS on aegunud, et kiirendada arengut teiste prügi kollektsionäärid tööpunkti virtuaalmasina,,en,CMS asendatakse madala pausi G1 prügi koguja pikaajalise alusel,,en,Java Runtime Environment,,en,valiku funktsioon,,en,Võime valida JRE käivitamisel kaudu Mitu JRE,,en,Majra,,hi,funktsioon on lõpetatud, sest funktsioon on liiga keeruline,,en,puudub tervikliku dokumentatsiooni ja kasutatakse harva,,en,Funktsioon teinud rakendamine Java Launcher keeruline,,en,Alates funktsioone ja täiustusi,,en,suunas, kus Java liigub võib järeldada,,en,põhirõhk on kebjakalt ja ajakohaste korda,,en,AOT ja JVMCI eesmärk on teha koostamise kiiremaks ja tulemuslikkuse parandamiseks,,en,Modulaarsusega aita tarkvarafirmad korraldada oma tarkvara projekte paremini,,en. CMS will be replaced by the low-pause G1 garbage collector on a long-term basis.
· Java Runtime Environment (JRE) selection feature
The ability to select a JRE at runtime via the Multiple JRE (mJRE) feature is being discontinued because the feature is too complex, lacks comprehensive documentation and is seldom used. The feature made the implementation of the Java Launcher complicated.
Järeldus
From the features and enhancements, the direction at which Java is moving can be inferred. Ilmselt, the emphasis is on nimbleness and keeping up with the times. The AOT and the JVMCI are designed to make compilation faster and improve performance. Modularity is going to help software companies organize their software projects better. On ilmne rõhku veebitehnoloogiad,,en,eraldumine ei ole ilma vastuolusid,,en,Inimesed on jagatud efektiivsuse kohta selle iseärasusi,,en,Dmitri Leskov,,en,müügidirektor Java tehnoloogia müüja Excelsior,,en,arvab, et AOT funktsioon ei ole veel piisavalt küps proovinud turul,,en,Rohkem teavet Java,,en,leiate siit,,en,Jwa9,,hi,sissejuhatus,,en,Tulekul ... Java,,en,on ikka töö-in-progress riigi ja seega,,en,ei ole palju teada selle kohta,,en,Samuti ei ole kuupäeva, millal see rullima,,en,mõned olulised värskendused on saadaval, mis on toodud allpool,,en,Oracle on esitanud uue JDK Enhancement Ettepanek,,en,koguda ettepanekuid suunas lisaseadmed Java mis moodustavad Java,,en,Nagu iga viimaste teadete saadaval,,en,järgmised muudatused oodatakse,,en,Parandamine Lambda funktsionaalsus,,en,parem täpsustus,,en. However, Java 9 release is not without controversies. People are divided on the efficacy of its features. For example, Dmitry Leskov, marketing director at Java technology vendor Excelsior, thinks that the AOT feature is still not mature enough to be tried in the market.
More information on Java 9 can be found here Java9 ja Java SE 9 introduction
Coming soon…Java 10
Java 10 is still in the work-in-progress state and therefore, not much is known about it. Neither is the date when it will roll out. Still, some important updates are available which are given below.
Oracle has filed a new JDK Enhancement Proposal (JEP) to collect proposals towards enhancements of Java which will constitute the Java 10. As per the latest reports available, the following changes are expected.
- Improvement of the Lambda functionality.
- Better disambiguation.
- Kasutades rõhutavad kasutamata parameetrid,,en,Kuigi mainitud muudatused on seotud Lambda funktsionaalsus,,en,nad on sõltumatud funktsioonid,,en,Sel hetkel,,en,väljapakutud muudatused arutatakse ja võimalus ühe või mitu ettepanekut saada modifitseeritud või langenud, ei saa välistada,,en,Lühikirjeldus kavandatud muudatused on toodud allpool,,en,Lambda funktsiooni kuulus Java,,en,aastast,,en,mitmesugustel põhjustel,,en,tulemuslikkuse ei ootuspäraselt,,en,lambdas,,en,tundus,,en,segadusse tarkvara arendajad, kes olid uued see,,en,Arendajad arvates oleks masendav, kui kompilaator ei tunnistanud lambdas,,en,See probleem on eeldatavasti adresseeritud,,en,Rohkem teavet,,en,lambda leftovers,,en,Varem versioonid,,en.
Although the above changes are related to the Lambda functionality, they are independent functionalities. At this point, the proposed changes are being discussed and the possibility of one or more proposals getting modified or dropped cannot be ruled out.
A brief description of the proposed changes are given below.
Better disambiguation
Lambda functionality was included from Java 8 onwards. However, due to various reasons, the performance was not as expected. Lambdas, it seemed, would confuse software developers who were new to it. Developers would find it frustrating when the compiler failed to recognize Lambdas. This problem is expected to be addressed.
More information on Lambda Leftovers
Kasutades rõhutavad kasutamata parameetrid,,en,Kuigi mainitud muudatused on seotud Lambda funktsionaalsus,,en,nad on sõltumatud funktsioonid,,en,Sel hetkel,,en,väljapakutud muudatused arutatakse ja võimalus ühe või mitu ettepanekut saada modifitseeritud või langenud, ei saa välistada,,en,Lühikirjeldus kavandatud muudatused on toodud allpool,,en,Lambda funktsiooni kuulus Java,,en,aastast,,en,mitmesugustel põhjustel,,en,tulemuslikkuse ei ootuspäraselt,,en,lambdas,,en,tundus,,en,segadusse tarkvara arendajad, kes olid uued see,,en,Arendajad arvates oleks masendav, kui kompilaator ei tunnistanud lambdas,,en,See probleem on eeldatavasti adresseeritud,,en,Rohkem teavet,,en,lambda leftovers,,en,Varem versioonid,,en
In the past versions, Lambdas kujutaksid ennast palju erinevaid parameetreid kuigi tarkvara arendaja ei pea kõiki neid parameetreid ajahetkel,,en,arendaja oleks vaja eristada kasutamata parameetrid,,en,Allkriipsud aitab eristada kasutamata parameetrid,,en,Leiad rohkem infot siit,,en,Hoiame seda lehte uuendatakse / lisada uusi postitusi Java,,en,ja tulevaste versioonide / funktsioonid,,en,Pidage järgmised,,en. So, the developer would need to distinguish unused parameters. Underscores will help distinguishing the unused parameters.
You can find more information here http://openjdk.java.net/projects/jdk/10/
Note: We will keep this page updated/add new posts on Java 10 and upcoming versions/features. Please keep following.
