Oracle Java Magazine: September/October 2018 - 程序员必读

java

magazine

需积分: 7 174 浏览量更新于2024-07-17 收藏 20.83MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

"Oracle Java Magazine September/October 2018" 这期《Oracle Java Magazine》是面向Java开发人员的专业杂志，旨在提供最新的Java技术和行业动态。以下是一些关键知识点： 1. **设计模式**： - **评论作为设计元素**（COMMENTS AS DESIGN ELEMENTS）：文章探讨了如何将用户评论集成到软件设计中，以提高用户体验和产品互动性。 - **访问者设计模式**（VISITOR DESIGN PATTERN）：深入讲解了访问者模式，这是一种行为设计模式，允许在运行时对对象结构执行操作，而无需修改该结构。 2. **GraalVM：编译为原生二进制**（COMPILING TO NATIVE BINARIES）： GraalVM是一个高性能的运行时环境，支持多种语言，包括Java。它能将Java代码编译为原生二进制，从而实现更快的启动时间和更好的性能。 3. **Jakarta EE：新的企业级Java**（JAKARTA EE: THE NEW ENTERPRISE JAVA）：文章讨论了Jakarta EE（以前称为Java EE）的最新进展，这是一个用于构建企业级应用程序的开放标准框架。 4. **使用Netflix Hystrix创建可靠的微服务**（CREATING RELIABLE MICROSERVICES EASILY WITH NETFLIX HYSTRIX）： Netflix Hystrix是一个库，用于实现断路器模式，帮助创建容错的微服务架构，以防止级联故障并提高系统的整体弹性。 5. **Java on ARM：轻松移植到基于ARM的服务器**（JAVA ON ARM: EASY PORTING TO ARM-BASED SERVERS）：这篇文章介绍了如何将Java应用程序迁移到基于ARM架构的服务器上，ARM处理器在低功耗设备和云计算领域越来越受欢迎。 6. **开发中的生产力瓶颈**：数据显示，大约41.1%的开发者认为等待他人是主要的生产力瓶颈，而35.1%的人认为工具限制了他们的效率。这引发了关于质量和性能与安全之间权衡的讨论。 7. **优化Java开发的五大最佳实践**（TOP 5 BEST PRACTICES FOR STREAMLINING JAVADEVELOPMENT）：提供了提高Java开发效率的实用建议，可能包括代码重构、自动化测试、持续集成/持续部署（CI/CD）等方法。这期杂志还提供了Oracle公司活动的信息，如参加展会、下载电子书等，鼓励开发者保持与时俱进，掌握最新的Java最佳实践，以满足发布期限、产品需求和预算要求。

资源详情

资源推荐

//user groups/

ORACLE.COM/JAVAMAGAZINE /////////////////////////////// SEPTEMBER/OCTOBER 2018

ISTANBUL JUG

The Istanbul Java User Group,

JUG Istanbul, was founded

in March 2006. Since then,

the community has been

organizing monthly meetups

as well as an annual confer-

ence called Java Day Istanbul,

in which Java Champions,

JUG leaders, and develop-

ers from around the world

participate. This year’s

conference took place in Istanbul in May 2018 at the Hilton

Bosphorus Istanbul and included trending topics such as eec-

tive Java, microservices, serverless architectures, DevOps, and

Java EE microprole.

The community created a green-eld open source project

named Second Opinion Doctor, a crowd-sourcing platform for

medical professionals. The project began in November 2017

with a co-op hackathon. The project is still ongoing, and other

open source communities have been participating in it. JUG

Istanbul joined the Eclipse Foundation in May 2018.

Today, more than 3,000 JUG members participate in

Turkey’s Java community. For communication outside meet-

ings, JUG Istanbul uses Facebook, Twitter (@jug_istanbul),

Slack (jugistanbul.slack.com), and meetups. Email JUG

Istanbul in advance if you are a member of another JUG, a Java

Champion, or a technology evangelist coming to Turkey so that

the group can host you and arrange some conversations.

Join the World’s

Largest Developer

Community

ORACLE DEVELOPER COMMUNITY developer.oracle.com

Membership Is Free | Follow Us on Social:

@OracleDevs facebook.com/OracleDevs

Download the latest software, tools,

and developer templates

Get exclusive access to hands-on

trainings and workshops

Grow your network with the Developer

Champion and Oracle ACE Programs

Publish your technical articles—and

get paid to share your expertise

ORACLE.COM/JAVAMAGAZINE /////////////////////////////// SEPTEMBER/OCTOBER 2018

//the leading edge/

GraalVM is open source and largely written in Java, so to get acquainted with the project

you don’t need to be an expert in the native code. This aspect also means that you can use the

tooling you use for everyday Java development to explore and develop GraalVM. Now, let’s look

briey at some GraalVM components.

Graal, the JIT compiler. Without an outstanding just-in-time (JIT) compiler, it’s really hard to

produce a high-performance virtual machine. So at the heart of GraalVM, you nd a compiler

called Graal. Graal can be used both as a JIT compiler and as a static, ahead-of-time compiler.

Just like the other components of GraalVM, Graal is written in Java. It implements several

typical compiler optimizations: common subexpression elimination, dead-code elimination,

constant folding, and so on. However, its inlining and escape analysis algorithms are where it

really shines. Graal is an aggressively optimizing compiler that uses an internal representa-

tion (IR) that bears resemblance to the program dependence graph the C2 compiler in the Java

HotSpot VM uses, although it diers in important ways. During the compilation, the IR is trans-

formed from representing high-level operations (such as load Java eld) to low-level operations

(for example, read at address+oset). This low-level representation is eventually translated into

the machine code. In addition to standard JVM options that can assist you with analyzing the JIT

compilation (such as -XX:+PrintCompilation, XX:+PrintAssembly, and so on), the GraalVM distri-

bution includes a utility called the Ideal Graph Visualizer, which you can use to debug and ana-

lyze these graph transformations.

True. The next major component of the GraalVM project is True, which is a framework for

implementing programming languages. True oers an API that you can use to implement

an interpreter of a language based on the abstract syntax trees (ASTs) of the source programs.

Evaluating ASTs is a relatively straightforward way to execute a program, so working on an

interpreter is much easier than creating an optimizing compiler. But True, with the help of

the Graal compiler, can optimize these interpreters so their peak performance is on par and

sometimes better than the code produced by conventional compilers.

To compile the interpreters for the implemented language, True uses a technique called

partial evaluation. In a nutshell, this means True takes a language interpreter and a program,

剩余91页未读，继续阅读

蛤十一

粉丝: 6
资源: 36

Oracle Java Magazine: September/October 2018 - 程序员必读

Java Magazine JanFeb 2018.pdf

java每月新闻杂志7

Java Magazine MarchApril 2019.pdf

帮我优化 这段代码 for (int i = 0; i < ransomNote.length(); i++) { String s = ransomNote.substring(i,i+1); if (magazine.contains(s)) { magazine = magazine.replaceFirst(s, ""); } else { return false; } flag = true; }

提供机器人系统需要在可扩展性和异构性之间权衡的参考文献（近年的）给出引用格式

为Linux设计一个简单的二级文件系统的参考文献

给我推荐一些语音识别方面的参考文献

道路场景语音分割相关的文献和代码能给我些吗

基于Matlab的遥感数据分析的相关文献

生成8篇有关5G网络技术的参考文献

基于数据的强化学习相关资料链接

给你两个字符串：ransomNote 和 magazine ，判断 ransomNote 能不能由 magazine 里面的字符构成。 如果可以，返回 true ；否则返回 false 。 magazine 中的每个字符只能在 ransomNote 中使用一次。 java实现，怎么解

java网站开发的期刊

temp = magazine.charAt(i) - 'a';这段代码中的-'a'是什么意思

springboot外文文献

请问如何利用django在同一页面实现多张表的展示和查询

130个值得收藏的网站

pi/4DBPSK调制和解调文献

最新资源

帮我优化这段代码 for (int i = 0; i < ransomNote.length(); i++) { String s = ransomNote.substring(i,i+1); if (magazine.contains(s)) { magazine = magazine.replaceFirst(s, ""); } else { return false; } flag = true; }

给你两个字符串：ransomNote 和 magazine ，判断 ransomNote 能不能由 magazine 里面的字符构成。如果可以，返回 true ；否则返回 false 。 magazine 中的每个字符只能在 ransomNote 中使用一次。 java实现，怎么解