Xanadu - Java Chapter Meeting
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The document summarizes new features and changes in Java 10 and previews Java 11. It discusses local variable type inference, improvements to the garbage collector interface, application class data sharing, an experimental Java-based JIT compiler using Graal and Truffle, and the removal of certain Java EE and CORBA modules and tools in Java 11.
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你可以在以下找到中文說明：
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Java 11 and Java 12 include new features that improve performance and developer productivity. Java 11 focuses on stability and is the long term support version, while Java 12 contains newer experimental features. Some key additions in Java 11 include lambda parameters, nested access control, and improved string handling. Java 12 features include switch expressions, class data sharing archives, and garbage collection improvements. While Java 12 contains the latest features, Java 11 is generally better for deployment in production environments due to its long term support and stability. Both versions aim to enhance the Java development experience.
What's new in Java 11
A quick introduction about everything that's new in Java 11. Includes API changes, language changes and new tools in the JDK.
Demo's for this presentation can be found here: https://github.com/MichelSchudel/java11demo
Java7
Java 7 introduced several new features including underscore in numeric literals to improve readability (e.g. 1_000), binary literals prefixed with "0b", string switching to allow string comparisons, diamond operator <> in collections to simplify generic type instantiation, improved exception handling with multi-catch functionality, automatic resource management with try-with-resources, and new NIO 2.0 APIs including file change notifications. Other enhancements included fork/join framework for parallel programming, dynamic language support improvements, and Swing component decorator JLayer. The presentation proposed upgrading an existing Etrali project to Java 7 for benefits such as improved performance and reduced code size.
Java 7 Whats New(), Whats Next() from Oredev
Java 7 was released in July 2011 with improvements to performance, concurrency, and memory management. Plans for Java 8 include modularity, lambda expressions, and date/time APIs. The Java Community Process is also being improved to increase transparency, participation, and agility through JSR 348. Overall, the Java ecosystem continues to grow with new languages on the JVM and an active community.
Project Coin
The document summarizes the key new features introduced in each version of Java from JDK 1.0 to Java SE 8. Some major enhancements included strings in switch statements in Java 7, binary and underscore literals, multi-catch exceptions, try-with-resources for automatic resource management, and lambda expressions in Java 8.
Scala is java8.next()
The document discusses Java 8 lambda expressions and how they improved Java by allowing for anonymous functions. It provides examples of code before and after Java 8 that demonstrate lambda expressions providing a clearer syntax compared to anonymous inner classes. Specifically, it shows how lambda expressions allowed sorting a list of strings in a more readable way. It also discusses how functions can be treated as data by being passed as parameters or returned from other functions.
Introduction of Java 8 with emphasis on Lambda Expressions and Streams
Lambda expressions and streams are major new features in Java 8. Lambda expressions allow treating functionality as a method argument or variable. Streams provide a new way to process collections of objects in a declarative way using intermediate and terminal operations. The document provides examples of lambda expressions, method references, functional interfaces, default methods on interfaces, and stream operations like filter, map, and reduce.
Java 8 New features
Java 8 introduced several new features to the language including lambda expressions, default methods in interfaces, and static methods in interfaces. It also improved existing areas such as collections, date/time handling, concurrency, and I/O. Significant under-the-hood changes included replacing PermGen with Metaspace for class metadata and enabling AES encryption on newer CPUs.
New features in Java 7
The document discusses new features in Java 7 including the ability to use strings in switch statements, catch multiple exceptions in a single catch block, improved generics with the diamond operator, underscore separators in long numbers, try-with-resources for automatic resource management, and new classes/interfaces in the collections API like Phaser and ThreadLocalRandom. It encourages visiting the listed blog for more information on Java 7 features.
Content Storage With Apache Jackrabbit
Jackrabbit is an open source content repository for Java that implements the JCR 2.0 specification. It provides a flexible, hierarchical content storage system with features like full text search, versioning, transactions, and observation. Jackrabbit entered the Apache incubator in 2004 and graduated in 2006. It provides APIs and implementations for embedding a content repository, accessing it remotely over RMI, or deploying it as a shared resource using a servlet container or J2EE application server. The document discusses Jackrabbit's architecture, configuration, indexing, data storage, content modeling, and common issues around content hierarchies and concurrent edits.
Scala Talk at FOSDEM 2009
The document discusses Scala, a programming language designed to be scalable. It can be used for both small and large programs. Scala combines object-oriented and functional programming. It interoperates seamlessly with Java but allows developers to add new constructs like actors through libraries. The Scala community is growing, with industrial adoption starting at companies like Twitter.
De Java 8 a Java 11 y 14
The document discusses changes in Java versions from Java 8 to Java 14. It covers major new features and improvements in each version including modules in Java 9, switch expressions in Java 12, and records in Java 14. It also discusses real world challenges with upgrading such as compatibility, multiple JVMs, library updates, and IDE support.
Java 8
Java 8 introduced new features like default methods, lambda expressions, and stream API. Default methods allow interfaces to provide implementation without breaking existing classes. Lambda expressions enable functional programming by allowing blocks of code to be treated as values. The stream API allows functional-style processing of data such as filtering, mapping, and reducing collections. Some limitations of streams include that they are not reusable, can have worse performance than loops, and are less familiar to procedural programmers.
Apache Karaf - Building OSGi applications on Apache Karaf - T Frank & A Grzesik
OSGi Community Event 2014
Abstract:
Experience level: Beginner
Apache Karaf is a small OSGi based runtime which provides a lightweight container onto which various components and applications can be deployed.
This session gives an overview over Apache Karaf, how to manage and configure Apache Karaf and how to use the comprehensive command shell that Karaf provides. By the example of a simple pet clinic application we will demonstrate how to build and deploy a web application on Apache Karaf. This talk will introduce the different deployment mechanisms available in Karaf and how to deploy bundles from the file system, command shell or via a maven repository. You will learn how to manage external dependencies via features, use the Karaf maven plugin to create features and build and configure persistence bundles for Apache Karaf. We will further give an overview, how to use Karaf in a cloud environment and how to use the Apache Cellar project to build up an Apache Karaf cluster.
Speaker Bios:
Torsten Frank
Torsten Frank is an entrepreneur and healthcare IT expert with international experience and a strong background in product and business development. He is CEO and founder of medisite, a company that delivers highly specialized healthcare IT solutions to their customers for more than 10 years. medisite is a winner of the Federal Ministry for Economic Affairs and Energy (BMWi) “Trusted Cloud” technology competition, geared toward secure cloud computing for SMEs and the public sector. Torsten Frank holds a medical degree from the Hannover Medical School, where he also has worked for several years as a physician at the Department of Cardiothoracic Surgery after completing his medical studies in Hannover, Germany and Chicago, USA.
Alexander Grzesik
Alexander is the head of development of medisite Systemhaus GmbH and responsible for the development of the the PaaS+ cloud platform the clinical information system m.life and software architect for the TRESOR Project.
He has 15 years of work experience in medical Software development as team leader and software architect.
Expert for Software Architecture, OSGi, Java and Java EE.
Alexander has been a speaker at several conferences including EclipseCon Europe and the OpenShift Community Day.
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artificial intelligence and data science contents.pptx
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Xanadu - Java Chapter Meeting
- 3. Java 10 compiler bug
- 4. JEP 286: Local-Variable Type Inference. var list = new ArrayList<String>(); // infers ArrayList<String> var stream = list.stream(); // infers Stream<String>
- 6. JEP 310: Application Class-Data Sharing. java -Xshare:dump -XX:+UseAppCDS -XX:SharedClassListFile=hello.lst -XX:SharedArchiveFile=hello.jsa -cp hello.jar java -Xshare:on -XX:+UseAppCDS -XX:SharedArchiveFile=hello.jsa -cp hello.jar HelloWorld
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- 16. Pitfalls ● Warmup time ● Memory consumption ● Old version on Java 9
- 18. JEP 318: Epsilon. An Arbitrarily Low-Overhead Garbage Collector
- 19. JEP 320: Remove the Java EE and CORBA Modules JEP 320 lists several modules and tools that it will remove. The to-be-removed modules include java.xml.ws, java.xml.ws.annotation, jdk.xml.ws, java.xml.bind, jdk.xml.bind, java.transaction, java.corba. The to-be-removed tools include wsgen, wsimport, schemagen, xjc, and servertool.