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1Z0-809 exam Dumps Source : Java SE 8 Programmer II

Test Code : 1Z0-809
Test name : Java SE 8 Programmer II
Vendor name : Oracle
: 156 existent Questions

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Oracle Java SE 8 Programmer

Oracle says Java SE 8 clients will not fetch hold of public updates after January 2019 | killexams.com existent Questions and Pass4sure dumps

utility significant Oracle has introduced that Java SE eight enterprise users will no longer acquire public updates for the software after January next 12 months.

smartly, unless they fetch a industrial license, that is.

As for buyers, those the usage of Java for particular person, very own use, will continue to stand the identical entry to Oracle Java SE 8 updates as they sequel these days through as a minimum the stop of 2020.

"In most instances, the Java-primarily based purposes you speed are licensed separately through a company apart from Oracle (for instance, video games you play on your notebook are seemingly developed by a gaming company)," the difficult introduced in a press release.

"These applications can likewise speed on the Java platform and subsist based on Oracle Java SE 8 updates past 2020. therefore, Oracle recommends you contact your software issuer for details on how they design to proceed to supply application champion to you."

The enterprise announced the information alongside its newest crucial patch safety supplant for April, the residence it addressed a complete of 254 security vulnerabilities throughout a bunch of its products.

one of the vital extra brilliant patches within the update is a fix for the by no means-ending Spectre-connected vulnerabilities in Solaris systems, named CVE-2017-5753, or often known as Spectre variant 1.

while Oracle observed it has already mitigated most of the Spectre/Meltdown processor design bugs in its products lower back in January, this new one adds some further fixes for Solaris types 10 and 11.three.

Java peculiarly was patched for 14 CVE-listed vulnerabilities, including 12 that had been remotely exploitable with out person notification. Three of the issues, CVE-2018-2825, CVE-2018-2826, and CVE-2018-2814 stand been observed to stand allowed Applet or Java internet birth apps to both crash or win over Java SE.

The application enterprise advises checking your system and setting up the updates ASAP to obtain unavoidable any products are running on the newest versions and therefore as safe from the palms of those pesky cyber criminals as feasible. µ

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guidance information for Oracle 1Z0-804 Java SE 7 Programmer examination | killexams.com existent Questions and Pass4sure dumps

also called Java SE 7 Programmer II, Oracle 1Z0-804 is a certification exam that incorporates every bit of capabilities and information required to drudgery with Java. This check is a compund of numerous practising-based mostly initiatives, efficiency assignments, and much more. it's a proof that the individualis skilled ample to commemorate his or her advantage and expertise in any district that uses Java.

Oracle 1Z0-804 is a certification examination that the studentsneed to tide with a purpose to study the particulars of working with Java and boost their programming capabilities. The Oracle test covers any of the fundamental details of theJava programming language, that are object-oriented. you will gain information of the primary steps for developing basic programs with Java technology, Java-linked APIs, and everything you could exigency for designing functions.

exam particulars

Java SE 7 Programmer II covers a number of distinguished topics along with exercises, quizzes, and drill assessments that assist in clearing the exam readily. here is an inventory of some aspects you should comprehend about the test before figuring out to register for it:

  • The candidates exigency to reply sixty five questions in complete.
  • The questions protected within the examination belong to a multiple-option layout.
  • the total length of the commemorate at various is a hundred and fifty minutes.
  • The passing imprint that is required to fetch the credential is 65%.
  • This certification test includes here subject matters:

  • Java classification Design
  • Concurrency
  • constructing of Database software together with JDBC
  • Object-Oriented Design principles
  • Java File I/O
  • String Processing
  • Java I/O Fundamentals
  • Assertions and Exceptions
  • Localization
  • advanced class Design
  • Threads
  • OCPJP 7 brief Overview
  • Generics and Collections
  • The certification program helps in studying numerous facets related to Java, akin to administration and controlling of thread lifecycle, utilization of parallel networks, File courses, reading and writing statistics, using sling and an identical statements, the exhaust of wrapper classes, the exhaust of statics and other remaining key phrases, and an abominable lot greater. The examination is split into two ingredients, specifically Java SE 7 Programmer I and II. Passing each of them will weigh in you can acquire the credential and become a existent skilled.

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    Java SE 8 Programmer II

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    Java SE 8 for the Really Impatient: Programming with Lambdas | killexams.com existent questions and Pass4sure dumps

    This chapter shows how to create your own Java libraries that obtain exhaust of lambda expressions and functional interfaces.

    This chapter is from the reserve 

    In the first two chapters, you saw the basic syntax and semantics of lambda expressions as well as the stream API that makes extensive exhaust of them. In this chapter, you will learn how to create your own libraries that obtain exhaust of lambda expressions and functional interfaces.

    The key points of this chapter are:

  • The main intuition for using a lambda expression is to postpone the execution of the code until an preempt time.
  • When a lambda expression is executed, obtain sure to provide any required data as inputs.
  • Choose one of the existing functional interfaces if you can.
  • It is often useful to write methods that recrudesce an instance of a functional interface.
  • When you drudgery with transformations, respect how you can compose them.
  • To compose transformations lazily, you exigency to withhold a list of any pending transformations and apply them in the end.
  • If you exigency to apply a lambda many times, you often stand a chance to split up the drudgery into subtasks that execute concurrently.
  • Think what should befall when you drudgery with a lambda expression that throws an exception.
  • When working with generic functional interfaces, exhaust ? super wildcards for argument types, ? extends wildcards for recrudesce types.
  • When working with generic types that can subsist transformed by functions, respect supplying map and flatMap.
  • The point of any lambdas is deferred execution. After all, if you wanted to execute some code birthright now, you’d sequel that, without wrapping it inside a lambda. There are many reasons for executing code later, such as

  • Running the code in a divide thread
  • Running the code multiple times
  • Running the code at the birthright point in an algorithm (for example, the comparison operation in sorting)
  • Running the code when something happens (a button was clicked, data has arrived, and so on)
  • Running the code only when necessary
  • It is a apt view to arbitrator through what you want to achieve when you set out programming with lambdas.

    Let us commemorate at a simple example. Suppose you log an event:

    logger.info("x: " + x + ", y: " + y);

    What happens if the log flush is set to suppress INFO messages? The message string is computed and passed to the info method, which then decides to sling it away. Wouldn’t it subsist nicer if the string concatenation only happened when necessary?

    Running code only when necessary is a exhaust case for lambdas. The measure idiom is to wrap the code in a no-arg lambda:

    () -> "x: " + x + ", y: " + y

    Now they exigency to write a fashion that

  • Accepts the lambda
  • Checks whether it should subsist called
  • Calls it when necessary
  • To accept the lambda, they exigency to pick (or, in rare cases, provide) a functional interface. They dispute the process of choosing an interface in more detail in Section 3.3, “Choosing a Functional Interface,” on page 50. Here, a apt election is a Supplier<String>. The following fashion provides sluggish logging:

    public static void info(Logger logger, Supplier<String> message) { if (logger.isLoggable(Level.INFO)) logger.info(message.get()); }

    We exhaust the isLoggable fashion of the Logger class to resolve whether INFO messages should subsist logged. If so, they invoke the lambda by calling its abstract method, which happens to subsist called get.

    Core Java, Volume II - Advanced Features, 11th Ed (Prentice Hall) | killexams.com existent questions and Pass4sure dumps

    This is written as a no-nonsense tutorial and reference for experienced programmers who want to write robust Java code for real-world applications, and this eleventh edition has been updated to reflect Java SE 9.  Author Cay S. Horstmann covers advanced user-interface programming and the enterprise features of the Java SE 9 platform. The reserve covers the most distinguished language and library features and shows how to build real-world applications with thoroughly tested examples.


    Author: Cay S. HorstmannPublisher: Prentice HallDate: September 2018Pages: 1040ISBN: 978-0135166314Print: 0135166314Audience: Java DevelopersLevel: AdvancedCategory: Java 


    Related Reviews

    Core Java, Volume II Advanced Features 9th Ed

    For recommendations of Java books espy Java Books For Beginners,  Java Books For Going Further and Advanced Java - Books Outside the Core in our Programmer's Bookshelf section.

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    JavaOne 2013 Roundup: Java 8 is Revolutionary, Java is back | killexams.com existent questions and Pass4sure dumps

    JavaOne 2013 was recently held in San Francisco, from September 22 to September 26. The festivities kicked off Sunday, with a Strategy Keynote by Oracle employees Peter Utzschneider, Nandini Ramani and Cameron Purdy.

    It was the 18th JavaOne conference, and the Java community shows no signs of slowing down. Utzschneider told the audience that Java is soundless the number-one evolution platform in the world and the number of JUGs has been increasing by 10% year-over-year.

    The Future of Java

    Ramani discussed the current state of Java and how there are several different SDKs for Java: Java SE 7, CDC 1.1 (based on SE 1.4.2), CLDC (based on SE 1.3) and Java ME, just to name a few. In the past, these implementations served their specific perpendicular markets very well, but each implementation has diverged and become more and more siloed over the years. With Java 8, there will subsist a compact profile that replaces CDC.

    The APIs between ME and SE will subsist similar, and the language will champion any features in both. Java 8 will bring platform unification: code portability, commonality of APIs, common tooling - from SE embedded to server-side evolution with Java EE. In the future, there will just subsist one sort of Java developer.

    Other cornerstones in platform strategy include: synchronizing releases (Java 8 Early Access is available now) and working with partners (ARM, Freescale, Qualcomm) to obtain Java a first-class citizen in chipsets. In August, Oracle launched Java Platform Integrator Program to easily port and extend Java Embedded.

    Java EE 7 shipped eventual summer, which is a gigantic milestone considering that it's been talked about at the eventual two JavaOne conferences. Purdy mentioned three areas stand been emphasized in EE 7: developer productivity, meeting enterprise demands and HTML5.

    Two years ago, when Java EE 7 was announced, the major theme was cloud. Now EE 7 has many ease-of-use features for cloud deployments, including security enhancements, default resources, schema generation, a client API for RESTful services and JSF skinning for multi-tenant applications. Lastly, Cameron announced Project Avatar is now open source. Avatar is similar to Node.js, but runs on the JVM.

    Java 8 Is Revolutionary, Java Is Back

    The gigantic talk of the conference was Java 8, exemplified by imprint Reinhold in his Technical Keynote. Java 8 contains many new features, including a new Date and Time API ( JSR 310), Nashorn JavaScript Engine, sort Annotations ( JSR 308), Compact Profiles and Project Lambda (JSR 335).

    Lambda is the separate largest upgrade to the programming model. Ever. It's larger even than Generics. It's the first time since the birth of Java that we've done a carefully coordinated co-evolution of the virtual machine, the language and the libraries, any together. Yet the result soundless feels like Java. -- imprint Reinhold

    Brian Goetz, Java Language Architect at Oracle, went on to prove how lambdas can remove a lot of the boilerplate just to picture simple ideas. Before lambdas, developers often used a impecunious "beef to bun ratio" to express ideas, often with inner classes. Goetz showed the following example:

    Collection<Person> people = …; Iterator<Person> ip = people.iterator(); while (ip.hasNext()) { Person p = ip.next(); if (p.getAge() > 18) { ip.remove(); } }

    To abstract this idea, developers can rewrite the test into a predicate and write it as follows:

    Collections.removeAll(people, new Predicate<Person>() { public boolean test(Person p) { recrudesce p.getAge() > 18; } });

    With lambdas, it's much simpler:

    Collections.removeAll(people, p -> p.getAge() > 18);

    Not only are lambdas a nicer syntax, they uses invokedynamic to result in more compact bytecode that is more performant. As proof that the language and its APIs stand improved, Goetz talked about the new stream API and how you can exhaust it to sequel bulk operations on collections. For example:

    int highestWeight = people.stream() .filter(p -> p.getGender() == MALE) .mapToInt(p -> p.getWeight()) .max();

    This provides syntax, performance and abstraction, and you likewise fetch parallelism. Java 7 added a new Fork/Join framework for decomposition, but its API soundless made it hard. With Java 8, you merely stand to obtain a one-line change, changing stream() to parallelStream():

    int highestWeight = people.parallelStream() .filter(p -> p.getGender() == MALE) .mapToInt(p -> p.getWeight()) .max();

    To learn more about Project Lambda, espy http://openjdk.java.net/projects/lambda or download Java 8.

    NetBeans 7.4

    John Ceccarelli, NetBeans Engineering Director, gave a Chess Game demo of editing an HTML5 application (written in Knockout.js). He demonstrated how it was workable to tweak properties in NetBeans (similar to how you'd sequel it in Firebug or Chrome Developer Tools) and stand those instantly subsist reflected in your browser without reloading. It looks very similar to IntelliJ IDEA's LiveEdit plugin.

    Last year, NetBeans introduced Project Easel, which was designed to add advanced HTML5 champion to NetBeans. Ceccarelli mentioned the community's reaction was "Hey, that's great, but they want it in their EE projects." The apt tidings is NetBeans 7.4 RC1 was released birthright before JavaOne, and it includes champion for HTML5, Java EE, Java Web and Maven Web projects.

    In addition to live editing of HTML and CSS, NetBeans 7.4 includes JavaScript framework champion for Angular, jQuery and Knockout.js. This means the code editor is conscious of any your DOM ids, as well as model names in your JavaScript. NetBeans 7.4 is any about mobile web and mobile hybrid (via Cordova 3.0 support). It's exciting how its live edit feature can subsist used on mobile devices in addition to desktop browsers. The latest release candidate can subsist downloaded from netbeans.org.

    The Chess Server for the aforementioned demo was written using Java EE 7 and deployed on GlassFish 4. The application has five distinct modules: Chess Endpoint, Player Registration, Chess Engine, Chess Game Manager and Persistence Manager.

    The Chess Server uses many new Java EE technologies, including: WebSockets, Batch, EJB, JPA, JAX-RS 2.0. any the communication between the client and the server is done via JSON. Santiago Pericas-Geertsen, a member of the GlassFish team, showed some code illustrating how effortless it is to setup a WebSocket endpoint with Java EE 7:

    @ServerEndpoint(value = "/chessserver", encoders = MessageEncoder.class, decoders = MessageDecoder.class); public class ChessServerEndpoint { @Inject private GameCatalog catalog; @OnMessage public Message onMessage(String message, Session session) { recrudesce message.processMe(this); } ... }

    The client API to talk to this endpoint is pretty similar and looks effortless to implement.

    The final technical innovation on parade in Oracle's Technical Keynote was the DukePad. The DukePad, is a do-it-yourself, make-at-home tablet computer based on the Raspberry Pi and JavaSE 8 Embedded. They create that CPU performance isn't great: the Raspberry Pi CPU is almost as swiftly as a Pentium II, 14 times slower than a Samsung Galaxy S4 and 94-100 times slower than an Intel Core i7 processor. However, the GPU is pretty good, 400 times faster than the Pentium II had in 1996.

    OpenJFX has had most of its components open sourced, including iOS and Android prototypes. The presenters mentioned its forums are hardy and they've received a lot of bug reports from users. They've likewise received a objective amount of community contributions. JavaFX is included in JavaSE 8.

    For Java 9 and beyond, Oracle has a number of initiatives. The main ones are Java on GPUs, Reification (getting rid of erasure in Generics), JNI 2.0, Memory-Efficient Data Structures and pile a modular platform with Jigsaw.

    The Java Community

    The Java Community Keynote was kicked off by Donald Smith, Senior Director of Product Management at Oracle. He brought many different folks on stage to talk about inspiring stop user cases of Java technology.

    Tori Wieldt, talked about the Raspberry Pi Challenge and how there were 25 developers who participated and seven projects completed. Heart of Glass (monitoring heart rate in existent time with Google Glass) and MTAAS (Monster Truck as a Service) were two of the successful projects that emerged from this event. It was likewise announced that Oracle has signed an OEM agreement with the Raspberry Pi Foundation. They're going to start including Java SE with some of their images, so Java will subsist included out-of-the-box!

    Other notable announcements in the community keynote include: Square has become a member of OpenJDK and Devoxx4Kids is looking for JUG leaders and parents to host workshops in their own cities. Of course, Aditya Gupta's demo of how to subsist a Minecraft hacker was one of the highlights. It was likewise one of the first Eclipse demos used in keynote presentations. He made pigs cruise and explosions create more explosions, learning most of it with capitalize from his dad, Arun Gupta, and Minecraft Forge.

    Oracle Academy got a mention from Alison Derbenwick Miller. It offers curriculums for K-12 students, as well as universities. It educated 2.5 million students eventual year and offers student workshops, teacher evolution and discounts on certifications.

    Following the education portion of the community keynote, many robot demos were on display. James Gosling even made a guest appearance to talk about the drudgery he's doing.

    Proof That Java Is Back

    The strategy and technical keynotes were instrumental in explaining why Java is back. Java 8 hopes obtain it fun to program in Java again (by reducing boilerplate code) and there are lots of APIs in Java EE 7 that should obtain it effortless to build modern applications. There's further proof in some recent articles:

    If you didn't fetch a chance to attend JavaOne this year, you might want to add it to your calendar for next year. If not for the technical content, sequel it for the networking. The Oracle appreciate Event was off the hook with free food, beer and music from Maroon 5 and the Black Keys. The parties are back, and the exhibition hall was overflowing.

    More than anything, the enthusiasm of the developer community seems to subsist as tenacious as ever.

    About the Author

    Matt Raible has been pile web applications for most of his adult life. He started tinkering with the web before Netscape 1.0 was even released. For over 15 years, Matt has helped companies adopt open source technologies (Spring, Hibernate, Apache, Struts, Grails, Bootstrap, jQuery) and exhaust them effectively. Matt authored Spring Live and Pro JSP. He is likewise the founder of AppFuse, a project which allows you to fetch started quickly with Java frameworks, as well as a committer on the Apache Roller and Apache Struts projects.He knows and Loves: HTML5, CSS, JavaScript, CoffeeScript, jQuery, AngularJS, Java, Spring, Scala, Play! Framework, Groovy, Grails, Tomcat, Jetty and PhoneGap.

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