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Troubleshooting Java Performance
Troubleshoot the most widespread and pernicious Java performance problems using a set of open-source and freely-available tools that will make you dramatically more productive in finding the root causes of slow performance. This is a brief book that focuses on a small number of performance anti-patterns, and you’ll find that most problems you encounter fit into one of these anti-patterns. The book provides a specific method in a series of steps referred to as the “P.A.t.h. Checklist” that encompasses persistence, alien systems, threads, and heap management. These steps guide you through a troubleshooting process that is repeatable, that you can apply to any performance problem in a Java application. This technique is especially helpful in 'dark' environments with little monitoring.Performance problems are not always localized to Java, but often fall into the realms of database access and server load. This book gives attention to both of these issues through examples showing how to identify repetitive SQL, and identify architecture-wide performance problems ahead of production rollout. Learn how to apply load like an expert, and determine how much load to apply to determine whether your system scales. Included are walk-throughs of a dozen server-side performance puzzles that are ready to run on your own machine. Following these examples helps you learn to:Assess the performance health of four main problems areas in a Java system: The P.A.t.h. Checklist presents each area with its own set of plug-it-in-now toolsPinpoint the code at fault for CPU and other bottlenecks without a Java profilerFind memory leaks in just minutes using heapSpank, the author's open-source leak detector utility that is freely available from heapSpank.orgThe repeatable method provided in this book is an antidote to lackluster average response times that are multi-second throughout the industry. This book provides a long absent, easy-to-follow, performance training regimen that will benefit anyone programming in Java. What You'll LearnAvoid the 6 most common ways to mess up a load testDetermine the exact number of threads to dial into the load generator to test your system's scalabilityDetect the three most common SQL performance anti-patternsMeasure network response times of calls to back-end systems ('alien systems')Identify whether garbage collection performance is healthy or unhealthy and whether delays are caused by problems in the old or new generation, so you know which generation needs to be adjustedWho This Book Is ForIntermediate and expert Java developers and architects. Java experts will be able to update their skill set with the latest and most productive, open-source Java performance tools. Intermediate Java developers are exposed to the most common performance defects that repeatedly show up in Java applications, ones that account for the bulk of slow-performing systems. Experts and intermediates alike will benefit from the chapters on load generation.
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Learning Java Lambdas
Understand and utilize Java LambdasAbout This Book* Take a deep dive into one of the single most important additions to modern Java* Master Java lambdas, and fully understand functions, classes, and scope.* Improve your programming skills, which will enable you to write cleaner and more dynamic codeWho This Book Is ForLearning Java Lambdas is for developers looking to upgrade their Java skills and familiarize themselves with one of the most important new features of Java. This book is not for absolute beginners and will be more suited to professionals who are already comfortable with Java coding. You should have a basic knowledge of Java before reading this book.What You Will Learn* What a lambda is and how it differs from other Java features* How to use lambdas effectively in your own projects* The use of method references and advanced scoping* The difference between lambdas and closures* The differences in bytecode produced when using lambdasIn DetailIn this short book, we take an in-depth look at lambdas in Java, and their supporting features. The book covers essential topics, such as functional interfaces and type inference, and the key differences between lambdas and closures. You will learn about the background to functional programming and lambdas, before moving on to understanding the basic syntax of lambdas and what differentiates these anonymous functions from standard anonymous classes. Lastly, you'll learn how to invoke lambdas and look at the bytecode generated.After reading this book, you'll understand lambdas in depth, their background, syntax, implementation details, and how and when to use them. You'll also have a clear knowledge of the difference between functions and classes, and why that's relevant to lambdas. This knowledge will enable you to appreciate the improvements to type inference that drive a lot of the new features in modern Java, and will increase your understanding of method references and scoping.Style and approachThis book is a deep dive into one of the core new features of the Java language - Lambdas. It covers them in great details, making sure that you fully understand how lambdas work, and how they can be put to use in your own programs.
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Java Program Design
Get a grounding in polymorphism and other fundamental aspects of object-oriented program design and implementation, and learn a subset of design patterns that any practicing Java professional simply must know in today’s job climate. Java Program Design presents program design principles to help practicing programmers up their game and remain relevant in the face of changing trends and an evolving language. The book enhances the traditional design patterns with Java's new functional programming features, such as functional interfaces and lambda expressions. The result is a fresh treatment of design patterns that expands their power and applicability, and reflects current best practice. The book examines some well-designed classes from the Java class library, using them to illustrate the various object-oriented principles and patterns under discussion. Not only does this approach provide good, practical examples, but you will learn useful library classes you might not otherwise know about.The design of a simplified banking program is introduced in chapter 1 in a non-object-oriented incarnation and the example is carried through all chapters. You can see the object orientation develop as various design principles are progressively applied throughout the book to produce a refined, fully object-oriented version of the program in the final chapter. What You'll LearnCreate well-designed programs, and identify and improve poorly-designed onesBuild a professional-level understanding of polymorphism and its use in Java interfaces and class hierarchiesApply classic design patterns to Java programming problems while respecting the modern features of the Java languageTake advantage of classes from the Java library to facilitate the implementation of design patterns in your programsWho This Book Is ForJava programmers who are comfortable writing non-object-oriented code and want a guided immersion into the world of object-oriented Java, and intermediate programmers interested in strengthening their foundational knowledge and taking their object-oriented skills to the next level. Even advanced programmers will discover interesting examples and insights in each chapter.
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MongoDB for Java Developers
This book is for Java developers and architects who want to learn how to develop Java applications using the most popular NoSQL solution and the use cases of it.
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OCA / OCP Java SE 8 Programmer Practice Tests
Test your knowledge and prepare for the OCA/OCP exams OCA/OCP Java SE 8 Programmer Practice Tests complements the Sybex OCA: Oracle Certified Associate Java SE 8 Programmer I Certification Study Guide and the OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide for exams 1Z0-808 and 1ZO-809 by providing last minute review of 100% of exam objectives. Get the advantage of over 1,000 expert crafted questions that not only provide the answer, but also give detailed explanations. You will have access to unique practice questions that cover all 21 objective domains in the OCA/OCP exams in the format you desire--test questions can also be accessed via the Sybex interactive learning environment. Two additional practice exams will ensure that you are ready for exam day. Whether you have studied with Sybex study guides for your OCA/OCP or have used another brand, this is your chance to test your skills. Access to all practice questions online with the Sybex interactive learning environmentOver 1,000 unique practice questions and 2 practice exams include expert explanationsCovers 100% of all 21 OCA/OCP objective domains for Exams 1Z0-809 and 1Z0-809 Studying the objectives are one thing, but diving deeper and uncovering areas where further attention is needed can increase your chance of exam day success. Full coverage of all domains shows you what to expect on exam day, and accompanying explanations help you pinpoint which objectives deserve another look.
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OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide
Complete, trusted preparation for the Java Programmer II exam OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide is your comprehensive companion for preparing for Exam 1Z0-809 as well as upgrade Exam 1Z0-810 and Exam 1Z0-813. With full coverage of 100% of exam objectives, this invaluable guide reinforces what you know, teaches you what you don't know, and gives you the hands-on practice you need to boost your skills. Written by expert Java developers, this book goes beyond mere exam prep with the insight, explanations and perspectives that come from years of experience. You'll review the basics of object-oriented programming, understand functional programming, apply your knowledge to database work, and much more. From the basic to the advanced, this guide walks you through everything you need to know to confidently take the OCP 1Z0-809 Exam and upgrade exams 1Z0-810 and 1Z0-813. Java 8 represents the biggest changes to the language to date, and the latest exam now requires that you demonstrate functional programming competence in order to pass. This guide has you covered, with clear explanations and expert advice. Understand abstract classes, interfaces, and class designLearn object-oriented design principles and patternsDelve into functional programming, advanced strings, and localizationMaster IO, NIO, and JDBC with expert-led database practice If you're ready to take the next step in your IT career, OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide is your ideal companion on the road to certification.
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JavaFX For Dummies
Unleash the power of JavaFX for a wide range of devices JavaFX For Dummies gives you access to an innovative software platform that allows you to create and deliver rich Internet applications that can run across a wide variety of connected devices. This accessible book highlights the most important features of this powerful graphics platform, giving you the tools to understand it quickly and easily! No experience with JavaFX? No problem. JavaFX For Dummies has been written especially for newbies and it also serves as a great reference resource for more experienced Java developers. Author Doug Lowe has been writing programming books for decades, and he brings his experience and passion to this guide, sharing his expert approach to coding using JavaFX. The book shows you how to work with JavaFX controls, how to enhance your scenic design, and also offers advice on how to make a splash with your programs. Then, the author wraps it all up with extra recommendations and resources to guide you as you move forward. Helps developers quickly learn to take advantage of JavaFX's lightweight, high-performance platformHighlights essential JavaFX features for simple coding that can be rolled out across multiple devicesInstructs readers on methods for creating compelling, visually appealing applicationsIncludes recommendations and resources for honing your JavaFX skills With JavaFX For Dummies, you'll be on your way to easier, more efficient coding for a variety of connected devices.
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Docker and Kubernetes for Java Developers
Leverage the lethal combination of Docker and Kubernetes to automate deployment and management of Java applicationsAbout This Book• Master using Docker and Kubernetes to build, deploy and manage Java applications in a jiff• Learn how to create your own Docker image and customize your own cluster using Kubernetes• Empower the journey from development to production using this practical guide.Who This Book Is ForThe book is aimed at Java developers who are eager to build, deploy, and manage applications very quickly using container technology. They need have no knowledge of Docker and Kubernetes.What You Will Learn• Package Java applications into Docker images• Understand the running of containers locally• Explore development and deployment options with Docker• Integrate Docker into Maven builds• Manage and monitor Java applications running on Kubernetes clusters• Create Continuous Delivery pipelines for Java applications deployed to KubernetesIn DetailImagine creating and testing Java EE applications on Apache Tomcat Server or Wildfly Application server in minutes along with deploying and managing Java applications swiftly. Sounds too good to be true? But you have a reason to cheer as such scenarios are only possible by leveraging Docker and Kubernetes.This book will start by introducing Docker and delve deep into its networking and persistent storage concepts. You will then proceed to learn how to refactor monolith application into separate services by building an application and then packaging it into Docker containers. Next, you will create an image containing Java Enterprise Application and later run it using Docker. Moving on, the book will focus on Kubernetes and its features and you will learn to deploy a Java application to Kubernetes using Maven and monitor a Java application in production. By the end of the book, you will get hands-on with some more advanced topics to further extend your knowledge about Docker and Kubernetes.Style and approachAn easy-to-follow, practical guide that will help Java developers develop, deploy, and manage Java applications efficiently.
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