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The Performance Paradox of the JVM: Why More Hardware Means More
Expert Tip The Performance Paradox of the JVM: Why More Hardware Means More As computer hardware gets cheaper and faster, administrators managing Java based servers are frequently encountering serious problems when managing their runtime environments. JVM handles the task of garbage collection for the developer - cleaning up the space a developer has allocated for objects once an instance no longer has any references pointing to it. Some garbage collection is done quickly and invisibly. But certain sanitation tasks, which fortunately occur with minimal frequency, take significantly longer, causing the JVM to pause, and raising the ire of end users and administrators alike. Read this TheServerSide.com Expert Tip to better understand the JVM performance problem, how the JVM manages memory and how best to approach JVM Performance. Sponsored By: TheServerSide.com Expert Tip The Performance Paradox of the JVM: Why More Hardware Means More Expert Tip The Performance Paradox of the JVM: Why More Hardware Means More Table of Contents The Performance Paradox of the JVM: Why More Hardware Means More Failures Resources from Azul Systems Sponsored By: Page 2 of 8 TheServerSide.com Expert Tip The Performance Paradox of the JVM: Why More Hardware Means More The Performance Paradox of the JVM: Why More Hardware Means More Failures By Cameron McKenzie The Problem of the Unpredictable Pause As computer hardware gets cheaper and faster, administrators managing Java based servers are frequently encountering serious problems when managing their runtime environments. While our servers are getting decked out with faster and faster hardware, the Java Virtual Machines (JVMs) that are running on them can't effectively leverage the extra hardware without hitting a wall and temporarily freezing. -
Java (Programming Langua a (Programming Language)
Java (programming language) From Wikipedia, the free encyclopedialopedia "Java language" redirects here. For the natural language from the Indonesian island of Java, see Javanese language. Not to be confused with JavaScript. Java multi-paradigm: object-oriented, structured, imperative, Paradigm(s) functional, generic, reflective, concurrent James Gosling and Designed by Sun Microsystems Developer Oracle Corporation Appeared in 1995[1] Java Standard Edition 8 Update Stable release 5 (1.8.0_5) / April 15, 2014; 2 months ago Static, strong, safe, nominative, Typing discipline manifest Major OpenJDK, many others implementations Dialects Generic Java, Pizza Ada 83, C++, C#,[2] Eiffel,[3] Generic Java, Mesa,[4] Modula- Influenced by 3,[5] Oberon,[6] Objective-C,[7] UCSD Pascal,[8][9] Smalltalk Ada 2005, BeanShell, C#, Clojure, D, ECMAScript, Influenced Groovy, J#, JavaScript, Kotlin, PHP, Python, Scala, Seed7, Vala Implementation C and C++ language OS Cross-platform (multi-platform) GNU General Public License, License Java CommuniCommunity Process Filename .java , .class, .jar extension(s) Website For Java Developers Java Programming at Wikibooks Java is a computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few impimplementation dependencies as possible.ble. It is intended to let application developers "write once, run ananywhere" (WORA), meaning that code that runs on one platform does not need to be recompiled to rurun on another. Java applications ns are typically compiled to bytecode (class file) that can run on anany Java virtual machine (JVM)) regardless of computer architecture. Java is, as of 2014, one of tthe most popular programming ng languages in use, particularly for client-server web applications, witwith a reported 9 million developers.[10][11] Java was originallyy developed by James Gosling at Sun Microsystems (which has since merged into Oracle Corporation) and released in 1995 as a core component of Sun Microsystems'Micros Java platform. -
Real-Time Java for Embedded Devices: the Javamen Project*
REAL-TIME JAVA FOR EMBEDDED DEVICES: THE JAVAMEN PROJECT* A. Borg, N. Audsley, A. Wellings The University of York, UK ABSTRACT: Hardware Java-specific processors have been shown to provide the performance benefits over their software counterparts that make Java a feasible environment for executing even the most computationally expensive systems. In most cases, the core of these processors is a simple stack machine on which stack operations and logic and arithmetic operations are carried out. More complex bytecodes are implemented either in microcode through a sequence of stack and memory operations or in Java and therefore through a set of bytecodes. This paper investigates the Figure 1: Three alternatives for executing Java code (take from (6)) state-of-the-art in Java processors and identifies two areas of improvement for specialising these processors timeliness as a key issue. The language therefore fails to for real-time applications. This is achieved through a allow more advanced temporal requirements of threads combination of the implementation of real-time Java to be expressed and virtual machine implementations components in hardware and by using application- may behave unpredictably in this context. For example, specific characteristics expressed at the Java level to whereas a basic thread priority can be specified, it is not drive a co-design strategy. An implementation of these required to be observed by a virtual machine and there propositions will provide a flexible Ravenscar- is no guarantee that the highest priority thread will compliant virtual machine that provides better preempt lower priority threads. In order to address this performance while still guaranteeing real-time shortcoming, two competing specifications have been requirements. -
Not-Dead-Yet--Java-On-Desktop.Pdf
NOT DEAD YET Java on Desktop About me… Gerrit Grunwald 2012… The desktop is dead… …the future of applications… …is the Web ! 8 years later… My application folder… My applications folder (future) My applications folder (reality) ??? Seems desktop is not dead ! But what about Java ? Available Toolkits AWT Abstract Window Toolkit Abstract Window Toolkit Since 1995 Cross Platform Platform dependent Bound to native controls Interface to native controls SWT Standard Window Toolkit Standard Window Toolkit Based on IBM Smalltalk from 1993 Cross Platform Platform dependent Wrapper around native controls Java Swing Successor to AWT Java Swing Since Java 1.2 (1998) Cross Platform Platform independent Introduced Look and Feels Emulates the appearance of native controls Java FX Script Intended successor to Swing Java FX Script Since Java 1.6 (2008) Cross Platform Platform independent No Java Syntax Declarative way to describe UI's (based on F3 from Chris Oliver) Java FX Successor to Swing Java FX Since Java 7 (2011) Cross Platform Platform independent Port from JavaFX Script to Java Not part of the Java SE distribution since Java 11 Most of these are still in use… Is Java FX dead ? Is Java FX dead ? Open Sourced as OpenJFX (openjfx.io) Driven by the community Can run on mobile using Gluon technology (gluonhq.com) Can run on web using JPro technology (jpro.one) Actively developed and is getting new features too Where does Java on Desktop suck ? Lack of 3rd party controls Swing had great support over years, JavaFX lacks behind Missing features… e.g. -
The Java® Language Specification Java SE 8 Edition
The Java® Language Specification Java SE 8 Edition James Gosling Bill Joy Guy Steele Gilad Bracha Alex Buckley 2015-02-13 Specification: JSR-337 Java® SE 8 Release Contents ("Specification") Version: 8 Status: Maintenance Release Release: March 2015 Copyright © 1997, 2015, Oracle America, Inc. and/or its affiliates. 500 Oracle Parkway, Redwood City, California 94065, U.S.A. All rights reserved. Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners. The Specification provided herein is provided to you only under the Limited License Grant included herein as Appendix A. Please see Appendix A, Limited License Grant. To Maurizio, with deepest thanks. Table of Contents Preface to the Java SE 8 Edition xix 1 Introduction 1 1.1 Organization of the Specification 2 1.2 Example Programs 6 1.3 Notation 6 1.4 Relationship to Predefined Classes and Interfaces 7 1.5 Feedback 7 1.6 References 7 2 Grammars 9 2.1 Context-Free Grammars 9 2.2 The Lexical Grammar 9 2.3 The Syntactic Grammar 10 2.4 Grammar Notation 10 3 Lexical Structure 15 3.1 Unicode 15 3.2 Lexical Translations 16 3.3 Unicode Escapes 17 3.4 Line Terminators 19 3.5 Input Elements and Tokens 19 3.6 White Space 20 3.7 Comments 21 3.8 Identifiers 22 3.9 Keywords 24 3.10 Literals 24 3.10.1 Integer Literals 25 3.10.2 Floating-Point Literals 31 3.10.3 Boolean Literals 34 3.10.4 Character Literals 34 3.10.5 String Literals 35 3.10.6 Escape Sequences for Character and String Literals 37 3.10.7 The Null Literal 38 3.11 Separators -
Scala Tutorial
Scala Tutorial SCALA TUTORIAL Simply Easy Learning by tutorialspoint.com tutorialspoint.com i ABOUT THE TUTORIAL Scala Tutorial Scala is a modern multi-paradigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way. Scala has been created by Martin Odersky and he released the first version in 2003. Scala smoothly integrates features of object-oriented and functional languages. This tutorial gives a great understanding on Scala. Audience This tutorial has been prepared for the beginners to help them understand programming Language Scala in simple and easy steps. After completing this tutorial, you will find yourself at a moderate level of expertise in using Scala from where you can take yourself to next levels. Prerequisites Scala Programming is based on Java, so if you are aware of Java syntax, then it's pretty easy to learn Scala. Further if you do not have expertise in Java but you know any other programming language like C, C++ or Python, then it will also help in grasping Scala concepts very quickly. Copyright & Disclaimer Notice All the content and graphics on this tutorial are the property of tutorialspoint.com. Any content from tutorialspoint.com or this tutorial may not be redistributed or reproduced in any way, shape, or form without the written permission of tutorialspoint.com. Failure to do so is a violation of copyright laws. This tutorial may contain inaccuracies or errors and tutorialspoint provides no guarantee regarding the accuracy of the site or its contents including this tutorial. If you discover that the tutorialspoint.com site or this tutorial content contains some errors, please contact us at [email protected] TUTORIALS POINT Simply Easy Learning Table of Content Scala Tutorial .......................................................................... -
S32 Design Studio for S32 Platform 3.4 Installation Guide
S32 Design Studio for S32 Platform 3.4 Installation Guide Document Number: S32DSIG Rev. 1.0, 12/2020 Contents System Requirements......................................................................................................................3 Installation prerequisites for Linux platforms.............................................................................5 Downloading S32DS 3.4................................................................................................................12 Downloading the S32DS 3.4 installer................................................................................................................12 Obtaining the activation code.............................................................................................................................12 Installing S32DS 3.4......................................................................................................................14 Debian 8 post-installation settings..................................................................................................................... 20 Installing product updates and packages................................................................................... 23 Installing Synopsys tools...............................................................................................................25 Installing VP Explorer........................................................................................................................................25 Post-installation settings.................................................................................................................................... -
Bibliography of Concrete Abstractions: an Introduction To
Out of print; full text available for free at http://www.gustavus.edu/+max/concrete-abstractions.html Bibliography [1] Harold Abelson, Gerald J. Sussman, and friends. Computer Exercises to Accom- pany Structure and Interpretation of Computer Programs. New York: McGraw- Hill, 1988. [2] Harold Abelson and Gerald Jay Sussman. Structure and Interpretation of Com- puter Programs. Cambridge, MA: The MIT Press and New York: McGraw-Hill, 2nd edition, 1996. [3] Alfred V. Aho and Jeffrey D. Ullman. Foundations of Computer Science.New York: Computer Science Press, 1992. [4] Ronald E. Anderson, Deborah G. Johnson, Donald Gotterbarn, and Judith Perville. Using the new ACM code of ethics in decision making. Communica- tions of the ACM, 36(2):98±107, February 1993. [5] Ken Arnold and James Gosling. The Java Programming Language. Reading, MA: Addison-Wesley, 2nd edition, 1998. [6] Henk Barendregt. The impact of the lambda calculus in logic and computer science. The Bulletin of Symbolic Logic, 3(2):181±215, June 1997. [7] Grady Booch. Object-oriented Analysis and Design with Applications.Menlo Park, CA: Benjamin/Cummings, 2nd edition, 1994. [8] Charles L. Bouton. Nim, a game with a complete mathematical theory. The Annals of Mathematics, 3:35±39, 1901. Series 2. [9] Mary Campione and Kathy Walrath. The Java Tutorial: Object-Oriented Pro- gramming for the Internet. Reading, MA: Addison-Wesley, 2nd edition, 1998. Excerpted from Concrete Abstractions; copyright © 1999 by Max Hailperin, Barbara Kaiser, and Karl Knight 649 650 Bibliography [10] Canadian Broadcasting Company. Quirks and quarks. Radio program, Decem- ber 19, 1992. Included chocolate bar puzzle posed by Dr. -
Java Version 40 Download Apache Tomcat ® Welcome to the Apache Tomcat ® 9.X Software Download Page
java version 40 download Apache Tomcat ® Welcome to the Apache Tomcat ® 9.x software download page. This page provides download links for obtaining the latest version of Tomcat 9.0.x software, as well as links to the archives of older releases. Unsure which version you need? Specification versions implemented, minimum Java version required and lots more useful information may be found on the 'which version?' page. Quick Navigation. Release Integrity. You must verify the integrity of the downloaded files. We provide OpenPGP signatures for every release file. This signature should be matched against the KEYS file which contains the OpenPGP keys of Tomcat's Release Managers. We also provide SHA-512 checksums for every release file. After you download the file, you should calculate a checksum for your download, and make sure it is the same as ours. Mirrors. You are currently using https://mirror.softaculous.com/apache/ . If you encounter a problem with this mirror, please select another mirror. If all mirrors are failing, there are backup mirrors (at the end of the mirrors list) that should be available. Please see the README file for packaging information. It explains what every distribution contains. Apache Tomcat ® The Apache Tomcat ® software is an open source implementation of the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, Jakarta WebSocket, Jakarta Annotations and Jakarta Authentication specifications. These specifications are part of the Jakarta EE platform. The Jakarta EE platform is the evolution of the Java EE platform. Tomcat 10 and later implement specifications developed as part of Jakarta EE. Tomcat 9 and earlier implement specifications developed as part of Java EE. -
Optimizing for Jazelle DBX and Java Hotspot™ Technology Case Study
Optimizing Midlets for Size and Performance Simon Robinson Innaworks www.innaworks.com TS-5109 2007 JavaOneSM Conference | Session TS-5109 | Goal of This Talk Pushing the size and performance of Java™ Platform, Micro Edition (Java ME platform) applications on today’s handsets 2007 JavaOneSM Conference | Session TS-5109 | 2 Agenda Why size and performance matters Under the bonnet of a Java ME Platform MIDlet Optimization strategy Optimization techniques Optimizing for Jazelle DBX and Java HotSpot™ technology Case study 2007 JavaOneSM Conference | Session TS-5109 | 3 Agenda Why size and performance matters Under the bonnet of a Java ME Platform MIDlet Optimization strategy Optimization techniques Optimizing for Jazelle DBX and Java HotSpot™ technology Case study 2007 JavaOneSM Conference | Session TS-5109 | 4 Why Size and Performance Matters Adoption = Potential market size × How much fun ×Marketing 2007 JavaOneSM Conference | Session TS-5109 | 5 Why Size and Performance Matters Adoption = Potential market size × How much fun ×Marketing Handset coverage matters 2007 JavaOneSM Conference | Session TS-5109 | 6 Why Size and Performance Matters Adoption = Potential market size × How much fun ×Marketing How fun is your game? Perceived quality matters 2007 JavaOneSM Conference | Session TS-5109 | 7 Constraints of Consumer Handsets JAR size Heap memory Nokia S40 v1 (3300, etc.) 64 kB 370 kB Nokia S40 v2 (6230, etc.) 128 kB 512 kB Sharp GX22 100 kB 512 kB DoJa 2.5 (m420i) 30 B 1.5 MB 15% game sales for handsets < 64 kB Java Archive (JAR) file size -
Scala for the Impatient
Scala for the Impatient Copyright © Cay S. Horstmann 2012. All Rights Reserved. The evolution of Java and C++ has slowed down considerably, and programmers who are eager to use more modern language features are looking elsewhere. Scala is an attractive choice; in fact, I think it is by far the most attractive choice for programmers who want to move beyond Java or C++. Scala has a concise syntax that is refreshing after the Java boilerplate. It runs on the Java virtual machine, providing access to a huge set of libraries and tools. It embraces the functional programming style without abandoning object-orientation, giving you an incremental learning path to a new paradigm. The Scala interpreter lets you run quick experiments, which makes learning Scala very enjoyable. And, last but not least, Scala is statically typed, enabling the compiler to find errors, so that you don't waste time finding them later in running programs (or worse, don't find them). I wrote this book for impatient readers who want to start programming with Scala right away. I assume you know Java, C#, or C++, and I won't bore you with explaining variables, loops, or classes. I won't exhaustively list all features of the language, I won't lecture you about the superiority of one paradigm over another, and I won't make you suffer through long and contrived examples. Instead, you will get the information that you need in compact chunks that you can read and review as needed. Scala is a big language, but you can use it effectively without knowing all of its details intimately. -
Java in Embedded Linux Systems
Java in Embedded Linux Systems Java in Embedded Linux Systems Thomas Petazzoni / Michael Opdenacker Free Electrons http://free-electrons.com/ Created with OpenOffice.org 2.x Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 1 Rights to copy Attribution ± ShareAlike 2.5 © Copyright 2004-2008 You are free Free Electrons to copy, distribute, display, and perform the work [email protected] to make derivative works to make commercial use of the work Document sources, updates and translations: Under the following conditions http://free-electrons.com/articles/java Attribution. You must give the original author credit. Corrections, suggestions, contributions and Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license translations are welcome! identical to this one. For any reuse or distribution, you must make clear to others the license terms of this work. Any of these conditions can be waived if you get permission from the copyright holder. Your fair use and other rights are in no way affected by the above. License text: http://creativecommons.org/licenses/by-sa/2.5/legalcode Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 2 Best viewed with... This document is best viewed with a recent PDF reader or with OpenOffice.org itself! Take advantage of internal