The document discusses some limitations of object-oriented programming in Java, such as lack of support for multiple inheritance and dependency injection. It proposes that Scala addresses these issues through features like traits that allow for mixing and abstracting dependencies through interfaces. This reduces tightly coupled code and avoids problems like unintended polymorphism that can occur with implementation inheritance in Java.
The document discusses SK Planet, a South Korean company that was spun off from SK Telecom in 2011 to provide new value to customers through platform business in areas such as content delivery, location-based services, new media, commerce, advertising, communication, social networking, music, internet services, and finance portals. It aims to create value across diverse business areas and have worldwide competitive strength. Major services include 11ST, ONESTOP+, and SK PLANET T Store. More information can be found on the company's home and career pages.
The document describes several design patterns including structural patterns like Adapter, Bridge, Composite, Decorator, Facade, Proxy, and Flyweight. It provides the definition, structure, and consequences of each pattern with examples. Creational patterns like Factory Method, Abstract Factory, Singleton, Prototype, and Builder are also overviewed.
The document compares four e-learning authoring applications: Lectora, Articulate, Captivate, and Camtasia. It provides descriptions of each application's features such as screen recording, screen casting, formatting options, publishing options, and types of quizzes. The document also includes examples and screenshots of projects created in each application. It aims to help readers determine which application may be best suited for their e-learning development needs.
The document discusses the adapter pattern, which converts the interface of one class into another interface clients expect. The adapter pattern allows classes to work together that couldn't otherwise due to incompatible interfaces. Several examples are provided to illustrate how the adapter pattern can be used to adapt one interface to another by inserting an adapter class between them.
Architecture | Modular Enterprise Applications | Mark NuttallJAX London
This document discusses modularity and OSGi, including:
- What modularity is and why Java needs it to reduce entanglement over time
- An overview of Enterprise OSGi and how it brings enterprise technologies to OSGi
- New features in OSGi Service Platform Release 4 such as a standard application model and bundle repository
- A demonstration of a colors application that uses OSGi bundles and services
This document provides an overview of the key services offered by the Java Development Toolkit (JDT) Core and UI, including the Java model, search engine, abstract syntax tree, and batch compiler. It aims to help plugin implementers leverage these services when building tools that integrate with the Java infrastructure, such as code metrics, auditing, and refactoring plugins. The document outlines the three main pillars of JDT - the Java model, search engine, and AST - and provides examples of how to interact with each.
The document discusses SK Planet, a South Korean company that was spun off from SK Telecom in 2011 to provide new value to customers through platform business in areas such as content delivery, location-based services, new media, commerce, advertising, communication, social networking, music, internet services, and finance portals. It aims to create value across diverse business areas and have worldwide competitive strength. Major services include 11ST, ONESTOP+, and SK PLANET T Store. More information can be found on the company's home and career pages.
The document describes several design patterns including structural patterns like Adapter, Bridge, Composite, Decorator, Facade, Proxy, and Flyweight. It provides the definition, structure, and consequences of each pattern with examples. Creational patterns like Factory Method, Abstract Factory, Singleton, Prototype, and Builder are also overviewed.
The document compares four e-learning authoring applications: Lectora, Articulate, Captivate, and Camtasia. It provides descriptions of each application's features such as screen recording, screen casting, formatting options, publishing options, and types of quizzes. The document also includes examples and screenshots of projects created in each application. It aims to help readers determine which application may be best suited for their e-learning development needs.
The document discusses the adapter pattern, which converts the interface of one class into another interface clients expect. The adapter pattern allows classes to work together that couldn't otherwise due to incompatible interfaces. Several examples are provided to illustrate how the adapter pattern can be used to adapt one interface to another by inserting an adapter class between them.
Architecture | Modular Enterprise Applications | Mark NuttallJAX London
This document discusses modularity and OSGi, including:
- What modularity is and why Java needs it to reduce entanglement over time
- An overview of Enterprise OSGi and how it brings enterprise technologies to OSGi
- New features in OSGi Service Platform Release 4 such as a standard application model and bundle repository
- A demonstration of a colors application that uses OSGi bundles and services
This document provides an overview of the key services offered by the Java Development Toolkit (JDT) Core and UI, including the Java model, search engine, abstract syntax tree, and batch compiler. It aims to help plugin implementers leverage these services when building tools that integrate with the Java infrastructure, such as code metrics, auditing, and refactoring plugins. The document outlines the three main pillars of JDT - the Java model, search engine, and AST - and provides examples of how to interact with each.
This document provides a summary of a presentation on alternative JVM languages that can be used with IBM's Social Business suite. The presentation discusses languages like Scala, Groovy, JRuby, and Kotlin that compile to Java bytecode and can therefore integrate with existing Java code and run on the Java Virtual Machine. It highlights advantages of these languages like reduced boilerplate code, type inference, and support for functional programming paradigms. The document also provides instructions on how to install and use these alternative languages with IBM Notes/Domino.
Lambda: A Peek Under The Hood - Brian GoetzJAX London
This is a *highly technical* session on the details of how Lambda expressions are implemented in the Java language, presented by Java Language Architect Brian Goetz
This document provides an overview of OpenMP, a programming model for parallel programming on shared memory architectures. It discusses key OpenMP concepts like parallel regions, data sharing attributes, worksharing constructs like parallel for loops and sections, tasks, and synchronization. The document outlines an agenda and provides examples to illustrate OpenMP directives and clauses for parallelizing loops and sections of code.
Enterprise Applications With OSGi and SpringSource dm ServerSam Brannen
This talk covers the benefits of OSGi in Enterprise Java as well as the concrete challenges and solutions to them. The focus is on SpringSource dm Server which represents a complete OSGi environment and solves many of the issues in this area. Throughout the talk demos and code samples will demonstrate the practical application of the discussed principles. This includes the stepwise migration of a (legacy) WAR based web application to a fully modularized OSGi-based web application.
This is a presentation given in a Java Open day conducted by Trainologic.
Trainologic shares its training content for free at trainologic.org you can find many more free full course there.
This document discusses Greenplum Database on HDFS (GOH). It provides an introduction and overview of GOH's architecture, features, and performance. Key points include that GOH allows Greenplum to use HDFS for storage, provides pluggable storage support, and full transaction support for tables on HDFS. It also notes challenges around supporting many concurrent queries due to limitations of the current Java-based HDFS client, and possibilities for addressing this.
With the release of OSGi Enterprise 4.2, the role of OSGi has been extended into the enterprise, alongside what has traditionally been developed using JEE. This session will cover the best practices for developing OSGi Enterprise applications and OSGi bundles in order to utilise the full power of OSGi technology, followed by a demo of using these best practices to assembly an OSGi application. At the end of the session, you will be able to learn how to use OSGi in a recommended way.
This document appears to be a presentation on Scala performance best practices. It includes sections on monitoring the JVM, avoiding stack overflows through tail recursion, dealing with OutOfMemory errors, analyzing heap dumps, and how Scala can increase memory usage due to its functional programming features like closures and implicit conversions. The presentation emphasizes methodology, tools like JConsole and MAT, and understanding how to identify and solve performance bottlenecks when working with Scala.
3978 Why is Java so different... A Session for Cobol/PLI/Assembler Developersnick_garrod
InterConnect 2015 Session 3978 Why is Java so different... A Session for Cobol/PLI/Assembler Developers. After giving sessions about Java in the past few years that tell System Programmers they should do Java on System z and that Java is just like every other language, this session tries to explain why Java is a bit different in Operating and Handling. Therefore this session tries to compare COBOL/PLI/Assembler with Java and how the Java technology works on System z: > Why can't you phase in a Java Program > How is a JIT working > Understand the Development Process of Java Applications > Debugging and Logging of Java Applications > and a lot more...
This document discusses intrinsic methods in the HotSpot JVM. It provides background on what intrinsic methods are and how they are implemented and optimized in JVMs and native compilers. It gives examples of intrinsic methods in HotSpot VM like System.currentTimeMillis(), Unsafe.compareAndSwapInt(), and Math.log(). It also discusses intrinsic methods added in TaobaoJDK like TCrc32 and how to experiment implementing your own intrinsic methods in the C1 and C2 compilers.
Updates on the current status of Graal VM, a platform dedicated to run multiple programming languages at excellent performance. Experimental binaries are available from http://www.oracle.com/technetwork/oracle-labs/program-languages/overview/index.html.
The main body of work related to supporting dynamic languages on the JVM at Oracle today is done within the Nashorn project. While on the surface it looks like we're busy creating a JavaScript runtime, in reality JavaScript is only the beginning, and not the ultimate goal. Nashorn has served as the proving ground for new approaches for implementing a dynamic language on top of the JVM, and we're eager to – once solidified – crystallize these into a reusable dynamic language implementer's toolkit. We have faced challenges of optimally mapping JavaScript local variables to JVM types (or: "hey, there's a static type inference algorithm in your dynamic language compiler"), doing liveness analysis, cutting up methods too large to fit into a single JVM method, efficiently representing large array and object literals in compiled code, creating a system for on-demand compilation of several type-specialized variants of the same function, and more. Along the way, we have reached the limits of our initial internal representation (fun fact: you can't do liveness analysis on an AST. We learned it the hard way.) and started sketching up an intermediate representation that would be easy to emit from a dynamic language compiler, and that could be taken over by a toolchain to perform the operations described above then on it and finally output standard Java bytecode for JIT to take over. Elevator pitch: like LLVM, but for dynamic languages on the JVM.
This technical talk introduces Ruby as a programming language. It provides an overview of Ruby's history, basic features, and differences from other languages like Java and PHP. The document also discusses Ruby on Rails, meta programming in Ruby, and resources for learning Ruby.
Managing large and distributed Eclipse server applications.Gunnar Wagenknecht
This document discusses managing large distributed Eclipse server applications. It covers application stacks including servlets, JSP, OSGi bundles, and third party libraries. It also discusses integrating technologies like Jetty, Equinox, logging, clustering, provisioning, and the RAP framework. Specific challenges and solutions are provided around areas like integrating Jetty with OSGi, implementing a flexible logging system, using ZooKeeper for clustering and coordination, and leveraging p2 for provisioning. The document advocates contributing back through bug reports, patches, and code.
In this session you will learn:
1. Principles of Object-Oriented Programming
2. Writing your first Java Application
3. Elements of Java programming language
4. Built in Data Types
5. Conditional Statements
6. Loops
How should a professional software developer behave in code? What guidelines should one follow? How should we name our constructs? What about OOP principles? What's their real use?
This classic training module in my training curricula is the cornerstone of my professionalism. These are my conduit guidelines at work. I've held this training > 10 times, including at Voxxed Days Bucharest 2016 and at a Bucharest Java User Group meetup.
Apresentado na React Conf Brasil, em São Paulo, 7 de Outubro de 2017 #reactconfbr
Entusiasta da open web e software livre. Software Developer na globo.com e membro da JS foundation. Já trabalhou como desenvolvedor em empresas como Videolog e Petrobras. Em 2015, foi um dos desenvolvedores de software mais notáveis no GitHub, tendo feito contribuições significativas para projetos de código aberto por 500 dias seguidos. Orador em mais de vinte conferências dando palestras sobre tecnologias web como JavaScript / ES6, Web Performance, React e Canvas / WebGL.
http://raphamorim.io
@raphamundi
- Patrocínio: Pipefy, Globo.com, Meteor, Apollo, Taller, Fullcircle, Quanto, Udacity, Cubos, Segware, Entria
- Apoio: Concrete, Rung, LuizaLabs, Movile, Rivendel, GreenMile, STQ, Hi Platform
- Promoção: InfoQ, DevNaEstrada, CodamosClub, JS Ladies, NodeBR, Training Center, BrazilJS, Tableless, GeekHunter
- Afterparty: An English Thing
It has been said that one should code as if the person maintaining the code is a violent psychopath who knows where you live. But why do we work with psychopaths? That question unfortunately cannot be answered in this presentation. However, we can shed some light on how to code for readability hopefully avoiding the problem altogether.
Readable code is about a lot more than producing beautiful code. In fact, it has nothing really to do with the beauty of the code and everything to do with the ability to quickly understand what the code does.
In this presentation we will discuss why readable code is so important. We will cover six commonly reoccurring patterns that made code hard to read, why they occur, and how they can easily be avoided:
* Deep Nesting
* Unnecessary Generalization
* Ambiguous Naming
* Hard to Follow Flow of Execution
* Code Style vs. Individualism
* Code Comments
These concepts may be applied to any programming language.
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This document provides a summary of a presentation on alternative JVM languages that can be used with IBM's Social Business suite. The presentation discusses languages like Scala, Groovy, JRuby, and Kotlin that compile to Java bytecode and can therefore integrate with existing Java code and run on the Java Virtual Machine. It highlights advantages of these languages like reduced boilerplate code, type inference, and support for functional programming paradigms. The document also provides instructions on how to install and use these alternative languages with IBM Notes/Domino.
Lambda: A Peek Under The Hood - Brian GoetzJAX London
This is a *highly technical* session on the details of how Lambda expressions are implemented in the Java language, presented by Java Language Architect Brian Goetz
This document provides an overview of OpenMP, a programming model for parallel programming on shared memory architectures. It discusses key OpenMP concepts like parallel regions, data sharing attributes, worksharing constructs like parallel for loops and sections, tasks, and synchronization. The document outlines an agenda and provides examples to illustrate OpenMP directives and clauses for parallelizing loops and sections of code.
Enterprise Applications With OSGi and SpringSource dm ServerSam Brannen
This talk covers the benefits of OSGi in Enterprise Java as well as the concrete challenges and solutions to them. The focus is on SpringSource dm Server which represents a complete OSGi environment and solves many of the issues in this area. Throughout the talk demos and code samples will demonstrate the practical application of the discussed principles. This includes the stepwise migration of a (legacy) WAR based web application to a fully modularized OSGi-based web application.
This is a presentation given in a Java Open day conducted by Trainologic.
Trainologic shares its training content for free at trainologic.org you can find many more free full course there.
This document discusses Greenplum Database on HDFS (GOH). It provides an introduction and overview of GOH's architecture, features, and performance. Key points include that GOH allows Greenplum to use HDFS for storage, provides pluggable storage support, and full transaction support for tables on HDFS. It also notes challenges around supporting many concurrent queries due to limitations of the current Java-based HDFS client, and possibilities for addressing this.
With the release of OSGi Enterprise 4.2, the role of OSGi has been extended into the enterprise, alongside what has traditionally been developed using JEE. This session will cover the best practices for developing OSGi Enterprise applications and OSGi bundles in order to utilise the full power of OSGi technology, followed by a demo of using these best practices to assembly an OSGi application. At the end of the session, you will be able to learn how to use OSGi in a recommended way.
This document appears to be a presentation on Scala performance best practices. It includes sections on monitoring the JVM, avoiding stack overflows through tail recursion, dealing with OutOfMemory errors, analyzing heap dumps, and how Scala can increase memory usage due to its functional programming features like closures and implicit conversions. The presentation emphasizes methodology, tools like JConsole and MAT, and understanding how to identify and solve performance bottlenecks when working with Scala.
3978 Why is Java so different... A Session for Cobol/PLI/Assembler Developersnick_garrod
InterConnect 2015 Session 3978 Why is Java so different... A Session for Cobol/PLI/Assembler Developers. After giving sessions about Java in the past few years that tell System Programmers they should do Java on System z and that Java is just like every other language, this session tries to explain why Java is a bit different in Operating and Handling. Therefore this session tries to compare COBOL/PLI/Assembler with Java and how the Java technology works on System z: > Why can't you phase in a Java Program > How is a JIT working > Understand the Development Process of Java Applications > Debugging and Logging of Java Applications > and a lot more...
This document discusses intrinsic methods in the HotSpot JVM. It provides background on what intrinsic methods are and how they are implemented and optimized in JVMs and native compilers. It gives examples of intrinsic methods in HotSpot VM like System.currentTimeMillis(), Unsafe.compareAndSwapInt(), and Math.log(). It also discusses intrinsic methods added in TaobaoJDK like TCrc32 and how to experiment implementing your own intrinsic methods in the C1 and C2 compilers.
Updates on the current status of Graal VM, a platform dedicated to run multiple programming languages at excellent performance. Experimental binaries are available from http://www.oracle.com/technetwork/oracle-labs/program-languages/overview/index.html.
The main body of work related to supporting dynamic languages on the JVM at Oracle today is done within the Nashorn project. While on the surface it looks like we're busy creating a JavaScript runtime, in reality JavaScript is only the beginning, and not the ultimate goal. Nashorn has served as the proving ground for new approaches for implementing a dynamic language on top of the JVM, and we're eager to – once solidified – crystallize these into a reusable dynamic language implementer's toolkit. We have faced challenges of optimally mapping JavaScript local variables to JVM types (or: "hey, there's a static type inference algorithm in your dynamic language compiler"), doing liveness analysis, cutting up methods too large to fit into a single JVM method, efficiently representing large array and object literals in compiled code, creating a system for on-demand compilation of several type-specialized variants of the same function, and more. Along the way, we have reached the limits of our initial internal representation (fun fact: you can't do liveness analysis on an AST. We learned it the hard way.) and started sketching up an intermediate representation that would be easy to emit from a dynamic language compiler, and that could be taken over by a toolchain to perform the operations described above then on it and finally output standard Java bytecode for JIT to take over. Elevator pitch: like LLVM, but for dynamic languages on the JVM.
This technical talk introduces Ruby as a programming language. It provides an overview of Ruby's history, basic features, and differences from other languages like Java and PHP. The document also discusses Ruby on Rails, meta programming in Ruby, and resources for learning Ruby.
Managing large and distributed Eclipse server applications.Gunnar Wagenknecht
This document discusses managing large distributed Eclipse server applications. It covers application stacks including servlets, JSP, OSGi bundles, and third party libraries. It also discusses integrating technologies like Jetty, Equinox, logging, clustering, provisioning, and the RAP framework. Specific challenges and solutions are provided around areas like integrating Jetty with OSGi, implementing a flexible logging system, using ZooKeeper for clustering and coordination, and leveraging p2 for provisioning. The document advocates contributing back through bug reports, patches, and code.
In this session you will learn:
1. Principles of Object-Oriented Programming
2. Writing your first Java Application
3. Elements of Java programming language
4. Built in Data Types
5. Conditional Statements
6. Loops
How should a professional software developer behave in code? What guidelines should one follow? How should we name our constructs? What about OOP principles? What's their real use?
This classic training module in my training curricula is the cornerstone of my professionalism. These are my conduit guidelines at work. I've held this training > 10 times, including at Voxxed Days Bucharest 2016 and at a Bucharest Java User Group meetup.
Apresentado na React Conf Brasil, em São Paulo, 7 de Outubro de 2017 #reactconfbr
Entusiasta da open web e software livre. Software Developer na globo.com e membro da JS foundation. Já trabalhou como desenvolvedor em empresas como Videolog e Petrobras. Em 2015, foi um dos desenvolvedores de software mais notáveis no GitHub, tendo feito contribuições significativas para projetos de código aberto por 500 dias seguidos. Orador em mais de vinte conferências dando palestras sobre tecnologias web como JavaScript / ES6, Web Performance, React e Canvas / WebGL.
http://raphamorim.io
@raphamundi
- Patrocínio: Pipefy, Globo.com, Meteor, Apollo, Taller, Fullcircle, Quanto, Udacity, Cubos, Segware, Entria
- Apoio: Concrete, Rung, LuizaLabs, Movile, Rivendel, GreenMile, STQ, Hi Platform
- Promoção: InfoQ, DevNaEstrada, CodamosClub, JS Ladies, NodeBR, Training Center, BrazilJS, Tableless, GeekHunter
- Afterparty: An English Thing
It has been said that one should code as if the person maintaining the code is a violent psychopath who knows where you live. But why do we work with psychopaths? That question unfortunately cannot be answered in this presentation. However, we can shed some light on how to code for readability hopefully avoiding the problem altogether.
Readable code is about a lot more than producing beautiful code. In fact, it has nothing really to do with the beauty of the code and everything to do with the ability to quickly understand what the code does.
In this presentation we will discuss why readable code is so important. We will cover six commonly reoccurring patterns that made code hard to read, why they occur, and how they can easily be avoided:
* Deep Nesting
* Unnecessary Generalization
* Ambiguous Naming
* Hard to Follow Flow of Execution
* Code Style vs. Individualism
* Code Comments
These concepts may be applied to any programming language.
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