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Caching is the most important performance optimization technique. There are many things that can be cached in persistence, objects, data, database connections, database statements, query results, meta-data, relationships, to name a few. Caching in object persistence normally refers to the caching of objects or their data. Caching also influences object identity, that is that if you read an object, then read the same object again you should get the identical object back (same reference). JPA 1.0 does not define a shared object cache, JPA providers can support a shared object cache or not, however most do. Caching in JPA is required with-in a transaction or within an extended persistence context to preserve object identity, but JPA does not require that caching be supported across transactions or persistence contexts. JPA 2.0 defines the concept of a shared cache. The @Cacheable annotation or cacheable XML attribute can be used to enable or disable caching on a class.

"This chapter introduces the Expression Language (also referred to as the EL), which provides an important mechanism for enabling the presentation layer (web pages) to communicate with the application logic (backing beans). The EL is used by both JavaServer Faces technology and JavaServer Pages (JSP) technology. The EL represents a union of the expression languages offered by JavaServer Faces technology and JSP technology."

We conduct various online competitions at state level, district level and at college level. We also conduct spot events at colleges.

We are group of passionate programmers, who would like to help the interested students learn the art of programming. At Merit Campus, we are trying to bring all the programing related information into one place. Here you can read the topics, watch videos, answer questions, write programs, track your progress, compare with other students and finally publish your skills or include it in your resume

JSP for beginners. JSP tutorial for beginners with examples in eclipse. JSP tutorial point. JSP tutorial with examples. Java Server Pages. Learn jsp online.

Java Servlet tutorial for beginners with examples in eclipse. Servlets tutorial point. Servlets tutorials with examples. Servlets tutorials in eclipse examples

Spring tutorial for beginners with examples. Spring tutorial with examples in eclipse. Learn spring framework in java online. Download spring framework examples

The HashMap is one of the high-performance data structure in the Java collections framework.

A character which is not an alphabet or numeric character is called a special character. We should remove all the special characters from the string so that we can read the string clearly and fluently.

This course is very much suitable for intermediate level automation testers and manual testers who wants to have automation exposure, it takes the beginners through all the techniques of writing effective automated web tests using Java. Software Test Automation is growing rapidly in IT Industry & the need of development experience and tool's knowledge is enormous to stay in testing profession.Join Our Selenium Testing Training and Stay Ahead in Your Career.

A pretty common request that I hear is how do you build a wizard in RichFaces. So, that's exactly what we are going to build. You come into a bar and on each table there is a screen via which you place an order. You click to start an order, a wizard is launched where you enter all the required information and place the order. We will also have the ability to view all placed orders. Additionally, we will be able to change the look and feel of the ordering screen using RichFaces' skinnability feature.

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" Why Object Teams? Team spirit for your objects Building complex systems from isolated objects often yields poor structure which readily decays during system evolution. Objects should team-up in order to co-operate and jointly deliver complex behaviors. Objects play specific roles within a given Team. Context based dispatch Role instances are attached as specializers to existing objects. Object behavior is controlled by the currently active context that determines which roles are active at a given point in time. Contexts are reified into team instances, which may further be used to mediate between roles and maintain state of the collaboration. Modules larger than classes On the road to re-use of modules larger than classes two approaches compete: frameworks and components. For many applications white box frameworks are too fragile and black box components to rigid. Object Teams provide a middle road which balances encapsulation and adaptability. "

" Everthing Object Teams - adding team spirit to your objects. Object Teams with Null Annotations without comments The recent release of Juno M4 brought an interesting combination: The Object Teams Development Tooling now natively supports annotation-based null analysis for Object Teams (OT/J). How about that? :)"

" Should you need to compile an OT/J program outside the OTDT, the following steps should enable you to use ANT for this task: download ecotj.jar you'll always find the latest version here in the column "Command Line Compiler" add it to your ANT runtime classpath (either place it in your ant_lib directory or provide the path by a -lib command line option to ant). in your build.xml set the property build.compiler to use the OTDT compiler in tasks, like that: "