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The J2EE platform is mainly used for enterprise applications. The model that is used for J2EE platform comprises of many tiers that are distributed. There are numerous applications and the different application components can be installed in many different machines. Logic for various applications is divided into components based on the function. An application component belongs to a certain tier of the J2EE application. Some such examples are cited below:
• Components belonging to Client-tier are run on the client machine.
• J2EE server handles the Web-tier components and also business-tier components.
• Enterprise information system (EIS) server runs the EIS-tier software.
Enterprise Edition of the Java 2 has the need for J2EE applications. There can be many J2EE applications and these have in them J2EE modules. Some such applications are web applications, EJBs, and application clients. The information about the specific application and shared libraries are also found here. J2EE application is basically a bunch of J2EE modules tied together which integrates them together. A J2EE application is basically one Java Archive file with the '.ear' extension to the name of the file. The J2EE applications are binary compatible and this binary code can be universally used in any J2EE environment. This feature provides ease of testing any application.
• Components belonging to Client-tier are run on the client machine.
• J2EE server handles the Web-tier components and also business-tier components.
• Enterprise information system (EIS) server runs the EIS-tier software.
Enterprise Edition of the Java 2 has the need for J2EE applications. There can be many J2EE applications and these have in them J2EE modules. Some such applications are web applications, EJBs, and application clients. The information about the specific application and shared libraries are also found here. J2EE application is basically a bunch of J2EE modules tied together which integrates them together. A J2EE application is basically one Java Archive file with the '.ear' extension to the name of the file. The J2EE applications are binary compatible and this binary code can be universally used in any J2EE environment. This feature provides ease of testing any application.
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