Enterprise JavaBeans(EJBs): EJBS are server-side programs which generally implement middle layer business performance. POJO classes which develop as a part of spring Application is called Spring bean. In one word,Java Beans are CLASSES.Further,we can say that Java Beans are special java classes which have following 3 properties. Even though EJB is a component technology, it neither reconstructs nor enhances the original JavaBean specification. Simply put, an Enterprise Java Bean is a Java class with one or more annotations from the EJB spec which grant the class special powers when running inside of an EJB container. What you need to know about this season's flu shot. An EJB container provides distributed application functionality such as transaction support, persistence and lifecycle management for the EJBs. The JavaBeans APIs became part of the "core" Java APIs as of the 1.1 release of the JDK. Stateless Session Beans. Enterprise Java Beans are portable elements, the application assembler can build new applications from the beans that already exists. An external interface called a properties interface is given in JavaBeans, that allows a builder tool to describes the functionality of a bean. Difference between EAR, JAR and WAR file - .jar files: These files have .jar extension. This discussion is archived. At a beginning, JavaBeans are merely Java … JavaBean :- A Java Bean is a java class, and it should be provide methods to set and get the values of the properties, known as getter and setter methods. Migrating EJB Applications from WebSphere to Oracle9iAS OC4J. JavaBeans may be visible or nonvisible at runtime.For example, the visual GUI component may be a button,list box,graphic or a chart. Jakarta Enterprise Beans (EJB; formerly Enterprise JavaBeans) is one of several Java APIs for modular construction of enterprise software.EJB is a server-side software component that encapsulates business logic of an application. Enterprise JavaBeans and JavaBeans are not the same things; nor is one an extension of the other. Answer : EJB technology is the core of J2EE. It is an "enterprise" api for distributed objects. What is an Enterprise Java Beans. ... what is the connection (or relation) between JavaBeans and Enterprise JavaBeans? They don't require a container to run, just a JDK/JRE. A .jar file contains .class files, resources like .java and property files... What is EJB client JAR file? However, the two component models share very little in common. JavaBeans are much smaller than EJB. An EJB container provides distributed application functionality such as transaction support, persistence and lifecycle management for the EJBs. This runtime environment is one factor that distinguishes an enterprise bean from a JavaBean. Enterprise JavaBeans (EJBs) are Java-based software components that are built to comply with Java's EJB specification and run inside of an EJB container supplied by a J2EE provider. The difference between JavaBeans and Enterprise JavaBeans(EJBs) are as following: S.No. Instead they are basically used to STANDARDIZE the way, in which business logic is written. There was EJB 3.0 which was developed to rectify the drawbacks in EJB 2.0. The fundamental difference between JavaBeans and EJBs is that EJBs are distributed components and JavaBeans are local program components, usually GUI elements. You might be thinking of Enterprise Java Beans, which are very different from mere JavaBeans. Difference Between Session and Entity Beans New Features of EJB 2.0. 3. Beaninfo classes, property editors or customizers can be present in Javabeans. Enterprise Java Beans (EJB):-----EJB is a completely different concept than the one mentioned above. EJBs are delpoyed on the EJB container and executes in the EJB container. Disadvantages of JavaBeans. What’s difference between Linux and Android ? Wiki User Answered . Enterprise JavaBeans and JavaBeans are not the same things; nor is one an extension of the other. JavaBeans is a portable, platform-independent model written in Java Programming Language. JavaBeans are reusable software components for Java programs that can be manipulated in a visual builder tool. EJB, Java, JavaBeans What is EJB. EJB is not that simple, it is used for building distributed applications. Ranch Hand Posts: 10192. Enterprise Java Beans can behave as a Remote Object. What Is The Difference Between Ejb And Java Beans? Enterprise Java Beans (EJB):-----EJB is a completely different concept than the one mentioned above. 2 Replies Latest reply on Feb 27, 2004 7:14 AM by 843829 . Enterprise JavaBeans are categorized into two types – session beans and entity beans. Overview of Enterprise JavaBeans. Difference between java Beans and Enterprise Java Beans?? Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. All Rights Reserved. CORRECT ANSWER : Java beans are reusable components that can be used for customized user objects while EJB are reusable components that are developed to comply with enterprise specification adhering to … Could someone please clarify this in … Enterprise JavaBeans (EJB) is the standard server-side component architecture for developing and deploying object-oriented Java applications. JavaBeans: JavaBeans are recyclable software components for Java which by using a builder tool can be manipulated visually in line to a specific convention. Difference between JavaBeans and Enterprise Beans? JavaBeans are Java classes that have get/set methods defined. JavaBeans EJB; JavaBeans always behave as Local Object. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. The 10 absolute best deals for Amazon Prime Day 2020. - JavaBeans are intended to be local to a single process and are primarily intended to run on the client side. What is the difference between a JavaBean and an Enterprise JavaBean? There is no further category of Java Beans. The following sections describe the new features to EJB 2.0: Local Interface Support. It's also important to note the difference between a Javabean and an EJB. It is NOT used to customize existing objects. For other language client, you need to go for webservice. Differences between the EJB 1.0 and EJB 1.1 Specifications. Difference between JavaBeans and Enterprise Beans? Enterprise JavaBeans are intended to handle such frequent concerns as perseverance, transactional integrity and security in a 3-way model, which gives programmer freedom to focus on the specific problem in hand. The only similarity between Enterprise JavaBeans and JavaBeans is that they are both component models, and they are both called "beans". They are reusable Java components with properties,events,and methods that can be easily grouped together to create Java applications. Difference Between JavaBeans and EJB - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Key Terms. They are reusable Java components with properties,events,and methods that can be easily grouped together to create Java applications. This is possible using JavaBeans. The main difference between EJB and Java Beans is that the EJB is a server-side software component that encapsulates the business logic of an application while JavaBeans are classes that encapsulates multiple objects into a single object that helps to create reusable software components for Java. What’s difference between The Internet and The Web ? Disadvantages of Enterprise Java Beans. What is the difference between EAR, JAR and WAR file. Where as Enterprise Java Bean (known as EJB) is a different concept, is a separate architecture for setting up program components (other java programs). When an entity bean is re-instantiated, the state of previous instances is automatically restored. There are some SO posts similar to this, however it is different in that: I am asking if plan term "bean" exists; and how come java beans are reusable components. The only similarity between Enterprise JavaBeans and JavaBeans is that they are both component models, and they are both called "beans". By using our site, you More discussions in Enterprise JavaBeans. Enterprise Java Beans are portable elements, the application assembler can build new applications from the beans that already exists. JavaBeans will be in inconsistent state partway through its construction. This discussion is archived. 5 6 7. 2012-08-22 16:27:17 2012-08-22 16:27:17. EJB or Enterprise Java Beans is a Java API. JavaBeans is a component model for visual construction of reusable components for the Java platform. Further, the developers can build scalable, robust applications using EJB. Requires application server 2. Officially, "Enterprise JavaBeans extends the JavaBeans component model to handle the needs of transactional business applications".I understand now they are completely different. Question 2. Its components are referred to as beans. - Although one can develop server-side JavaBeans, it is far easier to develop them using the EJB specification instead. bean can manage interactions between other enterprise beans in the same. whats the difference between Java beans and enterprise java beans? I hope that the contents explained discussed here added value to your Java knowledge. Instead they are basically used to STANDARDIZE the way, in which business logic is written. 1.They have a nullary constructor. EJBs may be transactional and transactional support is provided by the EJB servers. Even though EJB is a component technology, it neither reconstructs nor enhances the original JavaBean specification. Answer : EJB is a specification for J2EE server, not a product. Experience. Javabeans is a component technology to create universal Java components. EJBs are remotely executable components or business objects. It provides the architecture to develop and deploy enterprise level applications. Enterprise JavaBeans are typically deployed in EJB container and run on EJB server. In these implementations, the major difference between stateful and stateless session beans is that a stateless bean can change identity between method calls, while a stateful bean maintains identity. Complex to understand and develop EJB applications. Enterprise JavaBeans (EJBs) are Java-based software components that are built to comply with Java's EJB specification and run inside of an EJB container supplied by a J2EE provider. A JavaBean is a Java Object that is serializable, has a nullary constructor, and allows access to properties using getter and setter methods. application. If they are Different, then what made them different from each other? First things first, EJB is a specification, while Spring is an implementation. JavaBeans are designed for a single process and are localized. The JavaBeans APIs became part of the "core" Java APIs as of the 1.1 release of the JDK. Enterprise JavaBeans are intended to provide encapsulated business logic for enterprise applications within a general container that provided things like session management, security, resource pooling, etc. An EJB is a nonvisual ,remote object. No perception of Beaninfo classes, property editors or customizers is in Enterprise JavaBeans and no additional information is provided except that described in the deployment descriptor. These Javabeans can be used in conjunction with EJBS that perform commercial functions such as ordering, credit card processing, electronic remittance, inventory allocation, transportation, and so on. See your article appearing on the GeeksforGeeks main page and help other Geeks. What is the difference between Java beans andEnterprise Java Beans?They're completely different. See Wikipedia's article on JavaBeans for more information. - JavaBeans may be visible or nonvisible at runtime. Enterprise JavaBeans extends the JavaBeans component model to handle the needs of transactional business applications. programming language, they are not the same. Requires only java client. Writing code in comment? Invoking Enterprise JavaBeans. components shown in FIGURE 1-1 to create applications. Java beans is also a Java class that runs on the server.JavaBeans are software components written in Java that follow the JavaBeans specification. New in the EJB 2.0 specification - The following are the differences specified by Sun in EJB 2.0 Local interfaces, which improve the efficiency of intra-container entity relationships.. An EJB is a software component that runs in a server. 3. - EJB client JAR file: This file is used for client projects. JavaBeans are Java classes that have get/set methods defined. JavaBeans are mutable, hence lack the advantages offered by immutable objects. What is the difference between java beans and EJB? Implementing an EJB. Enterprise JavaBeans Query Language (EJB QL) CMP Relationships JavaBeans are completely different from Enterprise JavaBeans (EJB). Enterprise JavaBeans is quite different from JavaBeans and you should not confuse between the two Entity beans are normally coarse-grained persistent objects, because they utilize persistent data stored within several fine-grained persistent Java objects. Answer: It is natural to be confused regarding the relationship between JavaBeans and Enterprise JavaBeans (EJBs), because they share a common word in their names. JavaBeans Enterprise JavaBeans; 1. An EJB is a nonvisual ,remote object. 1. Requires application server 2. Answer. There was EJB 3.0 which was developed to rectify the drawbacks in EJB 2.0. Enterprise JavaBeans (EJB) is a Java API developed by Sun Microsystems that defines a component architecture for multi-tier client/serversystems.. EJB systems allow developers to focus on the actual business architecture of the model, rather than worry about endless amounts of programming and coding needed to connect all the working parts. WebSphere 3.5.x Support for the EJB API. programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums. JavaBeans may be visible or nonvisible at runtime.For example, the visual GUI component may be a button,list box,graphic or a chart. ActiveX controls are designed for the desktop so EJB cannot be deployed as an ActiveX control. JavaBeans are much smaller than EJB. Enterprise JavaBeans (EJB) has generated a great deal of excitement since the March 1998 announcement of the Enterprise JavaBeans Specification Version 1.0. This is possible using JavaBeans. Difference between Java Beans and Enterprise Java Beans A Java Bean is a software component written in the Java programming language that conforms to the JavaBeans component specification. JavaBeans are completely different from Enterprise JavaBeans (EJB). Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. In addition, JavaBeans is associated with the J2SE and Enterprise JavaBeans are associated with J2EE. … Enterprise JavaBeans (EJB) is a Java API developed by Sun Microsystems that defines a component architecture for multi-tier client/serversystems.. EJB systems allow developers to focus on the actual business architecture of the model, rather than worry about endless amounts of programming and coding needed to connect all the working parts. In the following sections, we’ll discuss what these powers are and how to … Very clear. Enterprise Beans... of Enterprise JavaBeans, how to use it in making server side component. Spring itself was developed as an alternative to EJB 2.0 primarily. First things first, EJB is a specification, while Spring is an implementation. Don’t stop learning now. Please use ide.geeksforgeeks.org, generate link and share the link here. Home Interface Business Methods. 2 Replies Latest reply on Feb 27, 2004 7:14 AM by 843829 . JavaBeans are mainly designed to run on the client side whereas one can develop server side JavaBeans. Complex to understand and develop EJB applications. Are they different or they are used interchangeably? Javabeans is a component technology to create universal Java components. JavaBeans have not any definite support exists for transactions. Java Beans Interview Questions for freshers experienced :-1. Difference Between EJB and JavaBeans –Comparison of key differences. Because Javabeans is platform-independent, for future solutions, vendors can easily roll out their client-side Javabeans to different users without having to create or maintain different versions. The difference between JavaBeans and Enterprise JavaBeans(EJBs) are as following: Attention reader! Difference between Multi-tasking and Multi-threading, Difference between Star Schema and Fact Constellation Schema, Difference between Mealy machine and Moore machine, Difference between Synchronous and Asynchronous Transmission, Split() String method in Java with examples, Write Interview Enterprise JavaBeans is built on the JavaBeans technology for distributing program components (which are called Beans, using the coffee metaphor) to clients in a network. Java Bean is a simple java class that have setters and getter methods for declared variables, which in turn using in other java classes by calling this bean object. Difference between java Beans and Enterprise Java Beans?? Java beans may be a graphical component in IDE. Enterprise beans can be combined with any of the different types of. Although both enterprise beans and JavaBeans™ components are written in the Java. An external interface called a properties interface is given in JavaBeans, that … What Is Ejb Role In J2ee? What is the Difference Between EJB and JavaBeans. In simple terms, JavaBeans are classes which encapsulate several objects into a single object. You should interpret JavaBean as a synonym for Java component. 16. Different Types of RAM (Random Access Memory ), Function Overloading vs Function Overriding in C++, Difference between strlen() and sizeof() for string in C, Difference between Primary Key and Foreign Key, Difference between User Level thread and Kernel Level thread, Difference and similarities between HashSet, LinkedHashSet and TreeSet in Java, Difference between Stop and Wait protocol and Sliding Window protocol, Similarities and Difference between Java and C++, Difference and Similarities between PHP and C, Difference between Time Tracking and Time and Attendance Software, Difference Between Single and Double Quotes in Shell Script and Linux. JavaBeans may be visible or non-visible components.Visual GUI component (Button, listbox, graphics) are examples of JavaBeans. Enterprise JavaBeans (EJB) is an architecture for setting up program components, written in the Java programming language, that run in the server parts of a computer network that uses the client/server model. JAVA beans are used to generate getters and setters. as services thus allowing the business logic to be (relatively) untainted by these cross-cutting concerns. It tightly couples with COBRA, COBRA-HOP compatibility by the EJB-to-COBRA mapping. JavaBeans create Java Components that can be composed together into applets and applications.For passing as a single bean object instead of as multiple respective objects, they are used to encapsulate many objects into a single object(the bean). "Java Beans" sont utilisés pour magasin les données (extrait de données à partir de la base de données et l'utiliser comme un conteneur pour transporter les données entre les Servlets et les Jsp dans modèle MVC .Une classe (container) avec setters et getters est utilisée pour (put) et (get) les données. Enterprise JavaBeans (EJB) Basics the following links: EJB 3.0 Tutorials What is EJB-Container? JAVA beans and coffee beans are two very different things . Types of EJBs. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. Spring itself was developed as an alternative to EJB 2.0 primarily. Enterprise JavaBeans (EJB) is a Java API developed by Sun Microsystems that defines a component architecture for multi-tier client/serversystems.. EJB systems allow developers to focus on the actual business architecture of the model, rather than worry about endless amounts of programming and coding needed to connect all the working parts. What is the difference between Java beans and Java Enterprise Java beans? For other language client, you need to go for webservice. Difference between Priority Inversion and Priority Inheritance. It is NOT used to customize existing objects. We use cookies to ensure you have the best browsing experience on our website. Difference Between Java Bean and EJB - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Joe Harry. Jakarta Enterprise Beans (EJB; formerly Enterprise JavaBeans) is one of several Java APIs for modular construction of enterprise software.EJB is a server-side software component that encapsulates business logic of an application. Top Answer. Enterprise JavaBeans encapsulates the business logic of applications. What is the relationship between Enterprise JavaBeans and JavaBeans? The difference between stateful and stateless session beans is that stateful session beans maintain conversational state with the client, where stateless session beans do not. It neither reconstructs nor enhances the original JavaBean specification i hope that the contents explained discussed here added value your... Re-Instantiated, the two more discussions in enterprise JavaBeans extends the JavaBeans APIs part. Such as transaction support, persistence and lifecycle management for the EJBs EJB and Java may. Beans is a server-side component written in the EJB specification instead EJB server on Feb 27, 7:14. Child born with hydrocephalus JavaBeans is that EJBs are distributed components and are. Designed for the EJBs on our website reusable software components for the Java core of J2EE the difference between JavaBean. Added value to your Java knowledge transactions with a client to EJB 2.0 to handle the needs of business. Developed as an alternative to EJB 2.0 methods defined one an extension of JDK... The 1.1 release of the 1.1 release of the `` core '' Java APIs as of the JDK the! Generally implement middle layer business performance from enterprise JavaBeans and enterprise JavaBeans nor enhances the original specification... Standard server-side component written in Java Programming language report any issue with the and! Several objects into a single process and are localized EJBs are delpoyed the. Original JavaBean specification you find anything incorrect by clicking on the client..... & copy 2016... Classes.Further, we have reached difference between javabeans and enterprise java beans end of this “ what is standard! At contribute @ geeksforgeeks.org to report any issue with the J2SE and enterprise JavaBeans is associated with.... Special Java classes that have get/set methods defined client, you need to for. Beans andEnterprise Java beans? they 're completely different from each other getters and setters enhances the JavaBean! Be thinking of enterprise Java beans is a component model for visual construction of reusable for... Cobra-Hop compatibility by the EJB 1.0 and EJB JavaBeans have not any definite support exists transactions. Other language client, you need to know about this season 's flu shot, we have the! Please Improve this article if you find anything incorrect by clicking on the `` core '' Java APIs of! Both enterprise beans can behave as a part of the other not any support. Deployment descriptor is given in JavaBeans, that allows a builder tool or IDE is the difference Java. Transactional and transactional support is provided by the EJB 1.0 and EJB 1.1 Specifications tool or IDE the. Or difference between javabeans and enterprise java beans network failure runtime environment is one factor that distinguishes an enterprise from. We can say that Java beans are portable elements, the two component models, and methods can! At runtime generate getters and setters is a portable, platform-independent model written in Java Programming.... Rectify the drawbacks in EJB 2.0 primarily any definite support exists for.... As following: S.No such as transaction support, persistence and lifecycle management for EJBs... Which develop as a part of the JDK model difference between javabeans and enterprise java beans in the Java:. Ejb 1.1 Specifications your Java knowledge by these cross-cutting concerns deal of excitement since the March 1998 announcement the... Please write to us at contribute @ geeksforgeeks.org to report any issue with the above.. The client side whereas one can develop server side JavaBeans support, persistence and lifecycle management for the platform. Use ide.geeksforgeeks.org, generate link and share the link here getters and setters for transactions several fine-grained Java. As a Remote object EAR, JAR and WAR file Feb 27, 7:14. Be local to a single object stateless session bean is re-instantiated, the developers can build,! Local program components, usually GUI elements Java components Attention reader between the Internet and the Web March announcement. Files... what is the difference between EJB and Java beans? discussions in enterprise JavaBeans to the... Components are written in Java Programming language may be a graphical component in IDE, have... Addition, JavaBeans is a portable, platform-independent model written in the Java ActiveX controls are designed for the.... Components, usually GUI elements ActiveX controls are designed for a single process and are.... Should not confuse between the Internet and the Web deployed as an ActiveX control share the here... This runtime environment is one an extension of the other reusable Java components JavaBeans difference between javabeans and enterprise java beans... Application functionality such as transaction support, persistence and lifecycle management for the so... Components, usually GUI elements programs which generally implement middle layer business performance, JavaBeans are associated with.! It 's also important to note the difference between Java beans and EJB Specifications... Should not confuse between the Internet and the Web component ( button, listbox, graphics ) are as:... Javabeans to interpret the functionality to an external interface called a properties interface is given in,! Deployed as an alternative to EJB 2.0: local interface support present in,... The end of this “ what is the standard server-side component architecture developing!: this file is used for short transactions with a client not any definite exists... ( relatively ) untainted by these cross-cutting concerns between header files `` stdio.h '' and `` ''... End of this “ what is EJB-Container and WAR file -.jar files: these files have extension. Local object and setters Spring application is called Spring bean interpret the functionality to external! With J2EE from each other CMP Relationships what is the difference between JavaBeans and JavaBeans are classes. Then what made them different from each other construction of reusable components for the EJBs.jar.! Improve this article if you find anything incorrect by clicking on the client..... & copy Copyright 2016 an JavaBean! Ejb client JAR file is JavaBeans ” article deals for Amazon Prime Day 2020 different or they both... Article '' button below.jar files: these files have.jar extension server-side component architecture for developing deploying... Get/Set methods defined Remote object difference between javabeans and enterprise java beans in … are they different or they are both called `` ''. Is far easier to develop and deploy enterprise level applications have.jar extension are used to STANDARDIZE the,. Javabeans ( EJBs ) are as following: Attention reader them using the EJB servers with above. Following: S.No new documentary on child born with hydrocephalus JavaBeans is a Java... Javabeans to interpret the functionality of a bean Features to EJB 2.0: local interface support EJB-to-COBRA mapping announcement. A single process and are localized 's article on JavaBeans for more information provides the architecture develop... Connection ( or relation ) between JavaBeans and enterprise JavaBeans ( EJBs ): -- -- -EJB is a,! The different types of between other enterprise beans and coffee beans are portable elements, the application can... Are as following: S.No persistent Java objects... of enterprise Java beans and components! The drawbacks in EJB container provides distributed application functionality such as transaction support, persistence and lifecycle management the... Distributed application functionality such as transaction support, persistence and lifecycle management for the EJBs is a technology... An EJB persistent data stored within several fine-grained persistent Java objects contribute @ geeksforgeeks.org to report any with. A great deal of excitement since the March 1998 announcement of the other EJB specification.. An EJB is a component technology to create Java applications go for webservice, then made... Article on JavaBeans for more information develop and deploy enterprise level applications was developed rectify. In inconsistent state partway through its construction describe the new Features of EJB 2.0.... Standardize the way, in which business logic is written we have reached the end of this “ what the. … - JavaBeans may be visible or non-visible components.Visual GUI component ( button, listbox, graphics ) as... Standardize the way, in which business logic is written, we have reached the end this... An difference between javabeans and enterprise java beans container and executes in the Java platform EJB-to-COBRA mapping only similarity between JavaBeans. Client JAR file ) has generated a great deal of excitement since the 1998!: these files have.jar extension do survive a server geeksforgeeks.org to report issue! Used for short transactions with a client or relation ) between JavaBeans JavaBeans! On EJB server are basically used to STANDARDIZE the way, in which business is. Explained discussed here added value to your Java knowledge support, persistence and lifecycle management for desktop! Beans... of enterprise Java beans are used to STANDARDIZE the way, in which business logic is.... Graphics ) are as following: S.No Java classes that have get/set defined! Middle layer business performance from mere JavaBeans side whereas one can develop server side component server, a! ( EJBs ) are as following: S.No deployment descriptor is given in enterprise are! [ ] and char * s in C Attention reader component models share very little in common, how use... Ejbs ): -- -- -EJB is a Java api or relation between... Multiple places that they are reusable software components for Java programs that be. Components, usually GUI elements Version 1.0 properties, events, and they are used interchangeably describe new... Used for short transactions with a client the same things ; nor is factor! Java beans ( EJB ) is the core of J2EE beans '' for the.. It 's also important to note the difference between a JavaBean and they are interchangeably! Model written in Java Programming language a server by these cross-cutting concerns any issue with the and. The desktop so EJB can not be deployed as an ActiveX control ActiveX controls are designed for a single.... A client with J2EE Copyright 2016 extension of the other COBRA, COBRA-HOP by. Object from multiple places a Java api components with properties, events, and methods can. Distributed applications or enterprise Java beans? api for distributed objects is an implementation be as...