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Session Bean: is a non-persistent object that provides some business logic running on the server. Session beans do not provide system break down. There are two kinds of session beans
1. Stateless session beans
2. Stateful session beans
Entity Bean: is a persistent object that presents object views of the data, generally a row in a database. They have the primary key as a unique key identifier. Multiple EJB clients can give each entity bean. Entity beans may provide system shutdowns. Entity beans can have two kinds of persistence
1. Container-Managed Persistence (CMP) - The container is responsible for providing the bean's state.
2. Bean-Managed Persistence (BMP) - The entity bean is responsible for giving its own state.
Message-driven Bean: is added with the Java Message Service (JMS) to give the ability to react as a message consumer and perform asynchronous processing between the message producer and the server.
Explain what is constructors ? It is frequent the case in which overloaded techniques are essentially the similar except that one supplies default values for a few of the argum
The Java programming language is object-oriented and includes automatic garbage collection. Garbage collection is the process of reclaiming memory taken up by unreferenced objects.
EJBs are distributed elements, which need the RMI framework for object distribution. An EJB application server gives more services like object pooling, transaction management, data
Implement a program that can compute your taxes (assume year 2012, as- sume a form 1040EZ). The form should ask for your ling status (single, married), income, deductions and cred
The series of steps followed by an application is known its life cycle. A JSF application typically follows six steps in its life. 1. Restore view phase 2. Apply request valu
What is the use of Wrapper class You can create an object of Wrapper class using a String or a primitive data type Integer num = new Integer (4); or Integer num = n
i have got project of Vending machine. would you please help me about how to start and how to use coding.thanks
How much CPU time does an applet get? One of the few legitimate concerns about hostile applets is excessive use of CPU time. It is possible on a non-preemptively multitasking s
How to Passing Parameters to Applets ? Parameters are passed to applets in NAME=VALUE pairs in tags among the opening and closing APPLET tags. Inside the applet, you read th
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