They are used to encapsulate many objects into a single object (the bean), so that they can be passed around as a single bean object instead of as multiple individual objects. A JavaBean is a Java Object that is serializable, has a nullary constructor, and allows access to properties using...
JavaBeans are classes that encapsulate many objects into a single object (the bean). It has the following properties. import Serializable Interface private fields constructors getter/setter The serializability of a class is enabled by the class implementing the java.io.Serializable interface. Classes ...
What are the differences between a HashMap and a Hashtable in Java? What is the difference between public, protected, package-private and private in Java? What is a serialVersionUID and why should I use it? What is reflection and why is it useful?
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I've bean doing some JSP tutorials and I don't understand what the point of a bean class is. All it is, is get and set methods. why do we use them? public class UserData { String username; String email; int age; public void setUsername( String value ) { username = value; } pub...
32.1 What Is an Enterprise Bean? Written in the Java programming language, an enterprise bean is a server-side component that encapsulates the business logic of an application. The business logic is the code that fulfills the purpose of the application. In an inventory control application, for ...
As its name suggests, a session bean is similar to an interactive session. A session bean is not shared; it can have only one client, in the same way that an interactive session can have only one user. When the client terminates, its session bean appears to terminate and is no longer ...
What is a CLASS file Java compilers can create compiled JAVA files that have the CLASS file extension. These files can be executed using a Java Virtual Machine (JVM). Likewise, the Java Runtime Environment (JRE) can execute CLASS files, however it is unable to compile them. CLASS files ...
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Querying a channel You can now query the number of containers in a channel, and the total amount of storage that they occupy. There is a new EXEC CICS command,QUERY CHANNEL, and the equivalent JCICS method, getContainerCount(), on the Channel class. ...