what are the four components of j2ee application?
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The four J2EE application components are: Client tier, Web tier, business tier and enterprise information system (EIS) tier.
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JDK is the Java Development Kit, JRE is the Java Runtime Environment, Java SE is the standard edition, and so on.
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['The Client Layer.', 'The Presentation Layer.', 'The Business Logic Layer.', 'The Data Access Layer.']
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Java SE (Standard Edition) is for building desktop apps. Java ME (Micro Edition) is for old mobile devices. Java EE (Enterprise Edition) is for developing web based applications.
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['DriverManager. The DriverManager class keeps track of the available JDBC drivers and creates database connections for you. ... ', 'Driver. The Driver interface is primarily responsible for creating database connections. ... ', 'Connection. The Connection interface represents the core of the JDBC API. ... ', 'Statement. ... ', 'ResultSet.']
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['Implement the domain model. Create the Order domain class.', 'Implement the data source layer. Create an in-memory database. ... ', 'Implement the presentation layer. Create the REST endpoints. ... ', 'Pull the application together. Create the main method that will run the application.']
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JNDI resource lookups in WebSphere Application Server. The Java Naming and Directory Interface (JNDI) is mainly used for accessing resources that are managed by a container. JEE application servers expose JDBC data sources, JMS connection factories, JTA user transactions among others to applications via JNDI.
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['Used to create session id in web application. ... ', 'It extends Object class.', 'It implements Serializable and Comparable interfaces.']
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['1.1 Simple. Java is straightforward to use, write, compile, debug, and learn than alternative programming languages. ... ', '1.2 Object-Oriented. It permits you to form standard programs and reusable code.', '1.3 Platform-Independent. ... ', '1.4 Distributed computing. ... ', '1.5 Secure. ... ', '1.6 Memory allocation. ... ', '1.7 Multithreaded.']
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The Java 2 SDK is a development environment for building applications, applets, and components using the Java programming language. The Java 2 SDK includes tools useful for developing and testing programs written in the Java programming language and running on the Java platform.
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['Enterprise JavaBeans Entity Beans.', 'Java Data Objects.', 'Castor.', 'TopLink.', 'Spring DAO.', 'Hibernate.', 'And many more.']
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['gjxdm.', 'jxrst.', 'jxufe.', 'jxdds.', 'gjxdd.', 'jxbrl.']
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['Orientation.', 'Problem Definition.', 'Data Collection.', 'Model Formulation.', 'Model Solution.', 'Validation and Output Analysis.', 'Implementation and Monitoring.']
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['Create a new Java Application project.', 'Add a JFrame Form to Source Packages.', 'Add a JToolBar to the top of the form.', 'Add the following components to the toolbar (see screenshot).']
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['create table in the database It is optional.', 'create applicationContext. xml file It contains information of DataSource, SessionFactory etc.', 'create Employee. ... ', 'create employee. ... ', 'create EmployeeDao. ... ', 'create InsertTest.']
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['Configuration Manager site server. ... ', 'Configuration Manager site system. ... ', 'Configuration Manager component site system role. ... ', 'Configuration Manager site database server. ... ', 'SMS Provider. ... ', 'Application catalog web service point. ... ', 'Application catalog website point.']
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['Infrastructure as a service (IaaS)', 'Platform as a service (PaaS)', 'Software as a service (SaaS)']