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All Java programs can be classified as Applications and Applets. An application is a standalone Java program that runs as a true application, outside of a browser. An application is basically a program that just happens to be written in the Java language. At a high level, it is just like any application that is written in another programming language.
Top 25 Core Java Interview Questions and Answers For Freshers Click Here to Know More on Java Course Syllabus,Duration,Fee etc.. Q1: Java is an Object Oriented Language. What does that mean? There are a number of different programming paradigms of which OOP is but one. Programs are modelled as Objects which are analogous to real world
Hibernate Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of Hibernate. What is JDBC? JDBC stands for Java Database Connectivityand provides a set of Java API for accessing the relational databases from Java program. These Java APIs enables Java programs to execute SQL statements
An Object/relational mappings are usually defined in an XML document. This mapping file instructs Hibernate how to map the defined class or classes to the database tables. Though many Hibernate users choose to write the XML by hand, a number of tools exist to generate the mapping document. These include XDoclet, Middlegen and AndroMDA for advanced Hibernate users. Let us
The entire concept of Hibernate is to take the values from Java class attributes and persist them to a database table. A mapping document helps Hibernate in determining how to pull the values from the classes and map them with table and associated fields. Java classes whose objects or instances will be stored in database tables are called persistent classes
Session is used to get a physical connection with a database. The Session object is lightweight and designed to be instantiated each time an interaction is needed with the database. Persistent objects are saved and retrieved through a Session object. The session objects should not be kept open for a long time because they are not usually thread safe and
Hibernate requires to know in advance where to find the mapping information that defines how your Java classes relate to the database tables. Hibernate also requires a set of configuration settings related to database and other related parameters. All such information is usually supplied as a standard Java properties file called hibernate.properties, or as an XML file namedhibernate.cfg.xml. I will
This chapter will explain how to install Hibernate and other associated packages to prepare a develop environment for the Hibernate applications. We will work with MySQL database to experiment with Hibernate examples, so make sure you already have setup for MySQL database. Downloading Hibernate: It is assumed that you already have latest version of Java is installed on your machine.
The Hibernate architecture is layered to keep you isolated from having to know the underlying APIs. Hibernate makes use of the database and configuration data to provide persistence services (and persistent objects) to the application. Following is a very high level view of the Hibernate Application Architecture. Following is a detailed view of the Hibernate Application Architecture with few important