Definition: Database management systems (DBMSs) are computer software applications that interact with the user, other applications, and the database itself to capture and analyze data. A general-purpose DBMS is designed to allow the definition, creation, querying, update, and administration of databases.
A database management system (DBMS) consists of a collection of interrelated data and a set of program to access those data. The collection of data, usually referred to as the database, contains information about one particular enterprise. The primary goal of DBMS is to provide an environment that is both convenient and efficient to use in retrieving and storing database information.
Example of database management systems are MS Access, DB2, ORACLE, SQL Server, MySQL, Ingress, Paradox, SYBASE, INFORMIX, etc. (more…)
What is Database?
Definition: A Database is a repository for collection of related data or facts stored so that it is available to many users for different purposes. The content of database is obtained by combining data from all the different sources in an organization, so that data are available to all users and redundant data can be eliminated or at least minimized. A database contains a collection of related items or facts arranged in a specific structure called Data and Information.
Databases are used in every part of day-to-day life. Examples of common database use include: depositing or withdrawing money from a bank, making a travel reservation, accessing a library catalog, buying something from the internet via a web page, etc. (more…)
Java programming language was invented for two fundamental reasons:
- to adapt the changing environments and used and
- to implement improvements in the art of programming
Firstly it was called OAK and was designed by James Gosling, Patrick Naughton, Chris Warth, Ed Frank and Mike Sheridan at Sun Microsystems in 1991. Java is not the “Internet version of C++”. Java was not designed to replace C++, but to solve a different set of problems. Java is now used to create web pages with dynamic and interactive content, to develop large-scale enterprise applications, to enhance the functionality of world wide web servers, to provide apps for consumer devices and so on.
Java is purely object-oriented programming language. To understand more about Object Oriented Programming Structures, see our previous article on Object Oriented Programming – Theory and Examples. (more…)
A data flow diagram (DFD) is a graphical representation of the “flow” of data through an information system, modeling its process aspects. A DFD is often used as a preliminary step to create an overview of the system, which can later be elaborated.
Data flow diagram is a popular way to visualize the major steps and data involved in software system processes. This is not the same as business process modeling; DFDs were usually used to show data flows in a computer system, although they could in theory be applied to business process modeling. DFDs were useful to document the major data flow or to explore a new high-level design in terms of data flow. (more…)
Illustration of Bisection Method
The bisection method is one of the simplest and most reliable of iterative methods for the solution of nonlinear equations. This method, also known as binary chopping or half-interval method, relies on the fact that if f(x) is real and continuous in the interval a < x < b, and f(a) and f(b) are of opposite signs, that is,
f(a)*f(b) < 0
then there is at least one real root in the interval between a and b. (more…)
Introduction to Applets and Applications in Java
Venn diagram explaining features of Java Applets and Application
In java an applet is a special kind of Java program that a browser enabled with Java technology can download from the internet and run. An applet is typically embedded inside a Web page and runs in the context of the browser. In order to be provided with the standard interface between the applet and the browser environment, an applet must be a subclass of the java.applet.Applet class or javax.swing.JApplet class. Java applets are compiled using javac command, but are run either with a browser or with the appletviewer command.
Applications in java are thought to be larger than applets which runs in a desktop mode and is used as productive software application. They can be created by writing packages other than java.applet.Applet. Java application programs run in a standalone environment with the support of virtual machine(JVM). Java applications are also compiled using the javac command and run using java command. A java application has a full network and local file system access, and its potential is limited only by the creativity of its developers. (more…)
Train Ticket reservation system is a very complicated system. It is complicated because it consists of more number of entities and processes. Data in this system should be collected from more number of entities and need to be processed within more number of processes. Example of this type of system is explained below: (more…)
How to use MouseListener Interface to handle Mouse Events in Java
Concept: In this Java program the problem is to handle mouse click using the concept of an Applet and learn how to use MouseListener Interface in Java to handle Mouse Events. Also display the coordinate of the clicked point on the status and display the status of mouse event in a label. (more…)
This is the Part 2 of the Software Engineering Design – Concepts and Principles, you can read Part 1 here. If you are redirected from Part 1, you can continue reading from here.
In Part 2 of Software Engineering Design – Concepts and Principles, I’ll be discussing about Software Architecture Designs, Data Design, Requirement mapping.
Design has been described as a multistep process in which representations of data and program structure, interface characteristics, and procedural detail are synthesized from information requirements.
Architectural design represents the structure of data and program components that are required to build a computer-based system. Architectural design begins with data design and then proceeds to the derivation of one or more representations of the architectural structure of the system. (more…)
Software design sits at the technical kernel of software engineering and is applied regardless of the software process model that is used. Once software requirements have been analyzed and specified, software design is the first of three technical activities—design, code generation, and test—that are required to build and verify the software.
Each of the elements of the analysis model provides information that is necessary to create the four design models required for a complete specification of design. (more…)
What is Object Oriented Programming?
Object Oriented Programming (OOP) is commonly used in programs which require doing the same things over and over again. Much like a function or method can be ran multiple times, OOP classes can be ran multiple times, simultaneously.
When is OOP used?
OOP is used in games and some other software. The reason it is used in games is because the game requires the same things to happen over and over again at the same time, for example… (more…)