Java Programming

Import statements

#include statements

Where is Java being used

1. JSP 2. Applets 3. J2EE 4. JavaBeans 5. Mobile

Facts about Java

1. Object Oriented 2. Platform independent 3. Simple 4. Secure 5. Architecture neutral 6. Portable 7. Robust 8. Multi threaded 9. Interpreted 10. High Prtformance 11. Distributed 12. Dynamic

Types of java Applications

1. Web application 2. Standalone Application 3. Enterprise Application 4. Mobile Application

Ckass definition

A java program may contain multiple class definitions. Classes are the main and important elements of any java program. These classes are used to plot the objects of real world problems

Java

An Object-oriented programming language developed by Sun Microsystems and released in 1995. JAVA programs are platform independent which means they can be run on any operating system with any type of processor. Java code that runs on one platform does not need to be recompiled to run on another platform, write once, run anywhere (WORA)

Enterprise Application

An application that is distributed in nature, such as banking applications etc.

Applets

Another type of java program that used within a web page to add many new features to a web browser

Platform independent

C and C++ are platform dependency language hence the application programs written in one operating system cannot run in any other operation system

Object oriented

In java everything is an object. Java can be easily expanded since it is based on the object model

Documentation Section

It comprises of a comment line which gives the name program, the programmer's name and some other brief details.

Standalone Application

It is also known as desktop application or window-based application.

Interpreted

JAva byte code is translated on the fly to native machine instructions and is not stored anywhere

James Gosling

Java Developer

Editions of Java technology

Java SE, JEE, JME

Architectural-neutral

Java compiler generates an architecture-neutral object film format which makes the compiled code to be executable on many processors, with the presence Java runtime system.

Simple

Java is designed to be easy to learn. If you understand the basic concept of OOP java would be easy to master

Mobile

Java is used in mobile devices

Mobile Application

Java is used to create application software for mobile devices

Web Application

Java is used to create server-side web apps

JSP

Java is used to create web applications like PHP and ASP, Java server pages used with normal HTML tags

Robust

Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking

Popular Java Editors

Notepad, NetBeans, Eclipse

Main Method Class

Since every java stand alone program requires a main method as the starting point of the program. This class is essentially a part of java program. A simple java program contains only this part of the program

JavaBeans

Something like Visual Basic, a reusable software component that can be easily assemble to create some new advance apps

Package Statement

The first statement allowed in java file is the package statement which is used to declare a package name and it informs the compiler that the classes defined within the program belong to this package package package_name;

J2EE

The software Java 2 Enterprise Edition are used by various companies to transfer data based on XML structured documents.

Secure

With java's secure feature it enables to develop virus-free, tamper-free systems.Authentication techniques are based on public-key encryption

Portable

being architecture neutral and having no implementation dependent aspects of the specification makes java portable

interface statement

interface are like class that includes a group of method declarations. This is an optional section and can be used only when programmers want to implement multiple inheritance

Multi-Threaded

it is possible to write programs that can do many tasks simultaneously

Dynamic

java is considered to be more dynamic than C and C++ since it is designed to adapt to an evolving environment.

Distributed

java is designed for the distributed environment of the internet

High Performance

with the use of just-in-time compilers java enables high performance