Our Java Tutorial or Core Java Tutorial or Java Programming Tutorial is designed for students and working professionals. Java is an object-oriented, class-based, concurrent, general-purpose computer-programming language and widely used robust technology. Let's start learning Java from basic questions like what is Java, Core Java, where it is used, what type of applications are created in Java, why use java and Java platforms etc. Our Java tutorial helps you to learn Java with easy and simple examples.
What is Java
Java is a programming language and a platform.
Java is a high level, robust, secured and object-oriented programming language.
Platform: Any hardware or software environment in which a program runs, is known as a platform. Since Java has its own runtime environment (JRE) and API, it is called platform.
Let's have a quick look at java programming example. A detailed description of hello Java example is given in next page.Test it Now
Where it is used
According to Sun, 3 billion devices run java. There are many devices where Java is currently used. Some of them are as follows:
Types of Java Applications
There are mainly 4 types of applications that can be created using java programming:
1) Standalone Application
Standalone applications are also known as desktop applications or window-based applications. These are traditional software that we need to install on every machine. Example of standalone applications are: Media player, antivirus etc. AWT and Swing are used in java for creating standalone applications.
2) Web Application
An application that runs on the server side and creates dynamic page, is called web application. Currently, servlet, jsp, struts, spring, hibernate, jsf etc. technologies are used for creating web applications in java.
3) Enterprise Application
An application that is distributed in nature, such as banking applications etc. is called enterprise application. It has the advantage of high level security, load balancing and clustering. In java, EJB is used for creating enterprise applications.
4) Mobile Application
An application that is created for mobile devices. Currently Android and Java ME are used for creating mobile applications.
Java Platforms / Editions
There are 4 platforms or editions of Java:
1) Java SE (Java Standard Edition)
It is a java programming platform. It includes Java programming APIs such as java.lang, java.io, java.net, java.util, java.sql, java.math etc. It includes core topics like OOPs, String, Regex, Exception, Inner classes, Multithreading, I/O Stream, Networking, AWT, Swing, Reflection, Collection etc.
2) Java EE (Java Enterprise Edition)
It is an enterprise platform which is mainly used to develop web and enterprise applications. It is built on the top of Java SE platform. It includes topics like Servlet, JSP, Web Services, EJB, JPA etc.
3) Java ME (Java Micro Edition)
It is a micro platform which is mainly used to develop mobile applications.
It is used to develop rich internet applications. It uses light-weight user interface API.
To learn Java, you must have the basic knowledge of C/C++ programming language.
Our Java programming tutorial is designed to help beginners and professionals.
We assure that you will not find any problem in this Java tutorial. But if there is any mistake, please post the problem in contact form.