Java Tutorial
Control Statements
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Java Control Statements
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Java If-else
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Java Switch
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Java For Loop
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Java While Loop
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Java Do While Loop
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Java Break
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Java Continue
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Java Comments
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Java Programs
Java Object Class
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Java OOPs Concepts
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Naming Convention
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Object and Class
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Method
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Constructor
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static keyword
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this keyword
Java Inheritance
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Inheritance(IS-A)
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Aggregation(HAS-A)
Java Polymorphism
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Method Overloading
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Method Overriding
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Covariant Return Type
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super keyword
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Instance Initializer block
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final keyword
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Runtime Polymorphism
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Dynamic Binding
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instanceof operator
Java Abstraction
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Abstract class
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Interface
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Abstract vs Interface
Java Encapsulation
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Package
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Access Modifiers
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Encapsulation
Java Array
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Java Array
Java OOPs Misc
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Object class
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Object Cloning
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Math class
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Wrapper Class
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Java Recursion
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Call By Value
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strictfp keyword
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javadoc tool
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Command Line Arg
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Object vs Class
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Overloading vs Overriding
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Java String
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Java Regex
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Exception Handling
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Java Inner classes
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Java Multithreading
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Java I/O
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Java Networking
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Java AWT & Events
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Java Swing
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JavaFX
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Java Applet
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Java Reflection
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Java Date
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Java Conversion
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Java Collection
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Java JDBC
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Java Misc
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Java New Features
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RMI
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Internationalization
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Interview Questions
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Java MCQ
Our core Java programming tutorial is designed for students and working professionals. Java is an object-oriented, class-based, concurrent, secured and general-purpose computer-programming language. It is a widely used robust technology.
What is Java?
Java is a programming language and a platform. Java is a high level, robust, object-oriented and secure programming language.
Java was developed by Sun Microsystems (which is now the subsidiary of Oracle) in the year 1995. James Gosling is known as the father of Java. Before Java, its name was Oak. Since Oak was already a registered company, so James Gosling and his team changed the name from Oak to Java.
Platform: Any hardware or software environment in which a program runs, is known as a platform. Since Java has a runtime environment (JRE) and API, it is called a platform.
Java Example
Let’s have a quick look at Java programming example. A detailed description of Hello Java example is available in next page.
class Simple{
public static void main(String args[]){
System.out.println("Hello Java");
}
}
Application
According to Sun, 3 billion devices run Java. There are many devices where Java is currently used. Some of them are as follows:
- Desktop Applications such as acrobat reader, media player, antivirus, etc.
- Web Applications such as irctc.co.in, javatpoint.com, etc.
- Enterprise Applications such as banking applications.
- Mobile
- Embedded System
- Smart Card
- Robotics
- Games, etc.
Types of Java Applications
There are mainly 4 types of applications that can be created using Java programming:
Standalone applications are also known as desktop applications or window-based applications. These are traditional software that we need to install on every machine. Examples of standalone application are Media player, antivirus, etc. AWT and Swing are used in Java for creating standalone applications.
An application that runs on the server side and creates a dynamic page is called a web application. Currently, Servlet, JSP, Struts, Spring, Hibernate, JSF, etc. technologies are used for creating web applications in Java.
An application that is distributed in nature, such as banking applications, etc. is called an enterprise application. It has advantages like high-level security, load balancing, and clustering. In Java, EJB is used for creating enterprise applications.
An application which is created for mobile devices is called a mobile application. Currently, Android and Java ME are used for creating mobile applications.
Java Platforms / Editions
There are 4 platforms or editions of Java:
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.
It is an enterprise platform that is mainly used to develop web and enterprise applications. It is built on top of the Java SE platform. It includes topics like Servlet, JSP, Web Services, EJB, JPA, etc.
It is a micro platform that is dedicated to mobile applications.
It is used to develop rich internet applications. It uses a lightweight user interface API.
Prerequisite
To learn Java, you must have the basic knowledge of C/C++ programming language.
Audience
Our Java programming tutorial is designed to help beginners and professionals.
Problem
We assure that you will not find any problem in this Java tutorial. However, if there is any mistake, please post the problem in the contact form.
Do You Know?
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What is the difference between JRE and JVM?
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What is the purpose of JIT compiler?
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Can we save the java source file without any name?
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Why java uses the concept of Unicode system?
What will we learn in Basics of Java?
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History of Java
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Features of Java
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Hello Java Program
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Program Internal
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How to set path?
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Difference between JDK,JRE and JVM
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Internal Details of JVM
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Unicode System
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Operators