What is Java and how to learn it?

You must have heard the name of Java. But this question must have come in your mind that what is Java and how to learn Java Programming Language with it. We will answer this in today’s article and would like to give some more information related to it. 

In today’s time, the demand for programming language is very high. If I tell you an interesting thing, you will be shocked. At present, Java code is used in more than 3000000 electronic devices. From this you can imagine how popular this programming language is.

It is still used in all the smart phones and electronic devices you are using like AC, Oven, Smart TV, Digital Fridge etc. In programming different parts in the equipment of some automated industries also.

If you want to learn Android Programming, then it is very important to learn Java. So let us know What is Java.

What is Java

Java is a General Purpose Programming Language. These are used for software and application development. Java is a high level programming language. It was started by Sun-micro system in 1995.

James Gosling is one of its main developers. This is Platform Independent Language. You can run the code written in it on any platform or OS.

codes are written in English not in numeric codes. Anyone can understand the written codes very easily. That is why it has been included in tough Level Language. It follows the concept of Oops. Fundamentals of C++ language have been used in it.

To write a program, some rules are followed which is called Syntax. Writing a program without syntax leads to errors. Like whenever you write Hindi or English, if you do not follow the rules of grammar then it becomes wrong, similarly it is very important to follow the syntax.

What is the use of Java?

Let us understand what is the use of Java. This Computer Programming Language has only one purpose. Whatever code is written in it should run in all computers.

Whether those two machines are identical or not, I mean, no matter what OS it is (Windows or Mac), for example, code written in C++ never executes the same in another machine. Code written in Windows never runs in Mac OS, but this is wrong in the case of Java.

It is used for creating web based programming and mobile applications and software. All the operating systems of Android like Kitkat, Lolipop, Oreo, all these have been developed with this programming language.

In today’s time, all the web pages run on Java Script. There must be a question in your mind that how the code is executed.

How is Java Program Code Run or Executed?

This language uses a code to run this by help of Abstract Computing Machine , which is called Java Virtual Machine.

Java Virtual Machine

Its short form is JVM. It is a virtual computer help of this all Java programs run. if a program is written, it is called source code. Byte code is generated by compiling this source code with the help of Java Compiler. JVM is used to run this byte code. JAVA Interpreter resides inside JVM and it runs the program.

One thing to know is that JVM is already installed in all the computers that run Java programs. That’s why this code runs in all computers. For this reason Java is a Platform Independent Language.

All other programming languages ​​have compilers that produce code. They are generated for the same system and run in the same system. But the byte code that the Java compiler generates is for JVM.

Because JVM is present in the entire system, this program runs in every computer. This makes the Virtual Machine code capable of running in the operating system.

Platform Independent

From its name itself you might have understood that it does not depend on the platform. Here Platform means OS. Like Windows, Linux, Mac, Android.

When we write programs or create any software, they all run on OS platform. But there are some programs which run only on one computer and OS, such programs are called Platform Dependent Programs. If there is any program whose code runs on all other platforms (to run means to run). So it is called Platform Independent Code.

This means that Java is a programming language whose code runs on all cross-platforms. whene “Write Once Run Any Where”. So let us now talk about where it is used and what is its use.

What was the purpose of creating JAVA

You must be aware of all the programming languages ​​that exist and were there earlier. They follow all the procedural structures. After this came the Object Oriented concept. I am happy that in today’s time Object Oriented has changed the entire Programming Industry.

You might be thinking that although there are already so many computer languages, what is special about it? In recent times, you must be aware of how much Internet Applications are in demand. Be it online video/image editing, or converting something online like creating Word to PDF, ZIP, RAR file, all this is because of it.

Nowadays filling online form, online calculator, all this has become possible only with the help of java. In Internet, Java works together with other web based languages. It means clearly that it has been created to develop Internet Applications and Tools. If we compare it with other languages, it is easily executed on the Internet. It is also very easy to write programs in it.

A powerful web application can be created with the help of Java Script, JSP (Java Server Pages) and java. You can easily implement java applets in the web. With its help, you can also write offline programs which run even without Internet.

I would like to give you this advice now and in the future, if you want to do something in the world of SW then definitely learn it and how to learn this language, further information about this will also be available to you in this article. By now you know a lot but you should also know about its history.

History Of Java

Its history is very interesting, so it is very important for you to know it. It started with Green Team. The members of Java team is known as Green Team.

The only objective of this team was to create a language that could be used to program electronic devices like set-top boxes, television.

But it later proved to be more helpful for the Internet. After some time this technology got integrated with NetScape.

James Gosling

James Gosling is one of the leading developers of JAVA. Nowadays, Java is used for Internet Programming, Mobile Devices, Games, E-Business solutions.

the Java Language Project is started by James Gosling, Mike Sheridan, and Patrick Naughton in 1991. He had formed a team of engineers to work on this project, the name of that team was Green Team. The coding of this language is written in C.

James Gosling named this language Green Talk and the file extension was gt. after its name was changed to Oak.

Why was it named Oak?

Oak is also called a symbol of strength. Oak is the national tree of Western Countries (USA, France, Germany, Romania). In 1995, the name Oak was changed to Java, because Oak was already a trade mark of Oak Technologies Company at that time. Now the next question is, why is its name Java and not some other name?

Why was it named JAVA?

When the Green Team was collectively selecting the language name. All those team members gave suggestions of some names like Dynamic, Revolutionary, Silk, Jiot, DNA.

They wanted a name that would represent their technology. A name which is Revolutionary, Dynamic, Lively, Cool, Unique. According to James Gosling, in the end there were two name suggestions, one was Silk and the other was JAVA. Green Team found the name JAVA quite unique and ultimately this name was kept.

Java is the name of an island that is present in Indonesia. Where coffee was first produced. It was developed in Sun MicroSystem. Currently it is a part of Oracle Corporation. JDK 1.0 was launched in January 1996.

History of Java Version

Over time, different versions of JAVA were released and their information is given below.

  • JDK Alpha and Beta (1995)
  • JDK 1.0 (23 Jan, 1996)
  • JDK 1.1 (19 Feb, 1997)
  • J2SE 1.2 (8 Dec, 1998)
  • J2SE 1.3 (8 May, 2000)
  • J2SE 1.4 (6 Feb, 2002)
  • J2SE 5.0 (30 Sep, 2004)
  • Java SE 6 (11 Dec, 2006)
  • Java SE 7 (July 28, 2011)
  • Java SE 8 (18 March, 2014)

Where is Java used?

At present, more than 3 Billion devices run with the help of Java. It is a highly used programming language in the IT industry.

JSP – This is a Web Technology, it is used in Web applications. With the help of JSP, Java Code is inserted into the HTML Document. JSP tag is used to insert Java code in HTML tag. With its help, Dynamic Web Pages are created. PHP-You must know that it is a server side scripting language. Java has also been used in PHP.

Applets – This is also a kind of Full Java program. Which is added inside the web page. Due to which new features can be seen in the web browser. Applets reside within HTML. Some online games are also examples of Applets. Plugins are required to run applets in a web browser.

J2EE – Java 2 Enterprise Edition is a Platform Independent Environment. With the help of which Web based Enterprise Applications are created. Web applications created by J2EE are used to share XML based structured data among companies.

JavaBeans – It is similar to Visual Basic. New and advanced applications are created with the help of already existing components. In this, many objects are kept in one object which is called Bean.

Mobile – Despite all the technologies mentioned above, this language has a great contribution in mobile devices. It completely changed the game industry.

Types of Java Applications

Web Application

Means to develop server side web application. Nowadays, Servlet, JSP, Struts, JSF all are used to create web applications.

Standalone Application

This means desktop application and mobile application. These are the software that we use every day. Example:- Media Player, Antivirus, MS-Office, Browsers. Standalone applications are easily created with the help of AWT and SWING.

Enterprise Application

Java is the only programming used to create many enterprise applications. Because it provides high level security. EJB (Enterprise Java Bean) is used to create all types of Enterprise Applications like banking software, Industry application, accounting application.

Mobile Application

You must be knowing about this that all the games and applications you run in mobile are made in this language. All the apps in Google Playstore are developed with Java programming.


Object Oriented – Everything in Java is Object Oriented. With the help of Object Model, apps/sw with long code can be easily created.

Platform independent – ​​This is a special language in which software written can run in all operating systems. Which is also called Cross Platform. But if we talk about C and C++ then both of them are platform dependent languages.

  • Simple – You can understand it easily and can write it easily, this is its quality. That is why it is called simple. If you have understood the basic concepts of Oops, then no one can stop you from becoming a master in Java.
  • Secure – It is very popular because of its security feature. Can develop Virus Free, Tamper Free System software. Public Key Encryption is used in Authentication Technique.
  • Architectural-neutral – The code generated by the compiler is byte code. The code which you can run anywhere, in any operating system and processor. That is why it is being called Architectural Neutral. For this it is mandatory to have JVM which is present in all systems.
  • Portable – It is also portable because of Platform Independent. Because both Java and Compiler are written in ANSI C.
  • Robust – All the programs written in it are robust. Strong does not mean as strong as iron. When the program is run there is no error in it. Because Compile Time and Run time Error checking mechanism is used.
  • Multi-threaded – Because of these features you can write programs that can perform multiple tasks. Meaning there will be one application and you can do all the tasks in it.
    High Performance – Due to Just in Time Compilers, the performance of java is quite good.
  • Distributed – Because of this nature, the Internet maintains its status in the distributed environment.
  • Dynamic – This is Dynamic Programming. It can adapt to any environment.

Different Editions of Java Technology in Hindi

Java SE –Java SE or Java Standard Edition provides you the tools and API to create Server Applications, Desktop Applications and applet programs. All the programs written with the help of Java SE run in all operating systems. Like Linux, Windows, Mac.

JEE – (java Enterprise Edition) web application Services, Component model, Enterprise Class Service Oriented Architecture (SOA)

JME – Java Micro Edition or JME is a collection of APIs. They are used to develop Mobile Phones applications, PDAs, TV Set-Top Box software, Gaming Programs. The interface of micro edition platform is quite user friendly. Besides, it is trustworthy. Security Model provides the facility of different types of Built in Network in which you can run Java Based Application in it.

What is required to run Java in computer?

  1. First of all, download Java software development kit from this link http://java.sun.com/
  2. Follow whatever instructions are given in the website.

Java Editors for writing Java Programs

You will need editors to write Java programs and you can use the editors given below.

  1. Notepad++ is an editor in which you can easily write code. It is easy to find errors and also to find missing brackets.
  2. Netbeans – This Java IDE is open source and free. Which you can download from this link http://www.netbeans.org/index.html
  3. Eclipse – This is also a java IDE which has been developed by the eclipse open source community. You download it from this link http://www.eclipse.org

How to learn Java

According to the demand of programming, if you know the fundamentals of programming then you should learn java.

Because you can earn income in lakhs by developing software and making apps in play store. That’s why my advice is that you can learn easily by watching video series from some tutorial sites or YouTube.

Below is a list of some channel names and websites from where you can learn Java.

Names of tutorial sites to learn JAVA


My final opinion on this article

This information is more useful for special students. In today’s article you will learn what is java . You also got answers to these questions: What is the use of this programming language?

History means you must have known the history of java. The most important question which you people always ask is How to learn Java and Characteristics Features of java which come in special exams. How many types of applications can you develop with Java Language? You have got the knowledge of everything.

Greetings, fellow enthusiasts of entrepreneurship, technology, and the art of earning a living! I'm Rashid Naseem, a passionate blogger dedicated to unraveling the mysteries of business, sharing innovative ideas, and exploring the ever-evolving landscape of technology.

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