what is the java?|learn java free in one page,


What is the java?
What is java programing Is it used for?
History of java  
Why need to invent java?
Many features of java
What need java to run in your pc? 
Simple java tutorial (two hr video leature)



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what is the java? 
What is the java?

Java is one general computer program language, if you want to know what is the java is? then it is object-oriented language, which invents in us by gosling in 1991, the first name of java is oke but after change its name as java,

Gosling invent this language to write a program for TV, VCR, etc… this is the best computer language in today century,



To know what is the java? the video lecture click here  

In 21st century all are in finger!! Mean you can do anything with the help of your finger, I asking about mobile, and mobile run with android and it is run with java so what is the java?


We humans talk with others with the help of language, the animal also has their own language, but if we talk about the machine than machines have any language? How they communicate with each other?

Human-made machine, he give order to a machine but at first machine not understand so human work physical, but after invent new technology human give order to the machine, but problem is that this machine does not understand human language,

But we are human, we have a solution for every problem, so human invent machine language, in the first time when we invent machine language human give many examples, but in the 21st century when human try to talk two the machine than within a 4 second this tow machine invent their own language

We invent the machine, and the human child learns to speak about to more than three years, but this machine learns this language only in 4 seconds, so think how the fast is?  

Java just one computer language, which can use to write the program, machine or anything,

If you are run mobile software, then you have a question that how this software work? What is the java? How computer program is work? Talk about humans how we speak? And how can we talk with others? We have language so we can understand each other,

Same way human invent the computer, but after inventing the machine we work physically because this machine does not understands human so it need to invent a new language of the machine,


Java is a computer-based program language, that use in any machine made by a human, you can say that it is one language, with help java we can talk with a machine.

The men who invent this connection between human and the machine is James Gosling. So Java is invented by James gosling and sun microsystem in 1991. So in 1991 born a new world, it’s call machine world,  


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java basic history 


Why need to invent java?


Before java different, different the language used by computer developer, but the problem is that different computer has its own language, like we human, is a different language, the animal has a different language, bird has its own language,

We do not understand animal and bird language, but in feature may happen that some type of machine can change every living creature in some of those forms that can understand by everyone,

The same way Mr. James Gosling think about this problem and he invents the language of inter commutation between two the computer, before inventing java program write for every computer,

Meantone program like a calculator write for one computer than if you run on another computer then you write again because it is different for another computer, it is very time consuming and boring,


Father of Java James Gosling invent Java and this language is known as inter commutation language of computer because if we write one program it runs anywhere in the machine

Or you can say that motto to write Java is “write once run anywhere “


By the way, Java is not its first name, the First name is oke, but this name is pattern already so it is necessary to change the name, so oke is changed its name in 1995 as java 


You know the team that invents this language java? The first team who invert this Java language is known as the green team,


Basically, it is used for electronic devices, write a program for the machine so human no need for more physical work,


This language in invent for write program, But then this language is best for internet because it runs anywhere that we want, easy to write, easy to understand,


The first name is the green talk in which they made,

Java languages for a run this java program, no need any hardware or operating system,
The first version of java is JDK 1.0, and the latest variation of java is java se 8 release on 18 March 2014,

Java is object-oriented program language, that means any java understand every program as an object, not a language,


Many features of java


It is object-oriented

          Java take any program as an object so it's run any system, in this java all information is stored in an object,

It is work as a compiler and interpreter,

          Most of the program has only one feature it is the compiler of it is interpreter, but java has both of feature,


It is a platform independent and portable

          It means that java program is run anywhere in any system,


 Very secure

Java is very secure because java program is run in any technology, while any other language not run in any system, sometimes it is crash, and it is very disappointing for any program developer,

Because for write one program it takes month or year, and if it is not run in another system than all hard work is failing, major disappointment,

But in java JVM is delete some invalid groups of code, when we run in JVM if is very easy to run

It is also distributed,

Java is very easy because application which writes in java can run in any network and may work with a combine, By use of this language in program development, this program is easy to run in any network, different classic and method of java have to classify the URL, and other data that any program need,



Java= simple and familiar

          Java is one simple, some of the java features are taken form c++ and c

It is multi-tasks completion,

          Java can fun more than one program at a time, this feature make java very fast and non-irritating

High performance
         
          Java has a very impressive result in any system, due to its bite code,

Last but not the list is that it is easy to develop,     



What need java to run in your pc?


JDK
          Java development kit, this is the software you find in online, it is one type of blank book in which we write a java program, in JDK we can execute any program,
JRE
          It is on type of execution propose, java program need one execution to make easy environment to read a program and run a java program,  

JVM
What is JVM?
Jvm = java virtual machine, it means that it machine generates the same bit code that why the program can run in any system like a window, IS, linex, etc … 

For java language programmer writer, you must need this software on your computer, first search java JDK in Google and install the first link, it is the latest variation, variation 11 it is run only 64 bits, so you must check your system

How can you check your the system is 64 bits?

Go to this pc, 
Right-click and go to properties
So you know, that what your system, 

If your system is 32 bits then download other software, 

Simple java tutorial



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free java code


Public class hellojava
{
          Public static void main(straing args[])
          {
                   System.out.println(“this is world of knowledge”)
          }
}

 It is output is this is a world of knowledge,

Simple java tutorial

Public class hellojava
{
          Public static void main(straing args[])
          {
                   System.out.println(“type your name”)
          }
}
Output display your name


Simple java tutorial

Public class hellojava
{
          Public static void main(straing args[])
          {
                   System.out.println(“save earth”)
          }
}

Output = save earth

here you know what is the java? and is history, feature, and basic tutorial, and free course of java, just scan this code, 


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