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Java Virtual Machine (JVM)

By: Preeti Preeti
 

Java is an object oriented programming language developed by Sun Microsystems. This is freely available to public for all purposes from personal website development to big enterprises. It looks lot like C and C++ but has various extra-developed features that make it safer, easier and more useful than other object oriented languages. It is now most demanded programming skill used for developing various web-based application in e-commerce and universities.
The most important feature of Java is that it can run on different types of computer without any modification. This feature is popularly known as “Write once, run anywhere”. Again, it is used widely with Server Side web programming, where the program runs on the web server and the user can see the page using any web browser. Also programs developed by using Java technology can be sold without paying or consulting to the Sun Microsystems.
Java Virtual Machine (JVM)
It is the principal component of Java architecture that provides the cross platform functionality and security to Java. This is a software process that converts the compiled Java byte code to machine code. Byte code is an intermediary language between Java source and the host system.
Most programming language like C and Pascal translate the source code into machine code for one specific type of machine as the machine language vary from system to system. So most complier produce code for a particular system but Java compiler produce code for a virtual machine. The translation is done in two steps. First the programs written in Java or the source code translated by Java compiler into byte code and after that the JVM converts the byte code into machine code for the computer one wants to run.

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