What makes Java Platform Independent

Java is a programming language which is general purpose, robust, secure, platform independent, multi-threaded, concurrent , and secure. Java comes with JDK, JRE and JVM.

JDK is a compiled version of platform dependent set of libraries which you can download from Oracle JavaSE website and install it in your machine to work with Java programming. Basically this comes with set of tools for debugging, compiling and monitoring java applications using JMX. Additionally it also provides JRE which is nothing but a Java Runtime Environment. Java Runtime Environment contains JVM and it basically executes the bytecode which is compiled from the Java Source Code.

Java is a platform independent language but JVM is not platform independent. It is basically a virtual machine which communicates with your local operating system for all kinds of operations we want to execute from Java programs like reading a file, connecting to a network or writing something on the stdout.

java_architecture

We write Java program using any editor, and then use javac provided in JDK to compile the program. Java Compilers generates the class code, which can be executes on the JVM. JVM reads bytecode and converts that into equivalent machine instructions and performs the system call. JVMs are programmed different for each operating system as the system call differs for operating system to control the hardware and so that makes JRE platform dependent and thus it makes java a platform independent programming language which compiles to bytecode which can run on any JVM.

Advertisements

2 thoughts on “What makes Java Platform Independent

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s