Introduction to Java
Java is an object-oriented multi-purpose programming language produced by Sun Microsystems. It was later acquired by Oracle Corporation.There is one thing which distinguishes Java from some other languages is its ability to run the same compiled code across multiple operating systems. This is the important feature in Java.
In other languages, the source code (code that is written by the programmer), is compiled by a compiler into an executable file. This file is in machine language and is intended for a single operating system/processor combination so the programmer would have to re-compile the program separately for each new operating system/processor combination. Java is different in that it does not compile the code directly into machine language code. Compilation creates bytecode out of the source code.