This section introduces you with JAVA. Java is an Object Oriented Programming similar to C++ and Smalltalk. But JAVA is platform independent and follows the principle of WORA ( Write Once and Run Anywhere). It is unlike C, C++ which means that you write a JAVA program and compile it only once and run it on any operation system be it Windows, Linux, Solaris etc. If we talk about C++ then it is not all platform independent because needs to be compiled on each operation system in order to execute the program on different operation system. We will discuss this in detail in section Java Virtual Machine that how it achieve such a platform independence where as C, C++, FORTRAN, VB, VC++ and many others.