Introduction of JAVA

                                              

                                           JAVA

• History

1. 1991- James Gosling- called "OAK".
2. 1995- Developed by Sun Microsystem= Called it "JAVA".

• Sun Microsystem Launched Different Versions Of Java Based on Different Purposes

1. J2SE(Standard Edition)     :- Window based Application
2. J2EE(Enterprise Edition)   :- Web based application
3. J2ME(Mobile Application) :- Mobile based application

NOTE:- When a java file is compiled, a class file is created, A class file is a collection of Byte code.Bytes codes are then interpreted by JVM.

                 Two process done in execution of a java program:-

                      1) Compilation

                      2) Interpretation

Important features of JAVA :- Platform independent
                                                        means write once run  anywhere