HISTORY OF JAVA

       In simple Java is an Object-oriented programming language created by Sun Microsystem in 1991. Java programming language is written by the Green Team lead by James Gosling along with the two person 'Mike Sheridan' and 'Patrick Naughton', while they were working at Sun Microsystems. Initially it was named oak Programming Language. The first version of Java aimed at programming home appliances which are controlled by a wide variety of computer processors. It was the advanced concept at that time. Currently Java is used in internet programming, games, mobile etc.

                                                 JAMES GOSLING

        The target of Java is to write a program once and then run this program in multiple operating system. The first publicly available version of Java (Java 1.0) was released in 1995. Sun Microsytem was acquired by the Oracle Corporation in 2010. 

        James Gosling was firstly named as "GREENTALK" and file extension was  .gt. After that it was called by oak. In 1995 Oak was renamed as Java. Java was started as a project called "Oak" by James Gosling in June 1991. Gosling's goals were to implement a virtual machine and a language that had a familiar to C, like notation but with greater uniformity and simplicity than C and C++. Java 1.0 made the promise of " Write once, Run anywhere".

Primary goals in the creation of the Java languages are :

1- It should use the object-oriented programming methodology.

2- It should allow the same program to be execute on multiple operating system.

3- It should be designed to execute code from remote sources securely.

4- It should be easy to use.

5- It should contain built-in support for using computer network.

        The Java syntax is similar to C++. Java is case sensitive. For example variable called 'Value' and 'value' are treated as different variables. 

JAVA VERSIONS

        The Java languages has undergone several changes since JDK 1.0. The Java Development Kit (JDK) is a software development environment used for developing Java applications and Applets. It include Java Runtime Environment (JRE), an interpreter/loader (Java), a compiler (Javac), an archiver (jar), a document generator (javadoc) and other tools in Java development.

        The Java languages has several changes since JDK 1.0 as well as numerous addition of classes and packages to the standard library. Versions of Java and released year are follows.

• JDK Beta                -         1995
• JDK 1.0                  -         1996
• JDK 1.1                  -         1997
• J2SE 1.2                 -         1998
• J2SE 1.3                 -         2000
• J2SE 1.4                 -         2002
• J2SE 5.0                 -         2004
• Java SE 6                -         2006
• Java SE 7                -         2011
• Java SE 8                -         2014

JDK EDITIONS

• Java Standard Edition (J2SE) : J2SE can be used to develop client-side standalone applications or applets. It contains JDK and API for Windows applications. It is core part of Java.
• Java Enterprise Edition (J2EE) : J2EE can be used to develop server-side applications such as Java Servlets and Java Server Pages. It contains API that are used for building large web centric distributed applications.
• Java Micro Edition (J2ME) : J2ME can be used to develop applications for mobile devices such as cell phones and portable devices.