Java was designed and conceived by James Gosling, Patrick Naughton, Chris Warth, Ed Frank and Mike Sherdan, which was done at Sun Microsystems in year 1991.
It took almost 18 months for java to come into existence as a working version.
Initially java was known as “Oak”, which was then renamed as “Java” in year 1995. Since java had much had much of its character designed from C and C++.
This character inherited by the two well known and simple programming makes java more appealing to computer and it giants which would lead to a large scale success.
But java is misunderstood as the sophisticated internet version representation of C++.
It has significant difference practically and philosophically when compared to C++.
If you have good knowledge in C++ then you will find java as your cup of tea and you will at ease using and understanding java.
Therefore, there are two main reasons for the evolution of the computer languages. Java had enhanced and refined the object oriented scenario of C++. This gave more features to the users which are as follows:
Multithreading.
Library which would provide easy internet access.
One of the java’s magic was the byte code. Byte code is set of instruction which is highly optimized and designed to be executed by JVM (Java Virtual Machine). It is an interpreter for byte code. This lead to the design of truly portable programs.
Java redesigned the internet with new feature and networked program which are as follows:
Applets - It is a kind of java program that is to be transmitted over and executedautomatically by java compatible web browsers.
Security - It provided the security of downloading various applets and programs from internet without containing any virus or Trojan horses.
Portability- Since there is large and different kind of operating systems therefore it provides the freedom of running in any operating system so its program can be used in different OS without any issues of compatibility.
The evolutions in java are as follows:
Java 1.0
Java 1.1
Java 1.2
J2SE
J2SE 1.2
J2SE 1.3
J2SE 1.4
J2SE 5
J2SE 5 made various changes to Java
The new feature that was added is as follow:
Generics
Annotations
Auto boxing and auto-unboxing
Enumerations
Enhanced, for-each style for loop
Variable-length arguments
Static import
Formatted I/O
Concurrency utilities
In J2SE 5, and the developers kit was called JDK 5. 1.5 used as internal version numberand this is referred as developer version number.Java became the center of innovation in computer technological world. The existence ofJVM and byte code changed the scenario of security and portability in the programmingworld. The way the new ideas are put into the language has been redefined by the JCP i.e.java community process.
