JAVA was developed by Sun Microsystems and released in
1995. It runs on variety of platform such as Mac OS, Windows, and the various
versions of UNIX. It was initiated by James Gosling. JAVA is one of the most
powerful and object oriented programming language.
Latest release of the Java is Java SE 8. Java guaranteed
‘to Write Once, Run Anywhere’.
Below are the key features which make it different from
1.Simple: If you aware about oops concept then it is very
easy to use. It is designed to be easy to learn. Its syntax is based on C++.
All the confusing or rarely used key word has been
removed. Like explicit Pointers. There is an automatic garbage collection in
java so there is no need unreferenced the object.
(As variable declare for datatype similarly object is
created for class, enum, structure etc.)
2.Secure: It have various feature which makes him virus
free and tamper free system.
For example : there is no explicit Pointer.
Security Manager: it makes sure that object of a class
can access legal resources to read and write into the disk
It runs inside
Bytecode Verifier:It has feature as bytecode Verifier to
check illegal code that can violate access right to the object.
Classloader:It separate the class object with the local
file system from those that are imported network sources.
3.Platform Independent: when program under java compiled,
it is not complied into specific machine rather than platform independent byte
code. This code is computed over the web and interpreted by the Virtual Machine
(JVM) on whichever platform it is being run on.
A platform can be hardware or software environment for
which program need to be runs. It is the software based platform which Is
better than any other hardware based platforms.
It is having components:
4. Architecture-neutral – compiler of the java generates
an architecture-neutral object file format, which helps the compiled code
executable on many processors.
5. Dynamic: It is more dynamic as compare to any other
language as it is designed to adopt evolving environment.
6. Distributed − It is designed for the distributed
environment of the internet.
We can easily create distributed applications in java.
(Remote Method Invocation )RMI and (Enterprise Java Beans) EJB are used for creating distributed
applications. We access files by calling the methods from any machine on the
7. High Performance – it uses Just-In-Time compilers as
C#, for enables high performance. Since bytecode is "close" to native
8. Interpreted – Both the process compilation and
interpretation is done for java program. Once java program compiled it is
converted to bytecode(which is not the native code.) Then according to machine
or computer it is interpreted and converted to machine language which is called
as native code.
9. Portable – As java is architecture-neutral and have no
implementation dependent aspects of the specification makes Java portable.
10. Robust – Robust means sturdy in construction. Sturdy
means powerful. Java makes an effort to eliminate error by emphasizing mainly
on compile time error checking and runtime checking. As it uses strong memory
management. There is no pointers concept that avoids security problem. Java has
automatic garbage collection in java. Exception handling and type of checking
mechanism in java. All these points make java powerful.
11. Multithreaded – Java has multithreaded feature. We can
write programs that perform many tasks simultaneously. Multithreaded feature
allows the programmer to construct interactive applications that can run