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Java Features

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The concept of Write-once-run-anywhere (known as the Platform independent) is one of the important key feature of java language that makes java as the most powerful language.

Java Features

     

Platform Independent
The concept of Write-once-run-anywhere (known as the Platform independent) is one of the important key feature of java language that makes java as the most powerful language. Not even a single language is idle to this feature but java is more closer to this feature. The programs written on one platform can run on any platform provided the platform must have the JVM. 

Simple
There are various features that makes the java as a simple language. Programs are easy to write and debug because java does not use the pointers explicitly. It is much harder to write the java programs that can crash the system but we can not say about the other programming languages. Java provides the bug free system due to the strong memory management. It also has the automatic memory allocation and deallocation system.

Object Oriented
To be an Object Oriented language, any language must follow at least the four characteristics.

  • Inheritance   :   It is the process of creating the new classes and using the behavior of the existing classes by extending them just to        reuse  the existing code and adding the additional features as needed.
  • Encapsulation:  :   It is the mechanism of combining the information and providing the abstraction.
  • Polymorphism:   :   As the name suggest one name multiple form, Polymorphism is the way of providing the different functionality by the 
       functions  having the same name based on the signatures of the methods.
  • Dynamic binding  :   Sometimes we don't have the knowledge of objects about their specific types while writing our code. It is the way     of providing the maximum functionality to a program about the specific type at runtime.  
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As the languages like Objective C, C++ fulfills the above four characteristics yet they  are not fully object oriented languages because they are structured as well as object oriented languages. But in case of java,  it is a fully Object Oriented language because object is at the outer most level of data structure in java. No stand alone methods, constants, and variables are there in java. Everything in java is object even the primitive data types can also be converted into object by using the wrapper class.

Robust
Java has the strong memory allocation and automatic garbage collection mechanism. It provides the powerful exception handling and type checking mechanism as compare to other programming languages. Compiler checks the program whether there any error and interpreter checks any run time error and makes the system secure from crash. All of the above features makes the java language robust.

Distributed
The widely used protocols like HTTP and FTP are developed in java. Internet programmers can call functions on these protocols and can get access the files from any remote machine on the internet rather than writing codes on their local system.

Portable
The feature Write-once-run-anywhere  makes the java language portable provided that the system must have interpreter for the JVM. Java also have the standard data size irrespective of operating system or the processor. These features makes the java as a portable language.

Dynamic
While executing the java program the user can get the required files dynamically from a local drive or from a computer thousands of miles away from the user just by connecting with the Internet.

Secure
Java does not use memory pointers explicitly. All the programs in java are run under an area known as the sand box. Security manager determines the accessibility options of a class like reading and writing a file to the local disk. Java uses the public key encryption system to allow the java applications to transmit over the internet in the secure encrypted form. The bytecode Verifier checks the classes after loading. 

Performance
Java uses native code usage, and lightweight process called  threads. In the beginning interpretation of bytecode resulted the performance slow but the advance version of JVM uses the adaptive and just in time compilation technique that improves the performance. 

Multithreaded
As we all know several features of Java like Secure, Robust, Portable, dynamic etc; you will be more delighted to know another feature of Java which is Multithreaded.
Java is also a Multithreaded programming language. Multithreading means a single program having different threads executing independently at the same time. Multiple threads execute instructions according to the program code in a process or a program. Multithreading works the similar way as multiple processes run on one computer.  
Multithreading programming is a very interesting concept in Java. In multithreaded programs not even a single thread disturbs the execution of other thread. Threads are obtained from the pool of available ready to run threads and they run on the system CPUs. This is how Multithreading works in Java which you will soon come to know in details in later chapters.

Interpreted
We all know that Java is an interpreted language as well. With an interpreted language such as Java, programs run directly from the source code. 
The interpreter program reads the source code and translates it on the fly into computations. Thus, Java as an interpreted language depends on an interpreter program.
The versatility of being platform independent makes Java to outshine from other languages. The source code to be written and distributed is platform independent.  
Another advantage of Java as an interpreted language is its error debugging quality. Due to this any error occurring in the program gets traced. This is how it is different to work with Java.

Architecture Neutral
The term architectural neutral seems to be weird, but yes Java is an architectural neutral language as well. The growing popularity of networks makes developers think distributed. In the world of network it is essential that the applications must be able to migrate easily to different computer systems. Not only to computer systems but to a wide variety of hardware architecture and Operating system architectures as well.  The Java compiler does this by generating byte code instructions, to be easily interpreted on any machine and to be easily translated into native machine code on the fly. The compiler generates an architecture-neutral object file format to enable a Java application to execute anywhere on the network and then the compiled code is executed on many processors, given the presence of the Java runtime system. Hence Java was designed to support applications on network. This feature of Java has thrived the programming language.

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Posted on: February 25, 2008

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Comments
makvana ajit
April 8, 2011
java

what is java?
sajna.v
July 6, 2011
featuers of java

thanx
janardan
June 17, 2011
Java

Servlet is nothing , it is just a java program inside HTML codes JSP is nothing just html codes inside java code
venu
June 4, 2013
java features

good
soumya sourav
September 14, 2011
on java

these are all the feature of java or any thing else are there
srinivas
September 16, 2011
java,c,c++,oracle,.net

no
Banwari lal natwadiya
September 16, 2011
BCA

Thanks
mayur
May 18, 2013
java

pleasehelp
raj
September 20, 2011
java

it was good,cnt get too much stuff in a single book
amar
October 4, 2011
java

the most powerful language.
Suresh
October 10, 2011
Congratulations!

Thankyou Guys. Your explanations are very good.
kishor
February 22, 2013
java

I like the information which is given for the java and it is understandable.
momin vazeer
November 26, 2011
features of java

please sir, help me
ruby
December 2, 2011
java

features
abdul kadir.k
December 8, 2011
mini project

string
Rinkey Kumari
December 14, 2011
ADVANCED JAVA

avvanced java is the new and latest version which is mainly used in the industry.
tiya
December 16, 2011
java

gud job !!!! dis info is useful 4 me 10x !!!
rahul
December 21, 2011
java

superb, fantastic thank u so much
udit
April 10, 2012
java

thanks
rina kumari
May 8, 2012
ohbbchj

best hai
srinivasan.g
May 24, 2012
java

any way
ganesh nivarkar
May 24, 2012
java

very nice notes
sindhuja
July 17, 2012
usage

i can able to understand
Vinod
August 9, 2012
Java Features

Features are explained in a very good manner.
shikha
August 17, 2012
java assignment

thanks its really helpful for me..
trupti ranjan sahoo
August 17, 2012


can inheritance property use in java programming ?
rajesh s
October 8, 2012
java

hi i am study in mca second year i am chose java language how to value in feature
manoj
November 8, 2012
java

siple and good
same
November 30, 2012
same12345abcd

java
valentino abiuty
December 1, 2012
java

its good, because i got what i need thanks a lot
kathiravan
October 9, 2013
MCA

thank you..
pari sharma
November 3, 2013
java

nice n thanks to put features .
kiran paghal
January 8, 2014
IT

WHY JAVA CALLAED OBJECCT ORIENTED ?
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