Features of Java:

Features of Java:

In  Java Programming language we introduce with some keyword like Object-oriented, Simple, Portable Platform independent  etc.  Yes! These are feature of Java. There are many features in Java. They are also known as java buzzwords. The main features of Java are:

• Simple
• Object-Oriented 
• Portable  
• Platform independent 
•  Secured 
•  Robust 
• Architecture-neutral
•  Dynamic 
•  Interpreted 
•  High Performance 
•   Multithreaded 
•  Distributed

The Java Features are given below in detail.

Simple

Java is easy to learn and its syntax is quite simple, clean and easy to understand. The confusing and ambiguous concepts of C++ are either left out in Java or they have been re-implemented in a cleaner way. No need to remove unreferenced objects because there is Automatic Garbage Collection in java.

E.g.: Pointers and Operator Overloading are not there in java but were an important part of C++.

 

Object-oriented

Object-oriented means we organize our software as a combination of different types of objects that incorporates both data and behavior.

Object-oriented programming (OOPs) is a methodology that simplifies software development and maintenance by providing some rules.

Basic concepts of OOPs are:

* Object *  Class *  Inheritance * Polymorphism * Abstraction * Encapsulation

Platform Independent

A platform is the hardware or software environment in which a program runs.

There are two types of platforms software-based and hardware-based. Java provides software-based platform.

The Java platform differs from most other platforms in the sense that it is a software-based platform that runs on the top of other hardware-based platforms. It has two components:

1. Runtime Environment
2. API(Application Programming Interface)

Java code can be run on multiple platforms e.g. Windows, Linux, Sun Solaris, Mac/OS etc. Java code is compiled by the compiler and converted into bytecode. This bytecode is a platform-independent code because it can be run on multiple platforms i.e. Write Once and Run Anywhere (WORA).

Secured

When it comes to security, Java is always the first choice. With java secure features it enable us to develop virus free, temper free system. Java program always runs in Java runtime environment with almost null interaction with system OS, hence it is more secure.

Java is secured because:

• No explicit pointer
• Java Programs run inside virtual machine sandbox 
• Classloader: adds security by separating the package for the classes of the local file system from those that are imported from network sources.

• Bytecode Verifier: checks the code fragments for illegal code that can violate access right to objects.
• Security Manager: determines what resources a class can access such as reading and writing to the local disk.

These securities are provided by java language. Some security can also be provided by application developer through SSL, JAAS, Cryptography etc.

Robust

Robust simply means strong. Java uses strong memory management. There are lack of pointers that avoids security problem. There is automatic garbage collection in java. There is exception handling and type checking mechanism in java. All these points make java robust.

Architecture-neutral

Compiler generates bytecodes, which have nothing to do with particular computer architecture; hence a Java program is easy to interpret on any machine

There are no implementation dependent features e.g. size of primitive types is fixed.

Portable

Java Byte code can be carried to any platform. No implementation dependent features. Everything related to storage is predefined, example: size of primitive data types

High-performance

It has high performance because of following reasons;

• This language uses Bytecode which is faster than ordinary pointer code so Performance of this language is high.
• Garbage collector, collect the unused memory space and improve the performance of the application.
• It has no pointers so that using this language we can develop an application very easily.
• It support multithreading, because of this time consuming process can be reduced to executing the program.

Distributed

We can create distributed applications in java. RMI and EJB are used for creating distributed applications. We may access files by calling the methods from any machine on the internet.

Multi-threaded

A thread is like a separate program, executing concurrently. We can write Java programs that deal with many tasks at once by defining multiple threads. The main advantage of multi-threading is that it doesn't occupy memory for each thread. It shares a common memory area. Threads are important for multi-media, Web applications etc.