Features of java

*) Features of java

     *) Simple

     *) Object-Oriented

     *) Distributed

     *) Interpreted

     *) Robust

     *) Secure

     *) portable

     *) multithreaded

     *) Dynamic

*) Java is Simple

     *) fixes some clumsy features of c++

     *) no pointers

     *) automatic garbage collection

     *) rich pre-defined class library

*) Learning and practicing java is easy because of resemblance    with c and C++.

*) Java is Object-Oriented

     *)  All functions are associated with objects

     *) Focus on the data(objects) and method manipulating the data

     *) Almost all data types are objects (file,strings,etc.)

     *) potentially better code organization and reuse

*)it supports concept of Inheritance ,polymorphism ,   encapstulation,data hiding etc.

     *)  Unlike C++, Java is purely OOP.

*) java is Distributed

*) java is supports network programming like client server paradigram like client-server paradigram and implementation of simple client server application

*) java is also support web service protocol

*) Java is designed for use on network; it has an extensive library which works inagreement with TCP/IP.

*) Java is interpreted

*) java compiler generate byte-codes,not native  machine code

*)  the compiled byte-code are plateform independent

*) java bytecode are translated on the fly to machine readable    instruction in runtime(java virtual machine)

*) java programs are compiled to generate the byte code. This    byte code can be downloaded and interpreted by the interpreter. Class file will have byte code instruction and JVM which contains an interpreter will execute the byte code.

*) Java is Robust(Strong/powerful)

     *) Extensive compile-time and runtime error checking

     *) No pointers but real arrays.

     *) memory corruption or unauthorized memory accesses are impossible

     *) Automatic garbage collection tracks objects usage over time

     *) Java programs will not crash because of  its exception handling

                and its memory management features.

*) java is Secure

     *) Usage in networked environments require more security

     *) memory allocation model is a major defence

     *) access  restriction are forced(private,public)

     *) Java is designed for use on Internet. Java enables the construction of virus-free,

                 tamper free systems.

*) Java is portable

     *) same application runs on all platfor m

     *) The size of primitive data types are always the same.

     *) the libraries define portable interfaces

     *) Java does not have implementation dependent aspects and it yields or gives same

                 result on any machine.

*) Java is multithereaded

     *) Multiple concurrent thread of executation can run simultaneously

     *) Executing different parts of program simultaneously is called multithreading.

    This is an essential feature to design server side programs.

*) Java is Dynamic

     *) java is design to adapt to evolving environment

     *) library can freely add new methods and instance variables without any effect on their          clients

     *) can check the class type in runtime

     *) We can develop programs in Java which dynamically change on Internet (e.g.:

                 Applets).