Java technology is a high-level programming and a platform independent language. Java is designed to work in the distributed environment on the Internet.
What is the use of java?
Java technology is
a high-level programming and a platform independent language. Java is designed
to work in the distributed environment
on the Internet. Java has a GUI features that provides you better "look and
feel" over the C++ language, moreover it is easier to use than C++ and works on the concept of object-oriented
programming model. Java enable us to play online games, video, audio, chat
around the world, Banking Application, view 3D image and Shopping Cart. Java
find its extensive use in the intranet applications and other
e-business solutions that are the grassroots of corporate computing. Java , regarded as the most
well described and planned language to develop an
applications for the Web.
is a well known technology which allows you for software designed and written only once for an
"virtual machine" to run on a different computers,
supports various Operating System like Windows PCs, Macintoshes, and Unix computers. On the
web aspect, Java is popular on web servers, used by many of the
largest interactive websites. Java is used to create standalone applications
which may run on a single computer or in distributed network. It is also be used to
create a small application program based on applet,
which is further used for Web page. Applets make easy and possible to interact with
the Web page.
Preferred Over Other Languages
The Java is a high-level programming language that can be
supported by all of the following features:
Java has advantages over other languages and environments that
make it suitable for just about any programming task.
The advantages of Java are as follows:
- Java is simple, easy to design
, easy to write, and therefore easy to compile, debug, and learn than any other programming languages.
- Java is object-oriented, that
is used to build modular programs and
reusable code in other application.
- Java is
platform-independent and flexible in nature. The most significant feature of Java
is to run a program easily from one computer system to another.
works on distributed environment. It is designed to work on distributed computing ,
programs in Java is same as sending and receiving data to and from a file.
- Java is secure. The Java
language, compiler, interpreter and runtime environment are securable .
- Java is robust. Robust means reliability. Java emphasis on checking for possible errors, as Java compilers are able to detect many
error problem in program during the execution of respective program code.
supports multithreaded. Multithreaded is the path of execution for a program to
perform several tasks simultaneously within a program. The java come with
the concept of Multithreaded Program. In other languages,
operating system-specific procedures have to be called in order to work on multithreading.
Java is a high-level programming language and powerful
software platform. On full implementation of the Java platform gives you
the following features:
- JDK Tools: The
JDK tools provide compiling, Interpreter, running, monitoring, debugging, and
documenting your applications. The main tools
used are the
Javac compiler, the
launcher, and the
javadoc documentation tool.
- Application Programming Interface (API): The API
provides the core functionality of the Java programming language. It gives
a wide collection of useful classes, which is further used in your own
applications. It provides basic objects and interface to networking and
security, to XML generation and database access, and much more.
- Deployment Technologies: The JDK software provides two
type of deployment technology such as the Java Web Start software and Java Plug-In
software for deploying your applications to end users.
- Graphical User Interface Toolkits: The Swing and Java 2D toolkits
provide us the feature of Graphical User Interfaces (GUIs).
- Integrated Libraries:
Integrated with various libraries such as
the Java IDL API, JDBC API, Java
Naming and Directory Interface TM ("J.N.D.I.") API, Java RMI,
and Java Remote Method Invocation over Internet Inter-ORB Protocol
Technology (Java RMI-IIOP Technology) enable database to access and
changes of remote objects.
Java Technology Changes Our
- Easy to Start: Since Java programming language is
completely based on object-oriented language, it's easy very simple
and easy to learn, especially for programmers already known with C or C++.
- Easy to write code: As compared to program metrics (class
counts, method counts, and so on) tell us that a program written in the Java
programming language can be four times smaller as compare to the same
program written in C++.
- Write better code: The Java programming language
encourages good coding practices, and manages automatic garbage collection
which helps you avoid memory leaks. Based on the concept of
object orientation, its Java Beans
component architecture, and wide-range, easily
extendible, flexibility and API can reuse existing, tested code and
introduce fewer bugs.
- Develop programs and Time Safer: The Java programming
language is easier and simpler than C++, as such, manages your
development time upto twice as fast when writing in it. The programs
will also require fewer lines of code.
- Platform Independencies: The program keep portable
and platform independent by avoiding the use of libraries written in other
- Write Once and Used in any Java Platform : Any Source
code of Program are written in the Java programming language, that is
compiled into machine-independent byte codes and run consistently on any
platform of java.
- Distribute software makes work easy : Using Java Web
Start software, users will be able to launch own applications with a single
click on mouse. An automatic version check initially weather users are
always up to date with the latest version of your software. If an update is
available for it, the Java Web Start software will automatically update
Platform is cross-combination of hardware or software environment in which a program
runs. We are already known with the most popular platform like
Microsoft Windows, Linux, Solaris OS, and Macintoshes OS.
The Java platform differs from other platforms, that is only software-only platform
which runs on other hardware-based platforms.
The Java platform has two components:
The Java Virtual Machine is the root for
the Java platform and is integrated into various hardware-based platforms.
- The Java Virtual Machine(JVM)
- The Java Application Programming Interface (API)
The API is a vast collection of various software components that
provide you many useful functionality to the application. It is grouped into logical collection
classes and interfaces; these logical collection are known as packages.
The API and Java Virtual Machine insulate the program
Java work on platform-independent environment, the Java platform is bit
slower than native code. However, new changes in compiler and virtual machine
brings performance close to that of native code without posing any threatening
to portability security.
All source code is written in
text files (Notepad Editor) save with the
.java extension in the Java programming
The source files are compiled into
.class files by the
.class file contains byte codes ? the machine
the Java Virtual Machine (JVM). The
java launcher tool runs your application with
an instance of the Java Virtual Machine.
Schematic Flow of Java Software Development Life Cycle
JVM works on different Operating System . The
capable of running on various Operating System. There are some virtual machines, such as the Java Hotspots virtual machine
that boost up your
application performance at runtime . This include various tasks such as Efficiency
of Programme and recompiling (to native code) which is frequently used
sections of code.
JVM, the same application is capable to run on