for java student

1. A
PRESENTATION
ON
BASIC OF JAVA
SUBMITTED BY:-
DIVAS KUMAR GUPTAdivas007developer@gmail.com 1

2. INTRODUCTION OF JAVA
JAVA is a programming
language and a platform
independent language. Which
follow the concept of oops.
Platform independent that
means its byte code is able to run
in any o/s. It has own (JRE) java
runtime environment.divas007developer@gmail.com 2

3. The green project begain in
1991.
Original language name : OAK.
Name changed to java.
First public release in 1995.
Write once run everywhere.
HISTORY OF JAVA

4. JAVA IS USED.
There are many devices where java
is currently used . Some of them
are as follows:-
Desktop application
such as acrobat
reader, media player,
antivirus etc.
Web application
such as irctc.co.in,
java.com etc.
Enterprises application
such as banking
application, mobile
embedded system, Smart
card Robotics, Games etc.
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5. FEATURES OF JAVA
Simple
Object Oriented
Dynamic
Secured
High performance
MultithreadedRobust
Architecture neutral
Portable
Distributed
JAVA
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6. •System is based on c++ .
•Removed many confusing
and/or rarely used feature. Ex
:- pointer, operator
overloading etc.
•No need to remove
unreferenced objects
because there is automatic
garbage collection in java.
JAVA
language
is simple
because :-
SIMPLE
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7. OBJECT -
ORIENTED
Class
/object
inheritance
Abstraction
Encapsulation
Data hiding
Basic
concept
of OOPS
are :-
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8. PLATFORM-INDEPENDENT
JAVA COMPILER
JAVA BYTE CODE
Windows 95 Macintosh Solaris Windows NT
(translator)
(same for all platforms)
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9. PLATFORM INDEPENDENCE
Windows 7
Macintosh
Solaris
Windows NT
J
V
M
DEMO
.class
DEMO.
java
After
compilation it
create .class it
also known as
byte code.
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10. In JAVA , there is no use of pointer
that’s why JAVA is secure.
Because no one interacts with there
memory access so there is no chance to
hack or destroy our data from hacker.
SECURED
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10

11. It means java program execute in
any platform it is not depend
upon any particular
platform(architec) . Like:-
windows, mac, sun solaris etc.
ARCHITECTURE NEUTRAL
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12. Robust simply means Error tolerance.
Java uses strong memory management.
There are lack of pointer that avoids security problem.
There is automatic garbage collection in java.
There is exception handling and type checking mechanism in java.
All these points makes java robust.
ROBUST
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12

13. We can carry the java
byte code to any
platform.
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PORTABLE

14. Java is faster than traditional
interpreter or compiler. Because
its 80 % syntax is based on c , c++
which is directly interact with o/s.
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High performance

15. We can create distributed applications in java.
Distributed computing involves several computer on a
network working working together.
Java is designed to make distributed computing easy with
the networking capability that is inherently integrated
into it.
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Distributed

16. divas007developer@gmail.com 16
Example of distributed
Bank
account
SBI ATM PNB ATM
ICICi ATM DENA ATM

17. JAVA programs are compiled into byte code
that can be stored on any type machine.
Interpreted is used to read byte code and
execute it.
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INTERPRETED

18. A thread is like a separate program executing
concurrently.
We can write java program that deal with many task at
once by defining multiple thread.
The main advantage of multi-threading is that if shares
the same memory. Thread are important for multimedia,
web-application etc.
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Multi-threaded

19. divas007developer@gmail.com 19
First java program in java
class simple
{
Public static void main(String args[])
{
System.out.Println(“Hello java”);
}
}
Save the file as simple.java
To compile:- javac simple.java
To run:- java simple
Out put :- Hello java

20.  Open command prompt
 Copy the path of bin folder
 Write in command prompt
 Set path= copied path
ex:- set path = C:Program FilesJavajdk1.7.0_25bin;.;
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Set the temporary path of jdk
we need to follow these steps:-

21. •Local variable
•Instance variable
•Static variable
Variable is a
name of
memory
location.
There are
three types of
variable.divas007developer@gmail.com 21
Variable in java

22. •Primitive
•Non primitive
There are
two types
of data
types in
java.divas007developer@gmail.com 22
Data type in java

23. Local variable:- A variable that is declare inside the
method is called local variable. Local variable must be
initialized.
Instance variable:- A variable that is declared inside the
class but outside the method is called instance variable
.it is not declared as static.
Static variable:- A variable that is declared as static is
called static variable. It can’t be local.
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Types of variable

24. divas007developer@gmail.com 24
Class test
{
Int x; //instance variable
Static int y; //static variable
Void sum() {int x=5;} //local variable
Public static void main(String args[])
{
System.out.Println(“Example of variable”);
}
}
//static method
Variable example

25. it
will
countinue…………..
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26. THANKS
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