THIS IS JAVA ADVANTAGES AND DISADVANTAGES AND EXAMPLE PROGRAMS

1. Java

2. Topics
• What is java?
• Introduction
• Classes
• What is class?
• Output statement
• Createing a class
• Variables & methods
• access specifiers

3. Topics
• java & c++ between differences
• java advantages
• java disadvantages
• conclusion

4. What is java?
• Java is general purpose high level
programming language developed by
”SunMicrosystems”. A small team of
engineers, known as the Green Team,
initiated the language in 1991. Java was
originally called OAK, and was designed
for handheld devices and set-top boxes.
Oak was unsuccessful, so in 1995 Sun
changed the name to Java.

5. Introduction
• write the source code and save it with the
name of the class and the”extension.java”
• switch to the “MS-DOS” prompt and then
to the folder where you save the source
code.
• set the path to the folder
• c:programjavajdk 1:bin;
• using DOS commands path

6. Introduction
• compile the source code using the
compiler
Syntax:- javac filename.java
• excute the byte code using the integer
present
Syntax:- java byte code & file name

7. Output statement
• the capital statement in java
system.out.println() meaning are to print a
variable value
Syntax:-
System.out.print(“text”/variable);
System.out.printf(“text”/variable);
System.out.println(“text”/variable);

8. Structure of java program
Syntax:-
class name
{
Public static void main(string args[])
{
--------------
--------------
}
}

9. Classes
A class provide the basis for encapsulation it
helps you bind data and code into a
simngle unit

10. What is class ?
A reserved keyword with which we great
classes

11. What is variables and methods?
Specified a list of instance variables
Specified a list of member methods

12. Access specifiers
• it can be either private or public default is
public
Private members:-
The members declered as private cannot be
access from outside the class
Public members:-
The members declered as public can be
access from outside the class

13. Example programs
Class deepika
{
Public static void main(string args[])
{
System.out.println(“hello”);
System.out.println(“how r u”);
}
}

14. Differences b/w java & c++
• c++ :-
• Extends C with
object-oriented programming and
generic programming. C code can most
properly be used.
• Compatible with C source code, except
for a few corner cases.
• Native unsigned arithmetic support.
• Compile-time templates. Allows for Turing
complete meta-programming

15. Differences b/w java & c++
• java :
• strongly influenced c++/c syntax
• provides the java native interface and
recently java native access as a way to
directly c++/c codes
• runs on a virtual machine
• Is reflective, allowing metaprogramming
and dynamic code generation at runtime.

16. Advantages of java
• java is a platform-independent
• java is distributed
• java is interpreted
• java is distributed
• java is secure
• java is robust
• java is multitreded

17. Disadvantages of java
• Performance
• Look and Feel
• Single-paradigm language

18. Createing a object
Once aclass you can then create as many
object as you want belonging to the
variables of aclasses in fact object are
classes other term instances of a class

19. Conclusion
• Java offers the real possibility that most
programs can be written in a type-safe
language. However, for Java to be broadly
useful, it needs to have more expressive
power than it does at present.
• The appendices that follow present a
more detailed specification of our
extensions to the Java language and to
the Java virtual machine