This presentation on 'Core Java' by Sudhanshu Vijay covers the definition, uses, features, and key concepts of Java, along with its programming translation and garbage collection mechanisms. It highlights Java's advantages, such as simplicity and cross-platform capability, as well as its disadvantages, including performance issues and limited low-level programming support. The document serves as an overview of Java's functionality and applications across various sectors.

1. A PRESENTATION ON
“CORE JAVA”
SUBMITTED BY:- SUDHANSHU
VIJAY
SECTION:- C
CS DEPARTMENT
SUBMITTED TO:- DR.RAKHI
MUTHA
AND
MR. ASHU
SHARMA

2. CONTENTS
 What is Java?
 Where is Java used?
 Features of java.
 Java programme translation?
 Java Virtual Machine(JVM)
 What is OOP?
 Concept of OOP.
 Java system overview.
 Java Programme – Development Phases.
 Data types in Java.
 Garbage Collection
 Advantages of java
 Disadvantages of java.

3. WHAT IS JAVA?
Java is Object Oriented Programming language as well
as Platform.
Java was developed by a team led by James Gosling at
Sum Microsystems.
Java is the first programming language which provide
the concept of writing programmes that can be
executed using web.

4. WHERE IS JAVA USED?
According to sun there are more than 3 billion devices
that runs on java.
There are many devices where java is currently used.
Desktop Applications - Acrobat reader, Media player,
Antiviruses etc.
Web Applications - irctc.co.in , javatpoint.com etc.
Enterprise Application – Banking Application, Business
Application.
Mobile
Embedded Systems
Games
Robotics

5. FEATURES OF JAVA
Java is Simple.
Java is Object Oriented
Java is Distributed
Java is Architecture Neutral
Java is Robust
Java is Interpreted and Compiled
Java is Secure
Java is Portable
Java is Multi-Threaded

6. JAVA PROGRAM TRANSLATION
Hello.java Javac Hello.class
Interpreter for
windows
Interpreter for
Mac
Interpreter for
UNIX
Source
Programme.
Java compiler Java
Bytecode
(80 %
machine
code & 20%
source code)

7. JAVA VIRTUAL MACHINE
Java virtual machine is the like usual computer which
translate high level language into machine language.
Just like that Java virtual machine also translate
Bytecode into machine language.
JVM are available for many hardware and software
Platform.

8. WHAT IS OOP?
Object-oriented programming is a method of
implementation.
 A language in which everything represent in the form
of Object is called Object Oriented Programming
Language.
It not only makes the program less complex but also
makes the software reuse feasible and possible.
Java is not truly Object Oriented Programing Language.

9. CONCEPTS OF OOP?
 Object
 Class
 Encapsulation
 Inheritance
 Polymorphism
 Abstraction

10. CLASS
Class:-
A class is a template (pre defined structural blueprint) from which objects
are made.
A class is a collection of fields (data) and methods (procedure or function)
that operate on that data. And “class” keyword is used to create any class.
Object:-
Object is an instance of class.

11. JAVA PROGRAMME DEVLOPMENT
PHASES

12. DATATYPES IN JAVA

13. GARBAGE COLLECTION
Garbage collection is the mechanism that De- allocate
the memory of an object when it is no longer
referenced by a variable.
In C++, the memory of an Object is released by use of
delete operator.
Java virtual machine determines when to free up the
memory of an object.

14. ADVANTAGES OF JAVA
Java is simple language.
Java does not support POINTERS.
Java is first language in which programs can be
executed using WEB.
Write Once Run Anywhere (WORA).

15. DISADVANTAGES OF JAVA
Slow Performance.
No support for Low level programming.
Poor features in Java.
No control over Garbage Collection.

16. THANK YOU !

17. QUERIES?