Core java

Introduction
Java language is the most popular
programming language in use today by many
measures.
Portability across hardware platforms
and operating systems is the main benefit of
Java applications.

CONTENT
• What is Java ?
• Where is Java used ?
• Features of Java
• Java Program Translation
• Java Virtual Machine
• Java system overview
• Java Program-Development phase
• Advantage of java
• Disadvantage of java
• Project

WHERE IS JAVA USED ?
According to the Sun , 3 billion devices run 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 System.
Games.
Robotics.

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

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
t ranslate Bytecode into machine language.
JVM are available for many hardware and
software Plateform.

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 Programming
Language

 Object
 Class
 Encapsulation
 Inheritance
 Polymorphism
 Abstraction
CONCEPTS OF OOP

JAVA SYSTEM OVERVIEW
Java Application
Java Programming Language
Java Native
Interface
Java Class Library
Java Virtual Machine
Class
Loader
Verifier Execution
Operating System

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.

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).

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

PROJECT
LIBRARY MANAGEMENT SYSTEM

OBJECTIVE
 Online book issue
 Request column for librarian
for providing new books
 A separate column for digital
library

OBJECTIVE
 Student login page where
student can find books issued
by him/her and date of
return.
 A search column to search
availability of books

Core java

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