Java is an object oriented programming language. Java programs are platform independent which means they can be run on any operating system.

1. By :
Anuj Kumar Raghav
Assistant Professor
www.akraghav.com2020-21
AKR Education
www.akreducation.com

2.  Introduction :
(Overview of Java , Features, OOPS Concept , Installation )
 (Data types , Variables , Operators)
 Arrays
 Strings
 Exception Handling
 Multithreading

3. Overview
 Java is a programming language originally
developed by Sun Micro System and released in
1995.
 Programming Languages:
A vocabulary and set of grammatical rules
(syntax) for instructing a computer to perform
specific tasks.
• Machine Language
• Assembly Language
• High level Language

4.  It is the lowest-level programming language.
 Machine languages are the only languages
understood by computers.
 For example, to add two numbers, you might
write an instruction in binary like this:
1101101010011010

5.  It implements a symbolic representation of
the numeric machine codes and other
constants needed to program a particular
CPU architecture.
 Assembly Program
to add two
numbers:
name "add"
mov al, 5
mov bl, 10
add bl, al
; bin=00000101b
; hex=0ah or
bin=00001010b
; 5 + 10 = 15 (decimal)
or
hex=0fh or
bin=00001111b

6.  High-level languages allow us to write computer
code using instructions resembling everyday
spoken language (for example: print, if, while)
which are then translated into machine
language to be executed.
Examples :
• ADA • COBOL
• C • C++
• JAVA • BASIC
• PYTHON • PASCAL

7. Compiler
A compiler translates the entire source
code into a machine-code file.
Interpreter
 An interpreter reads one statement from
the source code, translates it to the
machine code or virtual machine code,
and then executes it.

8. Overview of Java
 Java is an object oriented programming
language originally developed by Sun Micro
System and released in 1995.
 Java was originally by James Gosling at Sun
Microsystems (which has since merge in Oracle
Corporation)
 Java programs are platform independent which
means they can be run on any operating system.
 Java codes that run on one platform does not
need to recompile to run on another platform,
it’s called “write once run anywhere”.
Continued…

9. Java is a high level language like C,
C++, and Visual Basic.
It took 18 months to develop the first
working version.
Initially called “Oak”, a tree; renamed
as “Java”, a cup of coffee in 1995.
Byte code is a highly optimized set of
instructions designed to be executed by
the Java run-time system, called as
Java Virtual Machine (JVM).
JVM is an interpreter for byte code.

12.  Object Oriented
Java is an object oriented programming language
which follows the concepts of oop’s.
 Platform Independent
Java application programs written on one
operating system can be able to run on any
platform. So the java is platform independent.
 Simple
Java syntax is similar to c and c++ and it follow the
oop’s concepts so it is easy to learn.
 Secure
Java’s securing feature it enable to develop virus
free, tamper free (software which is not modify
by attacker). Continued…

13.  Portable
We may carry the java byte code to any platform.
 Robust
Robust simply means strong. Java uses strong
memory management.
 Multi Threaded
A thread is like a separate program, executing
concurrently.
 Interpreted
Java is a compiled programming language, but
rather than compile straight to executable machine
code, it compiles to an intermediate binary form
called JVM byte code.
 High Performance
Java is faster than traditional interpretation.

14. Different Editions of Java Technology
 Java SE
Java Standard Edition provides tools and API’s that can
use to create server application, desktop application and
even applets.
 Java EE
Java Enterprise Edition helps in web application service,
component model and enterprise class service oriented
architecture.
 Java ME
Java Micro Edition or JME is use for the development of
software for devices like mobile phones, PDA’s, TV set-top
box, game programming.