Introduction to java and it's opportunities

What can you do with java ?
• You can develop
o Console based applications
o Window based application
o Server based application.
o Network based applications
o Mobile based applications
o Database applications.
o Web based application(Both client & server based).
 Text based input & output
programs.
 Command line input programs.
E.g. Hardware control program like
whether forecasting , Automated
IoT products .

• You can develop
o Server based application.
o Network based applications
Graphical user interaction
applications
Desktop based applications
E.g. Channel selection and settop
box tunning software ,
Single PC Games.

• You can develop
o Server based application
&
Network based applications
Multi system application.
Proxy Server.
Intranet
E.g.Watch Guard , Live streaming of
videos from CCTV cameras.

• You can develop
&
Android OS
Android Apps
Java powered Mobile apps
(Older versions on nokia N9
series)

• You can develop
&
oMobile based applications
Android OS
Android Apps
Java powered Mobile apps
(Older versions on nokia N9
series)

• You can develop
&
Assesment Portal & Software.
Biometric attendance .
Search engine.
Job portal

• You can develop
&
o Web based application
(Both client & server based).
Web server
Web search engine.
Live learning portal
Google meet , Teamviewer

History Of Java
 Introduced for Interactive Television
 Advanced technology for digital cable television Industry
 Started with GREEN TEAM
 Developed for Digital Set Top Boxes , Television
 It was incorporated by Netscape

History Of Java
 It was first developed by James Gosling, Patrick Naughton, Mike Sheridan
 Developed June 1991
 Called as “GREEN TALK”
 Extension - .gt
 Renamed as “OAK” – Part of Green Project
 OAK – Symbol of Strength, National tree for USA, France, Germany,
Romania

History Of Java
 1995 – OAK renamed as JAVA
 Because of trade market by OAK technologies
 JAVA – Island of Indonesia
 First Coffee was produced called JAVA Coffee
 Subsidary of ORACLE Corporation
 23 Jan 1996 – JDK 1.0 Introduced

Features Of Java
Simple
Robust
Portable
Platform Independent
Secured
High Performance
Multithreaded
Architecture Neutral
Object Oriented
Integrated
Dynamic
Distributed

Features of Java
• Java Is Simple
• Java Is Object-Oriented
• Java Is Distributed
• Java Is compiled and Interpreted
• Java Is Robust
• Java Is Secure
• Java Is Platform Independent
• Java Is Portable
• Java's Performance
• Java Is Multithreaded
• Java Is Dynamic
• Automatic memory management

Characteristics of Java
• Java Is Simple
• Java is compiled and interpreted
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
18
Java is partially modeled on C++, but
greatly simplified and improved.

• Java Is Simple
• Java Is (pure) Object-Oriented
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
19
Java Supports Object Oriented
Concepts
 Class
 Object
 Data Abstraction
 Encapsulation
 Inheritance
 Polymorphism
 Dynamic Binding
 Message Passing

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
20
Java Provides Networking
capability through
 Socket programming
 Servlets.
 JSP.

Java is Compiled and Interpreted
Text Editor Compiler Interpreter
Programmer
Source Code
.java file
Byte Code
.class file
Hardware and
Operating System
Notepad,
emacs,vi
javac java
appletviewer
netscape

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
22
Java has a runtime exception-
handling feature to provide
programming support for
robustness.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
23
Java implements several security
mechanisms to protect your system
against harm caused by stray
programs.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Platform independent
• Java Is Dynamic
24
Write once, run anywhere with a
Java Virtual Machine (JVM), you
can write one program that will run
on any platform.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
25
Since Java is architecture neutral,
Java programs are portable. They
can be run on any platform without
being recompiled with same result.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
• Automatic Memory Management
27
Java uses JIT(Just in time ) complier
along with interpreter to have high
performance in compilation.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
28
Multitasking and parallel execution is
possible ( eg multiplayer games)

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
29
Allows us to create dynamic
applications like animation etc.

• Java Is Simple
• Java Is Robust
• Java Is Secure
• Java Is Dynamic
• Automatic Memory
Management
30
In java, the memory management is
done automatically through automatic
garbage collection

JAVA SE 8
• New features in Java SE 8
– Lambda Expressions
– Pipelines and Streams
– Date and Time API
– Default Methods
– Type Annotations
– Nashhorn JavaScript Engine
– Concurrent Accumulators
– Parallel operations
– PermGen Error Removed
– TLS SNI

Java Development Kit
• javac - The Java Compiler
• java - The Java Interpreter
• jdb- The Java Debugger
• appletviewer -Tool to run the applets
• javap - to print the Java bytecodes
• javaprof - Java profiler
• javadoc - documentation generator
• javah - creates C header files

HOW JAVA WORKS
• Basic requirements for running java
– JRE(Java runtime Environment)
– JVM(Java virtual Machine)
– JDK(Java Developer Kit)

Java better than C++ ?
• No Typedefs, Defines, or Preprocessor
• No Global Variables
• No Goto statements
• No Pointers
• No Unsafe Structures
• No Multiple Inheritance
• No Operator Overloading
• No Automatic Coercions
• No Fragile Data Types

Java IDE Tools
(Software tools)
• Borland Jbuilder.
• NetBeans Open Source by Sun.
• Sun ONE Studio by Sun MicroSystems .
• Eclipse Open Source by IBM .
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