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Introduction to JAVA

Instructor: Md. Saidur Rahman  Sun Certifed Java

Programmer(SCJP)  Email:

saidur19@gmailcom

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Outline

•

!"at is Java•  Java Plat#orms• $o% a Java Program !or&s• !"' Java is t"e ideal tec"nolog' #or

net%or& comuting• Presence o# Java in t"e Current !orld• !"' So#t%are eveloers C"oose Java

Preared *':: +o"ammad Saidur,a"man

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What is Java

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 Java is a High level rogramminglanguage originall' develoed *' JamesGosling at Sun +icros'stems (%"ic" "assince merged into .racle Cororation)

•  /"e language derives muc" o# its s'nta0#rom C and C++ *ut "as a simler objectmodel and #e%er low-level #acilities

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 Java Platorms

•  JS!"Java Standard !dition# – Core Java API used to delo' orta*le alications #or general

use

•  J!! "Java !nter$rise !dition# – an API and runtime environment #or develoing and

running enterrise so#t%are including net%or& and %e*

services and ot"er large2scale multi2tiered scala*le relia*leand secure net%or& alications

•  JM! "Micro !dition# – designed #or em*edded s'stems (mo*ile devices are one &ind

o# suc" s'stems)

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$o% a Java Program !or&s

 JavaSource

3ile(45ava)

 Java 6'teCode

(4class)

.erating S'stem(.S)

 Java %irtual Machine"J%M#

&om$iledto

Run 'n

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Wh( Java is the idealtechnolog( or networ)

com$uting

•  Java is a multipurpose language

• !*cient

•

Platorm $ortable and• Secured

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Presence o Java in the&urrent World

• +.+ billion des&tos run Java

• , million  Java ,untime Environment do%nloadseac" 'ear

• billion mo*ile "ones run Java

• + times more  Java "ones s"i ever' 'ear t"anAle and Android com*ined

•

+/ o# all 6lu2ra' la'ers run Java• +.0 billion Java Cards are manu#actured eac" 'ear

•  Java o%ers set2to *o0es rinters !e* camsgames car navigation s'stems lotter' terminalsmedical devices ar&ing a'ment stations and more

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Wh( Sotware 1evelo$ers&hoose Java

•

!rite so#t%are on one lat#orm and runit on virtuall' an' ot"er lat#orm

• Create rograms to run %it"in a !e**ro%ser and !e* services

• evelo server2side alications #oronline #orums stores olls $/+7 #ormsrocessing and more

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Wh( Sotware 1evelo$ers &hoose

 Java"&ont.#

•

Com*ine alications or services using t"e Java language to create "ig"l' customi8edalications or services

• !rite o%er#ul and ecient alications

#or mo*ile "ones remote rocessors lo%2cost consumer roducts and racticall'an' ot"er device %it" a digital "eart*eat

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So#t%are and /ools

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 Java So#t%are eveloment it (JS) ;3,EE< – Version =

 – no% as J =

• An' /e0t Editor (E0: notead notead>>

Sci/E etc) or An' IE (E0: ?et*eans Ecliseetc)

• IE is not recommended at t"e *eginning

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ES/I.? BBB

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