50-platforms.ppt

8/9/2019 50-platforms.ppt

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Mar 20, 2015 compare.ppt 1

Platform Comparison

Java and .NET

Pat PalmerUniversity of Pennsylvania


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Java and .NET

• Java was created by Sun in 1992

• Microsoft introduced .NET and C# in 2

• bot! "atfor$s are ob%ect&oriented' ty"e safe' and !aveauto$atic (arba(e coection

• t!e two "atfor$s !ave been co$"etin( vi(orousy on t!edes)to"

• but es"eciay in t!e area of server tec!noo(y

• $any deveo"ers beco$e e*"ert on one "atfor$

• few !ave ti$e to earn bot!

• t!e sc!is$ of understandin( t!e two "atfor$s widens

• due to $isinfor$ation and disinfor$ation

• w!at are t!e stren(t!s and issues for eac! "atfor$+


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2008 forecast for market share of OS by platform: ,2- /

0indows

3ni* 29

4inu* 156t!ers 1

forecast market share of OS unit sales: ,5/

in 2002 in 2003 in 2007

0indows 5 59 59

4inu* 2 2 77 3ni* 1 1 5

6t!ers 19 8 7

market share of server shipments by platform in 2005:

0indows 5.

4inu* 2.

3ni* 9.5

Net0are .2

6t!ers .8

:6M; 2' accessed on =?=28


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main sections

1. si$"e "ro(ra$s

2. overview of "atfor$s

7. w!y did Sun do it+

. w!y did Microsoft do it+

5. Service 6riented @rc!itecture A t!e "eace$a)er+


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1 simple programs


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// Javapublic class Hello { public static void main(trin!"# ar!s$ { ystem.out.println(%Hello &orld in Java%$'

// C)

namespace Hello {

public class Hello {

static void *ain(strin!"# ar!s$ {

ystem.Console.+rite,ine (%Hello &orld in C)%$'

ystem.Console.-ead,ine($'

0*odule Hello+orld

ub *ain

ystem.Console.+rite,ine(1Hello +orld in 0.NET2$

ystem.Console.-ead,ine($

End ub

End *odule

consoe "ro(ra$s


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$inina window

import %ava.awt.Bimport %ava*.swin(.B

public class Deo extends Jra$e implements :unnabe

public static void $ain,Strin(FG ar(s/

Swin(3tiities.invokeLater ,new Deo,//

H

public void run,/

this.setSiIe,new i$ension,2'2// this.setTite,KDeo in JavaK/

this.setLisibe,true/ HH

using Syste$.0indows.or$snamespace Tiny0indow@"" public class Deoor$ ; or$

static void Main,/ @""ication.:un,new Deoor$,//

H

public Deoor$,/

CientSiIe new Syste$.rawin(.SiIe,2' 2/

Te*t KDeo in C#K

H

H

H



2 overview of platforms



identica ty"es of runti$e environ$ents

• J2SE ,Standard/ runti$e

•des)to" a""ications

• J2EE ,Enter"rise/ runti$e

•web a""ications

• J2ME ,Micro/ runti$e

•runti$e for (ad(ets

•C# or L.NET wit! LS E*"ress

•des)to" a""ication

•



Java platform - .NET platform

• Java Lirtua Mac!ine ,JLM/

a)a Java :unti$e Environ$ent ,J:E/• 4inu*' 0indows' Mac and 3ni*

• downoad fro$ Sun

• J



features %

•virtua $ac!ine

•"atfor$s ,a $a%or 6Ss/

•s"ec

•i$"e$entations

•ibraries

•an(ua(es

• Java

• Jyt!on

•Proovy

•web servers ,$any vendors/

•"atfor$s ,3ni*' 4inu*/

•scaabiity

•cost

•web ca"abiities

•servet

• JS

• JS

•virtua $ac!ine

•"atfor$s ,a versions of 0indows/

•s"ec

•i$"e$entations

•ibraries

•an(ua(es

•C#' L.NET' J# fro$ Microsoft

•$any ot!ers fro$ t!ird "arties

,Das)e' 4is"' yt!on' C664' ortran' etc./

•web servers ,%ust oneU/

•"atfor$s ,$ost 0indows/

•scaabiity

•cost•web ca"abiities

•!ander

•@S ,.NET/

•,for(ot e-uivaent na$e/



features 2

•native code cain(

•co$"onents•beans

•environ$ents•a""et ,in browser/

•servet ,in server/

•0eb Start

•instas fro$ web•cac!es on users C

•de"oy$ent•.%ar

•.war

•.ear

•.cass•co$"e*' "ainfu earnin(curve t!at diVers for eac! webserver' container' and



features &

•databases

• JC

•C6:@

•binary ob%ect re$otin(

•WM4

•via 7rd&"arty add&ons unti Java

•



the JRE and .NET runtimes include lots of libraries

• "ro(ra$s can ca a !u(e body of "re&written code

• t!ese reusabe co$"onents are caed t!e Cass 4ibraries

• in Java' so$eti$es t!ey are aso caed "ac)a(es or Java API’s

• in .NET' t!ey tend to be caed t!e ra!e"ork cass ibraries

• t!e ibraries are desi(ned to be used identicay

• in Java' re(ardess of t!e underyin( o"eratin( syste$

• in .NET' re(ardess of t!e underyin( version of 0indows

6: w!ic! an(ua(e is bein( used



Just in Ti$e ,J



console commands for compiling Java and C.NET

> java hello

hello.java

hello.class

javac

1!!1111!1!!!111!Java b"tecode

hello.cs

hello.exe

csc

1!!1111!1!!!111! Common #ntermediate $anguage %C#$&

> hello.exe

these run in differentvirtual machines

assembl"



.NET platform components

Microsoft operating systems since Win98Microsoft operating systems since Win98

Common Language Runtime CLR!

virtual machine (like Java)

frame"or# class libraries

$ata and %ML

web services automation Windows Designer

&' C(( C)

*+,.-T/ II+

J) ,yt0on 1co$"iers

Microsoft .NETra$ewor)

'icrosoft (isualStudio )#"$

download freeSoftware*evelopment+it ,S*+-

freedownloa

d



Java platform components

2ni3/ Linu3/ Ma3 4+ %/ Windo"s2ni3/ Linu3/ Ma3 4+ %/ Windo"s

Java Runtime nvironement JR!

virtual machine

Java *,I5s

$ata and %ML

web services automation beans, remoting, servers

Java JRuby

Java +erver ,ages and servlets

J,yt0on 1co$"iers

J:E and JO

download freeSoftware*evelopment+it ,S*+-

freedownloa

d

various open sourceand proprietary players



w!o i$"e$ents Java runti$es+

Sun Microsyste$s• Java DotS"ot Lirtua Mac!ine

for 0indows' 4inu*' 3ni*

Dewett&ac)ard• Java runti$e for D&3W' 6"enLMS'

Tru' :eiant,Tande$/ 3N



3ar!on c4ec5list

' metadata

' bytecode

' J*' J-E

' J67

' J8E

' J8*E' J8EE

' 96E

' :U9

' &4at is an assembly;' an .e



( wh" did )un do it*



C and C++ perceived common problems

• "ointers are dan(erous• $e$ory ea)s ,faiin( to free $e$ory correcty/

• function "ointers ,%u$"in( to t!e wron( "ace/

• data "ointers ,"ointin( to t!e wron( "ace/

• $anua (arba(e coection is a ot of wor)

• $uti"e in!eritance ,CRR/ can (et very co$"icated

• a$bi(uities i)e t!e Ydia$ond "robe$Z ,a.).a. Ydia$ond ofdeat!Z/

• not easiy "ortabe across "atfor$s' even wit! re&co$"ieand disci"ine



a few ways Java i$"roved on CRR

• instead of "ointers' Java !as reeren#es•

references are si$iar to "ointers' but wit! "rotections,cannot %u$" into ie(a "arts of $e$ory/[avoidsse($entation faut "robe$s

• auto$atic (arba(e coection• $e$ory is recai$ed fro$ t!e !ea" auto$aticay[avoids

$e$ory ea)s

• sin(e in!eritance• avoidin( t!e deady dia$ond of deat!

• enca"suation• a code $ust be in a cass[intended to encoura(e

infor$ation !idin(

• array bounds c!ec)in(• ibraries

• $any co$$on tas)s aready coded and avaiabe for YreuseZby $eans of in!eritance

• $any interfaces ,be!aviors/ aready coded


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, wh" did icrosoft do it*


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icrosofts big headache

• "rior to .NET' Microsoft !ad a $i% !eadac!e

• Microsoft was su""ortin( too $any o"eratin( syste$s• a""ication "ro(ra$$in( interfaces ,@


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part" trivia /uestion

• !ow $any diVerent versions of t!e 0indows o"eratin(syste$ e*isted $eore &ista' w!ic! !ad t!eir own distinct$i* of @


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0indows versions which can run the .NET framewor

1. 0indows 9?

2. 0indows 9? Second Edition

7. 0indows 2 rofessiona wit! S

. 0indows 2 Server wit! S

5. 0indows 2 @dvanced Server wit! S

. 0indows 2 atacenter Server wit! S

8. 0indows W rofessiona wit! S2

?. 0indows W Do$e Edition wit! S2

9. 0indows W Media Center Edition 22 wit!S2

1. 0indows W Media Center Edition 2 wit!S2

11. 0indows W Media Center Edition 25

12. 0indows W Tabet C Edition wit! S2

17. 0indows W Starter Edition

1. Microsoft 0indows Mienniu$ Edition

15. Microsoft 0indows Server] 27 StandardEdition

1. 0indows Server 27 Enter"rise Edition18. 0indows Server 27 atacenter Edition

1?. 0indows Server 27 0eb Edition19. 0indows Server 27 :2' Standard Edition

2. 0indows Server 27 :2' Enter"rise Edition

21. 0indows Server 27 :2' atacenter Edition

22. 0indows W rofessiona * Edition

27. 0indows Server 27' Standard *Edition

2. 0indows Server 27' Enter"rise *Edition

25. 0indows Server 27' atacenter *Edition

2. 0indows Server 27 :2' Standard *Edition

28. 0indows Server 27 :2' Enter"rise* Edition

2?. 0indows Server 27 :2' atacenter* Edition

29. 0indows Server 27 wit! S1'Enter"rise Edition for


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0indows versions that can not run the .NET framewor v2.!

1. 0indows 95

2. 0indows NT^ Server

7. 0indows NT 0or)station

. 0indows Server 27' Enter"rise Edition for


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)ervice 3riented 4rchitecture 5 the peacemaer*


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w!o are t!e bi( web server and database $ar)et"ace "ayers+

• Sun

•


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world wide web development

• Java servets

• Java Server a(es ,JS/• eans

• C6:@ ,binary/

• WM4 web services ,S6@/

• .NET !anders

• @ctive Server a(es ,@S.NET/• .NET 44s and .NET custo$ contros

• C6M ,binary/

• WM4 0eb services ,S6@/


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Service 6riented @rc!itectures ,S6@/

• web services

•re$otey ocated "ro(ra$s t!at use WM4 to $a)e re$otecas and (et t!e resuts

• WM4 travein( over DTT

• its a "ain te*t and (oes t!rou(! Qrewas

• standards are e$er(in(

• Jave service end "oints and Microsoft cient end"oints canta) to eac! ot!er ,and vice versa/


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what we 6ust covered

1. si$"e "ro(ra$s

2. overview of "atfor$s

7. w!y did Sun do it+

. w!y did Microsoft do it+

5. Service 6riented @rc!itecture A t!e "eace$a)er+


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the end of this .ower.oint /le

6ooray7

50-platforms.ppt

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