1. Suresh Ramachandran Duke Energy
Microsoft .Net vs. J2EE
Suresh Ramachandran
Duke Energy

2. J2EE: Java 2 Enterprise Edition
J2EE – Enterprise Java
J2EE: Java 2 Enterprise Edition
Superset of Java 2 Standard Edition (J2SE)
Adds enterprise features to Java Libraries
Defined through the Java Community Process (JCP)
Wholly owned property of Sun Microsystems

3. J2EE Solutions vs Microsoft .Net Solutions Similarities
Both multi-tiered, similar computing technologies
Both support “standards”
Both offer different tools & ways to achieve the same goal.
A lot of parallelism can be seen.
Very difficult to compare and qualify the comparison because each has its own advantages & disadvantages.

4. Microsoft .Net vs. J2EE Comparison Language
C# and Java both derive from C and C++.
MS says: “C# combines the power of VC++ with the ease of usage of VB”
Significant features include garbage collection, hierarchical namespaces) are present in both.
Different Syntax but same result.
Java runs on any platform with a Java VM. C# only runs in Windows for the foreseeable future.
C# is implicitly tied into the CLR and is compiled entirely into native code. Java code runs as Java Virtual Machine and executes byte code

5. Microsoft .Net vs. J2EE Comparison Java vs. C#
// This is a comment in Java code
class HelloWorld{
public static void main(String[] args){
for(int i= 1; i<= 100; i++) System.out.println("Hello!");   } }
// This is a comment in C#
using System;
class HelloWorld{ static void Main(){ for(int i=1; i<=100; i++)      Console.WriteLine("Hello");   } }

6. Microsoft .Net vs. J2EE Comparison Presentation Layer
ASP(+) vs. JSP
ASP(+) can use Visual Basic, C#, and possibly other languages for code snippets.
JSPs use Java code (snippets, or JavaBean references), compiled into Java
Win Forms/Web Forms Vs Swing/Java Server Faces

7. Microsoft .Net vs. J2EE - A technical Comparison Common Elements
Concepts J2EE .NET
Presentation JSP/Servlets ASP.NET
Business Logic EJB/Servlets Code Behind, Remoted Classes
Language Java C#, VB.NET
Platform Any Windows
DB Connectivity JDBC ADO.NET (OLE-DB, ODBC)
Web Services JWSDP Web Services
Messaging JMS MTS
Runtime JRE CLR
Transaction JTA/JTS, XA Com+, DTC
Distributed computing RMI, CORBA, SOAP SOAP, DCOM
XML Parser JAXP, Others Built-in (System.XML)

8. Microsoft .Net vs. J2EE Scorecard
Criteria
J2EE
.NET
Comments
Ease Of Use (Development Environment) **
****
VB.net and C# are easier to use than J2EE
Scalability
***
Execute Java Code on Mainframe
Single Language Multiple Platforms *
Java Can run on many platforms through the JVM
Multiple Languages Single Platform
VB,C#,J# all run in the same run-time environment
Reliability
VB/Com developmen in 1993
Performance
Equal Performance
Speed of development
VB code easiar to learn
Reuse
Deploy saame code on multiple platforms and multiple projects
Open Standards
*****
Java, JVM are open standards
Overall
56%
51%

9. A typical .NET Enterprise Solution
IIS on W2k Server
SQL
Server
Browser
.NET
managed
component
ASP
.NET
Windows
Client

10. A typical J2EE Enterprise Solution
Java App
Server DB
Server
Browser
Servlet
JSP
EJB
Java
Client

11. Architecture J2EE Server CORBA Server IIOP LDAP RDBMS SQL Message
Queue
JMS
EJB Container
RMI
Client
JSP
Servlet
Servlet Container
HTTP
Other
Resource
???
HTTP Engine
JDBC
CLR Platform
Other
Server
SOAP
System.Directory
RDBMS
ADO.NET
Message
queue
Client
HTTP
Resource
???
Comp. Services
Component
ASMX
ASPX
ASP.NET
Controls
.NET
App
CLR Host
IIS –
HTTP Engine

12. Porting Java Pet Store (Example) to .NET
15500
Lines of Code Required
14,273
14000
.NET Petshop
11500
Java Pet Store
9000
7500
5,891
5,404
4,410
5000
2,865
2,566
2500
710
761
412 74
Total Lines of Code
User Interface
Middle Tier
Data Tier
Configuration

13. Microsoft .Net vs. J2EE Comparison CLR vs JVM
Java C# VB
.Net
Managed
C/C++
Lots of other
Languages
Byte Codes
MSIL
CLR
CTS GC Security
Runtime Services
JRE (JVM)
GC Security
Runtime Services
Windows OS
Mac
Win
Unix
Linux
Both are ‘middle layers’ between an intermediate
language & the underlying OS

14. Microsoft .Net vs. J2EE Comparison JVM vs. CLR at a glance
Managed execution environment X
Garbage Collection
Metadata and Bytecode
Platform-abstraction class library
Runtime-level security
Runs across hardware platforms ?

15. Microsoft .Net vs. J2EE Comparison
In J2EE, not in .Net
Entity Beans
Utility APIs like logging, preferences
Public profiling APIs like JVMPI, JPDA
In .Net, not in J2EE
Server side control
Serialization to XML
Compilation to native code

16. .Net Disadvantages Security Immaturity
.NET better than prior frameworks (DNA, DCOM, ActiveX, etc.), but still based on Windows
Immaturity
Version 1.0 issues, likely to change in future
Language changes for developers new to .NET
Application migration to .NET costly
Not enough real world use yet to evaluate
Vendor lock-in
Future direction determined by Microsoft.

17. Choosing between Java/J2EE and .Net
The ultimate choice usually depends not on technical superiority, but on:
Cultural/”religious”/political preferences
Customer preference
Vendor relations
Cost
Platform Dependency
Skill set of your developers

18. Questions