This presentation gives you a brief idea about both java and microsoft's .net

1. Presented by:
Ravi Vishwakarma

2. Main.java
Compiler
Byte code
(Main.class)
Java Virtual
Machine
(JVM)
Java
Application
Intermediate
language
Contains
Interpreter

3.  Byte code is the intermediate code, just like
object code in C language.
Byte code made Java platform independent.
 Java applications are independent of OS.
Platform for a Java application is JRE and
further this JRE is dependent on OS.

4. C#
VB.NET
Other .NET
languages
MSIL code
(Microsoft
Intermediate
Language )
CLR
Native
Code
C#
Compiler
VB.NET
Compiler
Other
Compiler
Common
language
runtime
Compile time Runtime

5.  .NET framework is platform dependent.
.NET application will run if .NET framework is
installed on that machine.
 Conceptually, .NET is platform independent.
 .NET framework was developed only for Linux,
other than windows, and is named as Mono.NET.

6. JVM v/s CLR:
 JVM designed for platform independence
 Single language: Java (?)
 A separate JVM for each OS & device
 CLR designed for language independence
 Multiple languages for development
 C++, VB, C#, (J#)
 APL, COBOL, Eiffel, Forth, Fortran, Haskel, SML, Mercury,
Mondrian, Oberon, Pascal, Perl, Python, RPG, Scheme,
SmallScript, …
 Impressive usage of formal methods and programming
language research during development
 Underlying OS: Windows (?)

7. CLR vs JVM:
C#
Managed
C/C++
Lots of other
Languages
VB
.Net
CLR or
(Common Language
Runtime)
MSIL
Windows OS
Java
JRE (JVM)
Byte Codes
Mac Unix LinuxWin
Both are ‘middle layers’ between an intermediate
language & the underlying OS

8. Java Byte Code and MSIL:
 Java byte code (or JVML) is the low-level language of the
JVM.
 MSIL (or CIL or IL) is the low-level language of the .NET
Common Language Runtime (CLR).
 Superficially, the two languages look very similar.

9. Choosing between Java and .Net
 The ultimate choice usually depends not on technical
superiority, but on:
 cultural/”religious”/political preferences
 Skill set of your developers
 Customer preference
 Vendor relations