![Nov 6, 2014 compare.ppt 6
// Java
public class Hello {
public static void main(String[] args) {
System.out.println("Hello world in Java");
}
}
// C#
namespace Hello {
public class Hello {
static void Main(string[] args) {
System.Console.WriteLine ("Hello world in C#");
System.Console.ReadLine();
}
}
}
‘ VB
Module HelloWorld
Sub Main
System.Console.WriteLine(“Hello World in
VB.NET”)
System.Console.ReadLine()
End Sub
End Module
console programs](https://image.slidesharecdn.com/synapseindiajavaand-150107043441-conversion-gate02/85/SynapseIndia-java-and-net-development-6-320.jpg)
![Nov 6, 2014 compare.ppt 8
mininal window
import java.awt.*;
import javax.swing.*;
public class Hello extends JFrame implements Runnable
{
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Hello());
}
public void run()
{
this.setSize(new Dimension(200,200));
this.setTitle("Hello in Java");
this.setVisible(true);
}
}
using System.Windows.Forms;
namespace TinyWindowApp
{
public class HelloForm : Form
{
static void Main()
{
Application.Run(new HelloForm());
}
public HelloForm()
{
ClientSize = new
System.Drawing.Size(200, 200);
Text = "Hello in C#";
}
}
}](https://image.slidesharecdn.com/synapseindiajavaand-150107043441-conversion-gate02/85/SynapseIndia-java-and-net-development-8-320.jpg)
SynapseIndia java and .net development
- 1. compare.ppt 1 Platform Comparison Java and .NET
- 2. Nov 6, 2014 compare.ppt 2 Java and .NET • Java was created by Sun in 1992 • Microsoft introduced .NET and C# in 2000 • both platforms are object-oriented, type safe, and have automatic garbage collection • the two platforms have been competing vigorously on the desktop • but especially in the area of server technology • many developers become expert on one platform • few have time to learn both • the schism of understanding the two platforms widens • due to misinformation and disinformation • what are the strengths and issues for each platform?
- 3. Nov 6, 2014 compare.ppt 3 2008 forecast for market share of OS by platform: (2q 06) Windows 40% Unix 29% Linux 15% Others 16% forecast market share of OS unit sales: (05) in 2002 in 2003 in 2007 Windows 45% 59% 59% Linux 20% 24% 33% Unix 16% 10% 5% Others 19% 7% 3% market share of server shipments by platform in 2005: Windows 65.6% Linux 20.0% Unix 9.5% NetWare 4.2% Others 0.7% FROM: InfoTech Trends http://www.infotechtrends.com/ report from 2Q 2006, accessed on 4/8/2007
- 4. Nov 6, 2014 compare.ppt 4 main sections 1. simple programs 1. overview of platforms 1. why did Sun do it? 1. why did Microsoft do it? 1. Service Oriented Architecture – the peacemaker?
- 5. Nov 6, 2014 compare.ppt 5 1 simple programs
- 6. Nov 6, 2014 compare.ppt 6 // Java public class Hello { public static void main(String[] args) { System.out.println("Hello world in Java"); } } // C# namespace Hello { public class Hello { static void Main(string[] args) { System.Console.WriteLine ("Hello world in C#"); System.Console.ReadLine(); } } } ‘ VB Module HelloWorld Sub Main System.Console.WriteLine(“Hello World in VB.NET”) System.Console.ReadLine() End Sub End Module console programs
- 7. Nov 6, 2014 compare.ppt 7 how much work is it to get this?
- 8. Nov 6, 2014 compare.ppt 8 mininal window import java.awt.*; import javax.swing.*; public class Hello extends JFrame implements Runnable { public static void main(String[] args) { SwingUtilities.invokeLater(new Hello()); } public void run() { this.setSize(new Dimension(200,200)); this.setTitle("Hello in Java"); this.setVisible(true); } } using System.Windows.Forms; namespace TinyWindowApp { public class HelloForm : Form { static void Main() { Application.Run(new HelloForm()); } public HelloForm() { ClientSize = new System.Drawing.Size(200, 200); Text = "Hello in C#"; } } }
- 9. Nov 6, 2014 compare.ppt 9 2 overview of platforms
- 10. Nov 6, 2014 compare.ppt 10 identical types of runtime environments •J2SE (Standard) runtime •desktop applications •J2EE (Enterprise) runtime •web applications •J2ME (Micro) runtime •runtime for gadgets C# or VB.NET with VS Express desktop application IIS with VS Express Web web applications .NET compact framework runtime for gadgets
- 11. Nov 6, 2014 compare.ppt 11 Java platform - .NET platform • Java Virtual Machine (JVM) aka Java Runtime Environment (JRE) • Linux, Windows, Mac and Unix • download from Sun • JIT compiler and libraries • Java Development Kit (JDK) • Java compiler and utilities • Java bytecode • integrated development env. (IDE) • Eclipse (free - IBM) • Netbeans (free - Sun) • application servers • Tomcat • Glassfish (Sun) • BEA Weblogic • IBM Websphere • Microsoft .NET Framework 2.0 aka .NET common language runtime (CLR) • all versions of Windows (40+) • download from Microsoft • JIT compiler and libraries • NET framework 2.0 SDK • C# and VB.NET compilers and utilities • Common Intermediate Language (CIL) • integrated development env. (IDE) • Visual Studio Express (free - Microsoft) • application servers • Microsoft Internet Information Server (IIS) FREE NOT
- 12. Nov 6, 2014 compare.ppt 12 features 1 •virtual machine •platforms (all major OS’s) •spec •implementations •libraries •languages •Java •Jython •Groovy •web servers (many vendors) •platforms (Unix, Linux) •scalability •cost •web capabilities •servlet •JSP •JSF virtual machine platforms (all versions of Windows) spec implementations libraries languages C#, VB.NET, J# from Microsoft many others from third parties (Haskell, Lisp, Python, COBOL, Fortran, etc.) web servers (just one!) platforms (most Windows) scalability cost web capabilities handler ASP (.NET) (forgot equivalent name)
- 13. Nov 6, 2014 compare.ppt 13 features 2 •native code calling •components •beans •environments •applet (in browser) •servlet (in server) •Web Start •installs from web •caches on user’s PC •deployment •.jar •.war •.ear •.class •complex, painful learning curve that differs for each web server, container, and IDE •automated via ANT •XML, like make on Unix native code calling components .DLL environments ActiveX (in browser) handler (in server) Smart Client installs from web caches on user’s PC deployment .exe (on file system) .exe (in GAC) .dll (on file system) all builds and web installation is automatically handled by Visual Studio (Microsoft’s IDE)
- 14. Nov 6, 2014 compare.ppt 14 features 3 •databases •JDBC •CORBA •binary object remoting •XML •via 3rd -party add-ons until Java 6 •IDE’s •Eclipse, with 1000’s of plugins •NetBeans (from Sun) – also free •service oriented architecture (SOA) •annotations appearing •web services WS-I •supported but difficult (3rd party) •new partial automation in Java 6 and latest NetBeans IDE •I haven’t evaluated these yet databases ODBC COM binary object remoting XML excellent support early one IDE’s free versions of Visual Studio some third party IDE’s service oriented architecture (SOA) annotations web services WS-I superbly automated by Visual Studion since 2005
- 15. Nov 6, 2014 compare.ppt 15 the JRE and .NET runtimes include lots of libraries • programs can call a huge body of pre-written code • these reusable components are called the Class Libraries • in Java, sometimes they are also called packages or Java API’s • in .NET, they tend to be called the framework class libraries • the libraries are designed to be used identically • in Java, regardless of the underlying operating system • in .NET, regardless of the underlying version of Windows OR which language is being used
Editor's Notes
- #7: NOTE: namespace case sensitive semi-colons after each statement OPTIONAL incoming arguments
- #10: the runtime and its JIT compiler technology the framework libraries the compilers (C#, VB.NET, C++, J#)
- #12: Previous programming languages also required a runtime subsystem to execute Pascal compiled down to intermediate P-code, which was then interpreted Visual Basic (before the .NET versions) compiled to an intermediate code which required the VB runtime library to be installed bytecode is big endian (first made for Unix), CIL is little endian (Intel) the JVM (JRE) and CLR and not interpreters they use just-in-time (JIT) compiler technology they both compile procedures to native code immediately before the code needs to execute
- #16: A few other languages now exist which can share these rich libraries Jython, JRuby .NET Framework Class Libraries, aka Base Class Libraries