.NET

1
Visual J.NET Peter Ty Developer
Evangelist .NET and Developer Group
2
Development Vision

• 1 customer challenge is integration
• Both app-to-app and biz-to-biz
• Integration is historically an afterthought
• XML Web Services address this challenge
• New integration methodology
• Use public Internet standards including XML
• Works across OS, programming language, etc.
• .NET is MSs XML Web services platform
• Spans clients, servers and services
• Consistent programming model, highest
  productivity tools for deepest developer pool
• .NET Framework is the programming model

3
Microsoft Visual J .NETJava-language tool for
.NET

• Native support for XML Web services
• Fully integrated with Visual Studio .NET
  development environment
• Full access to the .NET Framework
• ASP.NET, ADO.NET, Windows Forms
• Integration with 20 other languages
• Protection of existing investments
• Use java language syntax on .NET
• Move applications and skills forward

4
Java-language Support
Legacy Java Source
.NET Frameworks
Subset of JDK 1.1.4 VJ 6.0 Libraries
Source Converter
MSIL
.NET Runtime
Win32
5
Java-language Converter

• Supports the Java-language
• Preserves language semantics
• Supports MS extensions for Windows
• J/Direct, JavaCOM, Delegates etc.
• Fully supports consuming .NET Framework
• CLS Compliant

6
.NET Language Extensions

• To be CLS compliant
• Syntax extensions required for CLS
• ubyte
• _at_attribute For attaching .NET attributes
• Support for consuming .NET constructs
• Properties, Events, Delegates, Valuetypes, Enums

7
Using .NET Framework - 1

• Properties use property accessors
• form.set_Text(Hello)
• form.get_Text()
• Delegates - Just create the delegate over a Java
  method
• // EventHandler is a .NET Delegate
• myHandler new EventHandler(OnClickOK)
• Events use event accessors
• okButton.add_Click(myHandler)
• okButton.remove_Click(myHandler)

8
Using .NET Framework - 2

• Attaching .NET attributes
• / _at_attribute WebMethodAttribute(true) /
• String GetStockQuote(String symbol)
• Value types Just use them as reference types
• DateTime dt new DateTime()
• dt DateTime.Parse(01/01/2002 1200)
• System.Object obj dt // This boxes value type
  dt
• Enumerators
• DayOfWeek friday DayOfWeek.Friday
• mySchedule.SetNonWorkingDay(friday)

9
Java/COM And Other Extensions

• J/Direct
• _at_dll.import, _at_dll.struct, _at_dll.structmap etc.
• JavaCOM
• _at_com.class, _at_com.interface, _at_com.method,
  _at_com.register etc.
• Delegates
• delegate, multicast delegate
• Conditional compilation
• if, else, error etc
• _at_conditional

10
JDK Class Libraries

• Based on JDK 1.1.4 Specs
• No JNI and RMI
• Packages
• lang, io, net, util
• awt
• sql, datatransfer, beans, text

11
AWT (Abstract Windows Tooolkit)

• Windowless implementation of awt components
• Solid Imaging performance

12
AWT
13
Binary Converter

• Converts statically existing Java byte code in
  .class format to a .NET assemblies (in MSIL
  format)
• Useful when Java source is not available
• Third party Java libraries in .class format

14
Binary Converter
15
Java-language IDE In VS.NET

• Project system
• Full VS.NET project system
• Upgrade VJ6 projects
• Language services
• Designers - ASP.NET Web Forms, Web Services
• Class View, Object Viewer
• Intellisense
• Debugger
• Java-language exceptions

16
Using J- Web Services, WinClient, and
WebClient- ASP.NET- Cross Language
17
Debugger

• .NET Debug Engine Multi language debugging
• All features of VS.NET debugger are available to
  Java-language programmers
• Full Support for Java-language Exceptions
• Java-language expression evaluator
• Locals
• Watch Window

18
Debugging
19
Availability

• Beta 2 available
• http//msdn.microsoft.com/visualj/
• Microsoft Java Language Conversion Assistant Beta
  1

20
Summary

• XML Web services are the solution to integration
• Microsoft has the best XML Web services platform
• Microsoft Visual J .NET provides XML Web
  services using the Java-language and protects
  customer investment

21
(No Transcript)