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Since 　 .NET Framework appears on the market inside Japan from March 2002,Up to now already a year superabundant.According to reckonning the standard is compositive the OS of.NET Framework- - Windows Server 2003 will appear on the market at was in Japan in May 2003.As.NET environment perfect,Contend as enough the system of Java builds a base,Development staff needs to know.NET Framework.The advantage that the author analyses.NET below and inferior position.XML Web service did not become the fuse 　 　 that popularizes.NET the people before this is thinking all the time:" to.NET,Whether to put in what be different from Java, distinctive applied domain and market?" .Inside 　 　 course of study think generally,System of Microsoft new generation builds an environment- - .NET Framework is what to development comes out is in on the foundation that studies Java.Not only function and framework likeness,And because be,after Java development comes out,The function that does not have because of this Java place is everywhere more visible.Realize function of process of incident drive application to wait in Web application for instance.Though,　 　 does not pass such,If just tell an user " .NET Framework is better than Java much " ,So the motive that Java develops personnel to turn designedly and uses.NET Framework won't be too strong.　 　 because Java already go ahead of the rest gathered extensive applied fruit,The experience that accumulated a lot of enough to offset its weakness and platform tool.Should not appear only the utility that Java uses hard and market,So.NET Framework develops further with respect to what prevent Java very hard.The advantage of.NET:Branch of business information system but 　 of 　 of proper motion process designing just began,Microsoft the dominant position that develops XML Web service to serve as.NET easily publicize substantially.With XML Web the service is premise and the.NET of the design and Web service have extremely tall endophilicity.But the generation that XML Web serves is later however.Although the to it expectation inside course of study and attention rate are higher,But because can make full use of,XML Web serves " can make money " business mode have not establish,Compare its market with Web site photograph at present so still negligible.Among them,The function that Java respect also is intensifying perfecting facilitating development XML Web to serve.　 　 so,The distinctive utility that whether is put in.NET?A result that the author gets through interviewing place is:.NET develops a tool- - of Visual Studo.NET use a gender easily to make it comes true very hard in Java " user enterprise (information system branch) also programmable system " on preterhuman directly.The author thinks the likelihood returns existence other such domain.Of course,Although the standard language VB.NET of.NET and C# are as complex like Java,But Visual Studo.NET eliminated this kind of complexity well however.　 　 for instance,Japanese orchid greens jade (NOEVIR) the information system branch that relies on oneself only finished Web factorial support a system arrive from layout the complete work of process designing.Compositive dealer ever represented a system of Japanese,In the user company that this bellwether joins Java system " the information system branch that chooses.NET is developed with respect to hopeful proper motion or undertake modification to the system " .　 　 author thinks,Because Java itself is relatively complex,And not easy study masters,Accordingly " user enterprise is in charge of layout only,And the phenomenon that commends process designing work completely compositive business is very common " .　 　 is mixed in COBOL VB (client business / server) flourishing period,Information system him branch is process designing, right the system undertakes the function is increased be modificationed partly mixing is very normal thing.If connect petty system to revise,wrap,So systematic maintenance cost nature will be very tall,Will lose flexibility accordingly.The professional ability that weakens information system branch likely still even.Respecting layout,Sound Orphean,But if join general case,also do not understand,It is very as difficult as development business bargaining to be afraid.A this perhaps is Java " malpractice " .　 　 in addition," cost is lower than UNIX " and " can make full use of Windows technology natural resources " wait for a reason to also be in those who quicken.NET Framework to gain ground.Carry as the client / the development environment of server system,The follow-up language of VB- - in.NET " Windows Form " have competition ability most.More and more systems are compositive business begins to choose this one tool to build a system.The inferior position of.NET:Little, open sex needs applied gain 　 　 on the contrary,The inferior position of.NET depends on the applied achievement in large system little, lack " open sex " .　 　 to applied achievement,Its amount will increase ceaselessly henceforth.It is reported,The system that Japanese Kabu.com negotiable securities will use.NET Framework to build this company to use ASP to build at present afresh in the round inside 2003 year.　 　 is in " open sex " respect will how?Java all-pervading is main the element is very much,But the author thinks among them the most crucial depend on " open sex " .Because can move on all sorts of OS,And business of a lot of development still provided Web application server and development tool,Because this user is OK random selection.And development business is passed in function and performance side mutual competition raises product level ceaselessly.　 　 and.NET Framework how?In wanting to apply at business system only,Its OS actually criterion can Windows of be confined to.Although Microsoft had offerred FreeBSD edition.NET Framework,But its purpose is confined to learning to consider.What people will expect 　 　 henceforth is Mono Project.Mono Project is to point to complete independence at the Microsoft, plan that developing.NET Framework of open source edition.What dominant should plan is a Linux enterprise that the name is Ximian,This company developed GNOME of environment of Linux standard desktop successfully,Already got at present the wide attention of industry.The Web that 　 　 should plan to still release moving Web to apply program ASP.NET in January 2003 serves software XSP.Although a lot of functions still are in development,But at present development work goes well.At present the front undertakes developing to Linux and Windows.Say according to Mono Project,The part that relies on Linux as a result of this software is not much,Can transplant easily to other UNIX OS accordingly.　 　 whether forming the open environment like Mono will be place of.NET all-pervading key.Microsoft has standardized orgnaization ECMA to industry at present (European computer Manufacturers Association) referred.NET standard,This action shows Microsoft will use open level.But still not be clear about this action at present is a kind of simple attitude only,True still wanting opens.NET.This is about to see Microsoft whether will continue to publish enough relative standard and information henceforth....