Exposingcn163

cn163.net  时间:2021-03-02  阅读:()
IKVM.
NETBuildingaJavaVMonthe.
NETFrameworkJeroenFrijtersWhoamIJeroenFrijters/YeroonFrighters/Co-founderofasmallISVinTheNetherlandsLeaddeveloperofIKVM.
NETanOpenSourceJVMfor.
NETWhatisIKVM.
NETJavaVMontopof.
NET&Mono–JITcompilertotranslateJavabytecodeintoMSIL–Reflection–Etc.
StaticcompilerthattranslatesJavaclasses/jarsinto.
NETassemblies–BasicallyaheadoftimecompilerforabovementionedJIT.
NETportofOpenJDKclasslibrary–Somegaps,butmostAPIspartof"Java"areavailableWhyisIKVM.
NETStartedinthespringof2002asanexperimentMyblogonJune19th,2002:"IhavealargeJavaapplicationthatIwouldliketoslowlymigrateto.
NET,inordertobeabletodothat,IneedawaytointeroperatewithJavacode,theexistingsolutionsIhavelookedatareinadequate.
Besides,It'slotsoffuntobuildsomethinglikethis:-)"CompatibilityJava7–BasedOpenJDKclasslibrarywithoutthenativecode.
–Swing/AWT/Fonts/Graphics/Printingnotsupported.
TherearesomeminorVMlevelincompatibilities,butsofarthesearejusttheoretical.
Practicalsourcesofincompatibilities:–sun.
*packages–"Theclassloaderproblem"[System|IKVM].
ReflectionThankstoAppDomain.
TypeResolveeventitispossibletobuildamanaged"JIT".
But,System.
Reflectionhassomeseriouslimitationsforcompilers.
IKVM.
Reflectionisnowusedbyikvmc,MonoC#compiler,Scala.
NETandothers.
TypeSystemcli.
System.
Objectextendsjava.
lang.
Objectjava.
lang.
Object:System.
Objectjava.
lang.
Stringisonlyacontainerforstaticmethods.
InstancesarealwaysSystem.
String.
cli.
System.
Exceptionsextendsjava.
lang.
Throwablejava.
lang.
Throwable:System.
Exception(checkedexceptions)TypeSystemcont.
java.
lang.
Comparable:System.
IComparablejava.
lang.
Cloneable,java.
io.
Serializable&java.
lang.
CharSequenceneedtobespecialcased(stringsandarrays)Exposing.
NETfeaturestoJavaDelegatesByRefmethodargumentsCustomattributesValueTypesEnumsProperties&EventsDelegatesinJavapublicfinalclassRunnableDelegateextendscli.
System.
MulticastDelegateimplementsRunnable{publicRunnableDelegate(Methodm){}publicnativevoidInvoke();publicinterfaceMethod{voidInvoke();}publicvoidrun(){Invoke();}}DelegatesinJavapackageikvm.
runtime;publicfinalclassDelegates{publicstaticRunnabletoRunnable(RunnableDelegatedelegate){returndelegate;}}java.
lang.
Threadthread=newjava.
lang.
Thread(ikvm.
runtime.
Delegates.
toRunnable(delegate{Console.
WriteLine("HelloWorld");}));thread.
start();ByRefMethodArgumentsSameasinJava,hackitwithanarrayWouldliketousegenerics,buterasuremakesthishard(duetoinabilitytodomethodoverloading)CustomAttributesExposingthemasannotationsworks(mostofthetime)packagesun.
misc;classUnsafe{@SecurityPermissionAttribute.
Annotation(value=SecurityAction.
__Enum.
LinkDemand,UnmanagedCode=true)@cli.
System.
Security.
SecurityCriticalAttribute.
AnnotationpublicvoidfreeMemory(longaddress){Marshal.
FreeHGlobal(IntPtr.
op_Explicit(address));}}ValueTypesWeaksupport:–YoucanonlyusethemfromJava,notdefinethem.
–Willusuallybeboxed.
EnumsWouldliketheabilitytodomethodoverloadingbasedonenumtypeNeedabilityto"bittwiddle"Usableincustomattributeannotationspackagecli.
System;publicfinalclassDayOfWeekextendscli.
System.
Enum{publicstaticfinalintSunday=0;publicstaticfinalintMonday=1;…publicfinalintValue;publicstaticnativeDayOfWeekwrap(inti);}Properties&EventsNospecialsupportDirectlyusetheunderlyingmethodsimportcli.
System.
Windows.
Forms.
*;classDemo{publicstaticvoidmain(String[]args){Formform=newForm();form.
set_Width(400);form.
set_Height(400);form.
add_FormClosing(newFormClosingEventHandler(newFormClosingEventHandler.
Method(){publicvoidInvoke(Objectsender,FormClosingEventArgsargs){System.
out.
println("Closing.
.
.
");}}));Application.
Run(form);}}ExposingJavato.
NETKeepingIntelliSensecleanStaticfieldsininterfacesAnnotationsGenericsWorkaroundsExposingJavato.
NETKeepingIntelliSensecleanStaticfieldsininterfacesAnnotationsGenericsWorkarounds__WorkaroundBaseClass__publicabstractclassBase{protectedabstractvoidM();}publicabstractclassDerived:Base{publicoverridevoidM(){}}classProgram:Derived{}errorCS0534:'Program'doesnotimplementinheritedabstractmember'Base.
M()'publicabstractclassBase{protectedabstractvoidM();}[HideFromJava][EditorBrowsable(EditorBrowsableState.
Never)]publicabstract__WorkaroundBaseClass__Derived:Base{protectedoverridevoidM(){thrownewAbstractMethodError();}}publicabstractclassDerived:__WorkaroundBaseClass__Derived{publicoverridevoidM(){}}__WorkaroundBaseClass__classProgram:Derived{}Interop"Magic"Limitedsupportforautomagic.
NETserializationsupportforJavaserializableclasses.
NETexceptionsareserializedascom.
sun.
xml.
internal.
ws.
developer.
ServerSideExceptionjava.
io.
Closeable=>System.
IDisposablejava.
lang.
Iterable=>System.
IEnumerablejava.
lang.
AutoCloseableSystem.
IDisposable"JarHell"HardtodeterminejardependenciesCirculardepenciesoccurmoreoftenthanyou'dthinkikvmc{foo.
jar-out:Foo.
dll}{bar.
jar-out:Bar.
dll}PerformanceTypicallyprettygood.
NEToftenwinsonstringprocessingExceptionheavycodesuffersDon't"benchmark"underthedebugger!
UsersSeveralcommercialandopensourceapplicationsuseIKVM.
NET"AtmycompanywearestillamazedtoseelargepartofourJavasystemsuccessfullyrunningon.
NETplatformthankstoIKVM.
"AndyMalakov,DeltixLab,Inc.
"WeareveryhappywithIKVM.
ItenablesustodevelopourcorelibrariesinJavaandcompileforusein.
NET.
TheIKVMteamisveryresponsiveandknowledgeableabouttheissueswewerefacing.
"ShamusNeville,eTradingandAnalyticsGroupatHSBC"HavingusedIKVMforoverayear,wehavefoundIKVMtoworkreliablyandofferproductionqualityoperation.
Theonetimewherewedidrunintosomespecificproblem,theopensourcenatureofIKVMallowedustoquicklytrackdownthebugandverifythecauseoftheproblem.
Wehadafixfortheproblemtheverysameday.
"OttoPerdeck,ChordiantSoftwareMoreathttp://www.
ikvm.
net/stories.
htmlQuestionsMoreInformationProjectWebsite:http://www.
ikvm.
net/jeroen@frijters.
nethttp://weblog.
ikvm.
net/@JeroenFrijters

pacificrack:超级秒杀,VPS低至$7.2/年,美国洛杉矶VPS,1Gbps带宽

pacificrack又追加了3款特价便宜vps搞促销,而且是直接7折优惠(一次性),低至年付7.2美元。这是本月第3波便宜vps了。熟悉pacificrack的知道机房是QN的洛杉矶,接入1Gbps带宽,KVM虚拟,纯SSD RAID10,自带一个IPv4。官方网站:https://pacificrack.com支持PayPal、支付宝等方式付款7折秒杀优惠码:R3UWUYF01T内存CPUSS...

妮妮云(119元/季)日本CN2 2核2G 30M 119元/季

妮妮云的知名度应该也不用多介绍了,妮妮云旗下的云产品提供商,相比起他家其他的产品,云产品还是非常良心的,经常出了一些优惠活动,前段时间的八折活动推出了很多优质产品,近期商家秒杀活动又上线了,秒杀产品比较全面,除了ECS和轻量云,还有一些免费空间、增值代购、云数据库等,如果你是刚入行安稳做站的朋友,可以先入手一个119/元季付的ECS来起步,非常稳定。官网地址:www.niniyun.com活动专区...

BeerVM1GB内存/VDSps端口1GB,350元/月

beervm是一家国人商家,主要提供国内KVM VPS,有河南移动、广州移动等。现在预售湖南长沙联通vds,性价比高。湖南长沙vps(长沙vds),1GB内存/7GB SSD空间/10TB流量/1Gbps端口/独立IP/KVM,350元/月,有需要的可以关注一下。Beervm长沙联通vps套餐:长沙联通1G青春版(预售)长沙联通3G标准版(预售)长沙联通3G(预售)vCPU:1vCPU:2vCPU...

cn163.net为你推荐
漏洞nod32回收卡巴斯基formgraph伺服器win7支持ipadphotoshop技术ps几大关键技术?ms17-010win10蒙林北冬虫夏草酒·10年原浆1*6 500ml 176,176是一瓶的价格还是一箱的价格联通iphone4联通iphone4合约迅雷雷鸟100+怒放手机是迅雷做的么?迅雷之前不是出了一款雷鸟手机么?www.baidu.jpbaidu 百度
已备案域名注册 最新代理服务器地址 187邮箱 香港bgp机房 hostmaster 独享100m 国外主机 主机点评 dreamhost cve-2014-6271 韩国电信 缓存服务器 dd444 腾讯云分析 大容量存储器 网站木马检测工具 idc是什么 息壤代理 t云 万网主机管理 更多