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1、java新手入门的30个基本概念(30basicconceptsofnoviceJava)30basicconceptsofnoviceJavaInourprocessoflearningJava,graspthebasicconceptswhichbothJ2SE,onourstudyofJ2EE,J2MEisveryimportant,J2SEisthefoundationofJava,soitisnecessarytodothebasicconceptofinduction,inordertobettertheessenceof
2、everyoneinthelearningprocessintheunderstandingoftheJava・HereIsummarize30basicconcepts・Javaoverview:Atpresent,JavaismainlyusedinthedevelopmentofMiddleware(Middleware)communicationtechnology-processingclienttotheserver,thatearlypractice,thedevelopmentofJavaisnotsuitablefo
3、rPCapplications,itsdevelopmenthasgraduallybecomeahandhelddeviceinthedevelopmentofInternet,informationstationandon-boardcomputer・Javadevelopmentisdifferentfromotherlanguageswhentheprogramisrunningtoprovideplatformindependenee,saidinwindows,Solaris,usethesamecodeforother・
4、JavaoperatingsystemontheLinuxgrammarandC++syntaxissimilar,C++/Cprogrammerscaneasilygrasp,andJavaiscompletelyobject-orientedcompletely,whichprovidesgoodGC(GarbageCollector)garbagedisposalmechanismtopreventmemoryoverflow.Java'swhitepapergivesus11keyfeaturesoftheJavalangua
5、ge・(1)thesyntaxofEasy:JavathanC++isrelativelysimple,isanotheraspectoftheJavacanmakethesoftwarerunningonasmallmachine,andexplainthefoundationclasslibrarysupportisaboutthesizeof40KB,increasethebasicstandardlibraryandthreadsupportmemoryneedtoincrease125kb・(1):Javawithdistr
6、ibutedTCP/IPprotocolfamilyisapowerfullibraryofroutines,JavaapplicationscanthroughURLthroughthenetworktoaccesstheremoteobject,duetotheservletmechanism,theJavaprogramisveryhigh,andnowmanylargewebserversupportservlet・(2)00:objectorienteddesignisaprogrammingtechniquethatfoc
7、usesontheinterfacebetweenobjectsandobjects・TherearemanydifferencesbetweenobjectorientedandC++,indealingwithmultipleinheritanceandtheoriginalmodelofJava・(3)robustfeatures:Javatakesasecuritypointermodelthatreducesthepossibilityofoverwritingmemoryanddatacrashes.(4)security
8、:Javaisusedtodesignnetworksanddistributedsystems,whichbringsnewsecurityissues,Javacanbeusedtobuildanti-virusan
