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1、北方民族大学毕业设计英文翻译系(部)名称:计算机科学与工程学院学生姓名:专业:学号:指导教师姓名:北方民族大学教务处制13目录Mobileapplicationplatform-J2MEprofile31whatistheJ2ME32What'sNewintheJ2MEWirelessToolkit2.242.1Mobile3DGraphics:42.2MultimediaMessaging:52.3BluetoothandOBEX:52.4Wirelessdevelopmentkit（WTK）：62.5J2medigitalsignature：72.6LocalFil
2、esandPersonalInformation：7移动设备的应用平台—J2ME简介91什么是J2ME:92J2MEWirelessToolkit2.2新改进102.1移动3D图形:102.2多媒体通信:102.3蓝牙和OBEX：112.4无线开发工具包（WTK）：112.5J2me数字签名：122.6本地文件和个人信息:1213Mobileapplicationplatform-J2MEprofile1whatistheJ2MEJ2ME(Java2MicroEdition)isaJava2asanintegralpartofitwithJ2SE,J2EEsaid.Ac
3、cordingtoSun'sdefinition:J2MEisahighlyoptimizedJavaruntimeenvironment,mainlyforconsumerelectronicsdevicessuchascellularphonesandvideophones,digitalset-topboxes,carnavigationsystemsandsoon.J2MEtechnologyin1999,theJavaOneDeveloperConferenceontheformallaunchoftheGeneralAssembly,whichwilloft
4、heJavalanguageandplatform-independentfeaturesintoasmallelectronicdevicethatallowsmobilewirelessdevicessharingbetweenapplications. J2MEinitsdesignspecifications,tofollowa"varietyofdevicestocreateasingledevelopmentsystemismeaningless"thebasicprinciples.SofirstofallJ2MEembeddeddevicesgener
5、allydividedintotwotypes:Oneisthelimitedcomputing,powersupplyisalsolimitedembeddeddevices(forexample,PDA,cellphone);anotherkindofcomputingpowerisrelativelybetter,Andinthepowersupplyisrelativelysufficientforembeddeddevices(forexample,airconditioners,refrigerators,TVset-topboxes(set-topbox)
6、).Becausethesetwotypesofembeddeddevices,JavaiswhytheintroductionofaconceptcalledConfiguration,andthentheoperationoftheabovefeaturesarelimited,limitedthepowerofthedeviceembeddedinthedefinitionofConnectedLimitedDeviceConfiguration(CLDC)specificationsare;andtheotheroneTostandardizethetypeso
7、fdevicesareConnectedDeviceConfiguration(CDC)specifications.Inotherwords,J2MEfirstofallembeddeddevicesusingtheConfigurationconceptofseparateintotwokindsofabstractpatterns. Infact,everyoneherecanbeaConfigurationforJ2MEtwotypesofspecificationsforembeddeddevices,whichdefines
