lesson 1 - an introduction to java

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1、华中科技大学智能互联网技术湖北省重点实验室JavaProgrammingLanguageLESSON1–AnIntroductiontoJava吴砥wudi@hust.edu.cnDepartmentofElectronics&InformationEngineering,HuazhongUniversityofScience&Technology,Wuhan,Hubei,P.R.C.http://itec.hust.edu.cn华中科技大学智能互联网技术湖北省重点实验室Outline1.Java’spast,presentandfuture2.WhatisJa

2、va3.Java’sfeatures4.TheprogramtypesofJava5.Developmenttools6.ThefirstJavaprogram7.Javavs.otherlanguages8.Summary2JavaProgrammingLanguageWuDi20052008华中科技大学智能互联网技术湖北省重点实验室Java’sPast,PresentandFuture华中科技大学智能互联网技术湖北省重点实验室ComputerOrganization1.InputunitôMouse,keyboard2.OutputunitôMonitor,

3、printer,audiospeakers3.MemoryunitôRAM4.Arithmeticandlogicunit(ALU)ôPerformscalculations5.Centralprocessingunit(CPU)ôSupervisesoperationofotherdevices6.SecondarymemoryunitôHarddrives,floppydrives4JavaProgrammingLanguageWuDi20052008华中科技大学智能互联网技术湖北省重点实验室Programminglanguages1.Machinelang

4、uageô“Naturallanguage”ofcomputercomponentôMachinedependent2.AssemblylanguageôEnglish-likeabbreviationsrepresentcomputeroperationsôTranslatorprogramsconverttomachinelanguage3.High-levellanguageô“English-like”instructionsôCompilerconverttomachinelanguage5JavaProgrammingLanguageWuDi2005

5、2008华中科技大学智能互联网技术湖北省重点实验室Somerepresentativelanguages1.StructuralprogramminglanguageôFORTRAN(IBMMathematicalFORmulaTRANslation)ôBASIC(Beginner‘sAllPurposeSymbolicInstructionCode)ôCOBOL(CommonBusinessOrientedLanguage)ôPASCALôC2.Object-OrientedprogramminglanguageôC#(CSharp)ôC++ôObjectPa

6、scalôJavaôSmallTalkôAda6JavaProgrammingLanguageWuDi20052008华中科技大学智能互联网技术湖北省重点实验室WhodevelopsJava?1.TheJavalanguagewasdevelopedatSunMicrosystemsin1991aspartofaresearchprojecttodevelopsoftwareforconsumerelectronicsdevices.7JavaProgrammingLanguageWuDi2005华中科技大学智能互联网技术湖北省重点实验室Java’screato

7、r1.JavaisaprogramminglanguageandenviromentwhoseoriginalnamewasOakanddevelopedasapartoftheGreenprojectatSunstartedbyJamesGosling.8JavaProgrammingLanguageWuDi2005华中科技大学智能互联网技术湖北省重点实验室Java’sinitialgoal1.Java’sgoalsatthattimeweretobesmall,fast,efficient,andeasilyportabletoawiderangeofhar

8、dwaredevices