java練習(xí)冊(cè)(009)--類(1)

1、java課程實(shí)踐指導(dǎo)書課程實(shí)踐指導(dǎo)書文件編號(hào)：YMWI19文件版本：A版文件頁碼：pageof練習(xí)冊(cè)練習(xí)冊(cè)——JAVAJAVA篇JAVAJAVA語言中的類（語言中的類（1）一、練習(xí)目標(biāo):如何在JAVA中構(gòu)造一個(gè)類。二、練習(xí)時(shí)間與作業(yè)要求：本次練習(xí)一共需要180分鐘。翻譯練習(xí)寫在JAVA筆記本上，書面作業(yè)寫在JAVA家庭作業(yè)本上。后面的書面作業(yè)不包括在這個(gè)時(shí)間范圍內(nèi)。三、翻譯練習(xí)：將下面要求翻譯的內(nèi)容，寫在記事本上（陰影部分不寫出來，要求

2、看懂）1.EverythingEverythingisisananobject.object.Thinkofanobjectasafancyvariableitstesdatabutyoucan“makerequests”tothatobjectaskingittoperfmoperationsonitself.Intheyyoucantakeanyconceptualcomponentintheproblemyou’retryingt

3、osolve(dogsbuildingsservicesetc.)representitasanobjectinyourprogram.2.Aprogramprogramisisabunchbunchofofobjectsobjectstellingtellingeacheachotherotherwhatwhattotododobybysendingsendingmessagesmessages.Tomakearequestofano

4、bjectyou“sendamessage”tothatobject.Meconcretelyyoucanthinkofamessageasarequesttocallamethodthatbelongstoaparticularobject.3.EachEachobjectobjecthashasitsitsownownmemymemymademadeupupofofotherotherobjectsobjects.Putanothe

5、rwayyoucreateanewkindofobjectbymakingapackagecontainingexistingobjects.Thusyoucanbuildcomplexityintoaprogramwhilehidingitbehindthesimplicityofobjects.4.EveryEveryobjectobjecthashasatypetype.Usingtheparlanceeachobjectisan

6、java課程實(shí)踐指導(dǎo)書課程實(shí)踐指導(dǎo)書文件編號(hào)：YMWI19文件版本：A版文件頁碼：pageofinstanceofaclassinwhich“class”issynonymouswith“type.”Themostimptantdistinguishingacteristicofaclassis“Whatmessagescanyousendtoit”5.AllAllobjectsobjectsofofaparticularparticu

7、lartypetypecancanreceivereceivethethesamesamemessagesmessages.Thisisactuallyaloadedstatementasyouwillseelater.Becauseanobjectoftype“circle”isalsoanobjectoftype“shape”acircleisguaranteedtoacceptshapemessages.Thismeansyouc

8、anwritecodethattalkstoshapesautomaticallyhleanythingthatfitsthedeionofashape.ThissubstitutabilityisoneofthepowerfulconceptsinOOP.四、上機(jī)練習(xí)：1、定義一個(gè)判斷閏年的方法，在main方法中調(diào)用該方法判斷輸入的一個(gè)年份是否是閏年2、編寫一個(gè)立方體類，包含這樣的屬性：長(zhǎng)度、寬度、高度等信息，通過方法來計(jì)算它的體積。