第二章 Java面向对象编程.pdf
上传人:qw****27 上传时间:2024-09-12 格式:PDF 页数:30 大小:212KB 金币:15 举报 版权申诉
预览加载中,请您耐心等待几秒...

第二章 Java面向对象编程.pdf

第二章Java面向对象编程.pdf

预览

免费试读已结束,剩余 20 页请下载文档后查看

15 金币

下载此文档

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•tracOOPofJavaJavaLanguage䲑ीᄨ䆐㑅⼺CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•tracᴀゴЏ㽕ݙᆍ•჉͸ᄰ㷴Ƞ้ᔰᕖДࣹ㐖ឮ•Ү⩗privateࣹpublic䃮䬝ԝ亟さ•ᐯऀ⼺Ꮎ⃤݊ᐩᎥ݌໺ࡅ̯͙ᄨ䆐•䄲⩗ᄨ䆐⮳᫨∄•᣾䔟Ჳ䕏ܬ᪟•᫨∄⮳䛼䒬้̽ᔰ•᣾䔟this̽superᑄ⩗⮳⩗䕃SoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac1䴶৥ᇍ䈵ⱘὖᗉ•OOⱘϪ⬠㾖•••ϔߛⱚᇍ䈵(Everythingisobject!)–ᇍ䈵ᰃ䕃ӊᢑ䈵Ϣ໡⫼ⱘ෎ᴀ㒧ᵘऩܗ–㉏ᰃᇍ䈵㉏ൟ(Type)ⱘᅮНAclassisablueprintorprototypefromwhichobjectsarecreated.–ᇍ䈵ᰃ㉏⢊ᗕ࣪ⱘᅲ՟Anobjectisasoftwarebundleofrelatedstateandbehavior.SoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac1䴶৥ᇍ䈵ⱘὖᗉ•OOP䇁㿔᳝ϝϾ⡍ᕕ˖–ᇕ㺙˄Packaging/Encapsulated˅–໮ᗕᗻ˄Polymorphism˅–㒻ᡓ˄Inheritance˅Java̽C++⮳̼ऻ喚JavaC++㏞㇨⮳䲑ीᄨ䆐䄜㼯㐂Ჳࡅ̽OO⮳⌦ष҂䃧ㆪ⮳้䛼㐖ឮٰ䃧้䛼㐖ឮٰ̼̼ႇ౗ᠶ䦷ञДҮ⩗ᠶ䦷Ү⩗“.”ႇअᄨ䆐᜿ইҮ⩗“喚喚”ႇअᄨ䆐᜿ইҮ⩗“import”࠴ग़ㆪ࠴Ү⩗“include”࠴ग़ㆪᏂᣔऒ喈Interface喉ㆪᬏ៬䆐ㆪᝅ៬䆐᫨∄㮉ܬ᪟SoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac2classⱘᅮНϢᇍ䈵Փ⫼•ᅮНϔϾJava㉏[<modifiers>]class<name>{}classEmpInfo{Stringname;Stringdesignation;Stringdepartment;voidprint(){System.out.println(name+"is"+designation+"at"+department);}}[<modifiers>]喚ႇअԝ亟さ喌ञҮ⩗publicȠdefaultԝ亟さ<name>喚ㆪ़ᴶ⹩さ喌ᰯຬ䖤ႷJavaব़㻳㠲SoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac2classⱘᅮНϢᇍ䈵Փ⫼•㉏ⱘᅲ՟࣪੠Փ⫼EmpInfoemployee=newEmpInfo();//createsinstanceemployee.name="RobertJavaman";//initializesemployee.designation="Manager";//thethreeemployee.department="CoffeeShop";//membersemployee.print();//printsthedetails⊼ᛣ˖ϔϾ㉏ᖙ乏೼߯ᓎᅗⱘᇍ䈵˄ᅲ՟࣪˅ৢᠡ㛑Փ⫼݊ሲᗻϢᮍ⊩SoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac2classⱘᅮНϢᇍ䈵Փ⫼ᄬপׂ佄ヺ•佄ヺৠ㉏ৠࣙᄤ㉏䗮⫼ᗻׂpublicĜĜĜĜprotectedĜĜĜ㔎ⳕⱘĜĜprivateĜSoftwareEngineeringSchoolofCQU.Copyright2008.CH•XANGDFEPwClicktobuyNOW!wmowc.dk.ocu•trac2classⱘᅮНϢᇍ䈵Փ⫼•ᮍ⊩ⱘໄᯢ[<modifiers>]<return_type><name>([<argument_list>])<bl