第二章 java面向对象编程

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1、F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•trackocu•trackJava䲑ीᄨ䆐㑅⼺OOPofJavaLanguageF•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•trackᴀゴЏ㽕ݙᆍocu•track•჉͸ᄰ㷴Ƞ้ᔰᕖДࣹ㐖ឮ•Ү⩗privateࣹpublic䃮䬝ԝ亟さ•ᐯऀ⼺Ꮎ⃤݊ᐩᎥ݌໺ࡅ̯͙

2、ᄨ䆐•䄲⩗ᄨ䆐⮳᫨∄•᣾䔟Ჳ䕏ܬ᪟•᫨∄⮳䛼䒬้̽ᔰ•᣾䔟this̽superᑄ⩗⮳⩗䕃SoftwareEngineeringSchoolofCQU.Copyright2008.F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•track1䴶৥ᇍ䈵ⱘὖᗉocu•track•OOⱘϪ⬠㾖•••ϔߛⱚᇍ䈵(Everythingisobject!)–ᇍ䈵ᰃ䕃ӊᢑ䈵Ϣ໡⫼ⱘ෎ᴀ㒧ᵘऩܗ–㉏ᰃᇍ䈵㉏ൟ(Type)ⱘᅮНA

3、classisablueprintorprototypefromwhichobjectsarecreated.–ᇍ䈵ᰃ㉏⢊ᗕ࣪ⱘᅲ՟Anobjectisasoftwarebundleofrelatedstateandbehavior.SoftwareEngineeringSchoolofCQU.Copyright2008.F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•track1䴶৥ᇍ䈵ⱘὖᗉocu•tra

4、ck•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ឮ̼ႇ౗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.Copyri

5、ght2008.F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•track2classⱘᅮНϢᇍ䈵Փ⫼ocu•track•ᅮНϔϾJava㉏[]class{}classEmpInfo{Stringname;Stringdesignation;Stringdepartment;voidprint(){System.out.println(name+"is"+designatio

6、n+"at"+department);}}[]喚ႇअԝ亟さ喌ञҮ⩗publicȠdefaultԝ亟さ喚ㆪ़ᴶ⹩さ喌ᰯຬ䖤ႷJavaব़㻳㠲SoftwareEngineeringSchoolofCQU.Copyright2008.F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•track2classⱘᅮНϢᇍ䈵Փ⫼ocu•track•㉏ⱘᅲ՟࣪੠Փ⫼EmpInfoemploye

7、e=newEmpInfo();//createsinstanceemployee.name="RobertJavaman";//initializesemployee.designation="Manager";//thethreeemployee.department="CoffeeShop";//membersemployee.print();//printsthedetails⊼ᛣ˖ϔϾ㉏ᖙ乏೼߯ᓎᅗⱘᇍ䈵˄ᅲ՟࣪˅ৢᠡ㛑Փ⫼݊ሲᗻϢᮍ⊩SoftwareEngineeringSchoolofCQU

8、.Copyright2008.F•XCHANGF•XCHANGDEDEPPwwClicktobuyNOW!ClicktobuyNOW!wmwmwowo.d.c.d.cocu•track2classⱘᅮНϢᇍ䈵Փ⫼ocu•track•ᄬপ佄ヺ佄ヺৠ㉏ৠࣙᄤ㉏䗮⫼ᗻpublicřřřřprotectedřřř㔎ⳕⱘřřprivateřSoftwareEngineeringSchoolofCQU.Copyright2008.F•XCHANGF•X