Qhov Tseem Ceeb Qhov txawv - Polymorphism vs Inheritance hauv OOP
Object-Oriented Programming (OOP) feem ntau yog siv los tsim software. Ntau hom lus programming txhawb nqa qhov programming. Object-oriented programming yog ib txoj hauv kev los tsim ib qho program siv cov chav kawm thiab cov khoom. Ib chav kawm hauv OOP yog daim ntawv qhia dav dav los tsim ib qho khoom. Ib chav kawm muaj cov khoom thiab cov txheej txheem. Ib yam khoom yog ib qho piv txwv ntawm chav kawm. OOP muaj plaub tus ncej xws li Inheritance, Polymorphism, Abstraction thiab Encapsulation. Kab lus no tham txog qhov sib txawv ntawm Polymorphism thiab Inheritance hauv OOP. Qhov sib txawv tseem ceeb ntawm Polymorphism thiab Inheritance hauv OOP yog tias Polymorphism yog lub peev xwm ntawm ib qho khoom coj los coj ua ntau txoj hauv kev thiab Inheritance yog tsim cov chav kawm tshiab siv cov khoom thiab cov txheej txheem ntawm cov chav kawm uas twb muaj lawm.
Polymorphism hauv OOP yog dab tsi?
Polymorphism yog qhia ntau hom ntawv. Ib yam khoom tuaj yeem muaj ntau yam cwj pwm. Polymorphism tuaj yeem muab faib ua ob pawg. Lawv ua ntau dhau thiab overriding.
Ntau tshaj
Saib cov program hauv qab no sau hauv Java.
Daim duab 01: Tshaj Tawm
Raws li cov kev pab cuam saum toj no, ib yam khoom ntawm hom A raug tsim. Thaum hu obj.sum(); nws yuav muab cov zis ntsig txog txoj kev sum(). Thaum hu rau obj.sum(2, 3); nws yuav muab cov zis ntsig txog cov lej (int a, int b). Nws tuaj yeem pom tias tib yam khoom muaj tus cwj pwm txawv nyob ntawm qhov xwm txheej. Thaum muaj ntau txoj hauv kev nrog tib lub npe, tab sis nrog cov tsis sib txawv, nws yog hu ua overloading. Nws tseem hu ua static binding lossis compile lub sij hawm polymorphism.
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws
Lwm hom Polymorphism yog overriding. Xa mus rau qhov program hauv qab no sau hauv Java.
Daim duab 02: Overriding
Raws li cov kev pab cuam saum toj no, muaj ib txoj kev tso tawm () hauv chav kawm A. Chav B txuas ntxiv los ntawm chav kawm A. Yog li ntawd, txhua txoj hauv kev hauv chav kawm A yog nkag tau los ntawm chav kawm B. Nws yog qub txeeg qub teg. Lub tswv yim qub txeeg qub teg tau piav qhia ntxiv tom qab.
Class B kuj muaj tib txoj kev tso tawm (). Thaum tsim ib yam khoom ntawm hom A thiab hu xov tooj qhia txoj kev, cov zis yuav muab B. Class A zaub hom yog overridden los ntawm chav kawm B zaub txoj kev. Yog li, cov zis yog B.
Thaum muaj txoj hauv kev nrog tib lub npe thiab tib qhov tsis sib xws tab sis nyob rau hauv ob chav sib txawv, thiab lawv txuas nrog qub txeeg qub teg nws yog hu ua overriding. Nws tseem hu ua Late binding, Dynamic Binding, Runtime Polymorphism. Overloading thiab overriding yog hu ua Polymorphism. Nws yog lub ntsiab lus tseem ceeb hauv Object Oriented Programming.
Dab tsi yog qhov cuab yeej cuab tam hauv OOP?
Saib cov program hauv qab no sau hauv Java.
Daim duab 03: Piv txwv ntawm Kev Tsim Txiaj Ntsig
Raws li cov kev kawm saum toj no, chav A muaj cov txheej txheem sum() thiab chav B muaj txoj kev sub().
Tus sum() txoj kev ntawm chav kawm A tuaj yeem siv hauv chav kawm B siv lo lus txuas ntxiv. Rov siv cov khoom thiab cov txheej txheem hauv chav kawm uas twb muaj lawm los tsim cov chav kawm tshiab yog hu ua Inheritance. Txawm tsis muaj sum() txoj kev nyob rau hauv chav kawm B; nws tau txais txiaj ntsig los ntawm chav kawm A. Cov cuab yeej cuab tam muaj txiaj ntsig zoo rau kev siv code rov siv tau. Cov hoob laus hu ua base class, superclass or parent class. Cov chav kawm muab tau yog hu ua subclass lossis cov menyuam kawm ntawv.
Type of Inheritance
Muaj ntau hom qub txeeg qub teg. Lawv yog Tib-Level Inheritance, Multi-Level Inheritance, Multiple Inheritance, Hierarchical Inheritance thiab Hybrid Inheritance.
Ib Sim Hawj
Nyob rau hauv Tib Txoj Cai, muaj ib chav kawm super thiab ib chav kawm sub. Yog tias chav kawm A yog chav kawm super thiab chav B yog chav kawm sub, tag nrho cov khoom thiab cov txheej txheem ntawm chav kawm A yog nkag tau los ntawm chav kawm B. Tsuas muaj ib theem xwb; yog li ntawd, nws thiaj hu ua ib theem qub txeeg qub teg.
Multi-Level Inheritance
Nyob hauv Multi-Level Inheritance muaj peb theem ntawm chav kawm. Cov chav kawm nruab nrab tau txais los ntawm cov chav kawm super. Cov chav kawm sub tau txais los ntawm cov chav kawm nruab nrab. Yog tias muaj peb chav kawm A, B thiab C thiab A yog chav kawm super thiab B yog chav kawm nruab nrab. Tom qab ntawd B tau txais los ntawm A thiab C tau txais los ntawm B, nws yog Multi-Level Inheritance.
Multiple Inheritance
Nyob rau hauv Ntau Qhov Kev Tsim Txiaj Ntsig, muaj ntau chav kawm super thiab ib chav kawm sub. Yog tias muaj peb chav kawm super hu ua A, B, C thiab D yog chav kawm sub, ces chav kawm D tuaj yeem tau txais txiaj ntsig los ntawm A, B thiab C. Ntau Qhov Kev Tshawb Fawb tau txais kev txhawb nqa hauv hom lus C ++. Nws tsis txaus siab hauv cov lus programming xws li Java lossis C. Interfaces yog siv los siv ntau yam cuab yeej cuab tam hauv cov lus no.
Hierarchical Inheritance
Yog tias muaj cov chav kawm hu ua A raws li cov chav kawm super thiab B, C yog cov chav kawm sub, cov chav kawm sub no tuaj yeem tau txais cov khoom thiab cov txheej txheem ntawm chav A. Hom kev qub txeeg qub teg hu ua Hierarchical Inheritance.
Hybrid Inheritance
Muaj lwm yam cuab yeej cuab tam tshwj xeeb uas hu ua Hybrid Inheritance. Nws yog kev sib txuas ntawm ntau theem thiab ntau yam qub txeeg qub teg. Yog tias A, B, C thiab D yog chav kawm thiab B tau txais los ntawm A thiab D yog qub los ntawm B thiab C, ces nws yog Hybrid qub txeeg qub teg.
Dab tsi yog qhov zoo sib xws ntawm Polymorphism thiab Inheritance hauv OOP?
Ob leeg yog cov ntsiab lus ntawm Object Oriented Programming
Qhov txawv ntawm Polymorphism thiab Inheritance hauv OOP yog dab tsi?
Polymorphism vs Inheritance in OOP |
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| Polymorphism yog ib lub peev xwm ntawm ib yam khoom coj los ua ntau yam. | Txoj kev cuab yeej cuab tam yog los tsim cov chav kawm tshiab siv cov khoom thiab cov txheej txheem ntawm cov chav kawm uas twb muaj lawm. |
| Polymorphism yog siv rau cov khoom los hu cov qauv twg ntawm kev sau lub sijhawm thiab lub sijhawm ua haujlwm. | Txoj kev cuab yeej cuab tam yog siv rau cov cai rov siv tau. |
| Polymorphism yog siv rau hauv txoj kev. | Txoj kev cuab yeej cuab tam yog siv hauv cov chav kawm. |
| Pawg | |
| Polymorphism tuaj yeem muab faib ua ntau dhau thiab overriding. | Cov cuab yeej cuab tam tuaj yeem muab faib ua ib theem, ntau theem, hierarchical, hybrid, thiab ntau yam qub txeeg qub teg. |
Summary – Polymorphism vs Inheritance in OOP
Polymorphism thiab Inheritance yog cov ntsiab lus tseem ceeb hauv Object Oriented Programming. Qhov txawv ntawm Polymorphism thiab Inheritance hauv OOP yog tias Polymorphism yog ib qho kev sib cuam tshuam rau ntau hom ntawv thiab Inheritance yog tsim cov chav kawm tshiab siv cov khoom thiab cov txheej txheem ntawm cov chav kawm uas twb muaj lawm. Ob lub ntsiab lus tau siv dav hauv Software Development.
Download the PDF Polymorphism vs Inheritance in OOP
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv ntawm Polymorphism thiab Inheritance hauv OOP
