Puas muaj kev sib raug zoo siv?
Puas muaj kev sib raug zoo siv?

Video: Puas muaj kev sib raug zoo siv?

Video: Puas muaj kev sib raug zoo siv?
Video: Nrog Vajtswv Sib Raug Zoo (official MUSIC VIDEO) N. Vajxob Xyooj 2024, Kaum ib hlis
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Hauv Java, a Muaj -A kev sib raug zoo tsuas yog txhais tau tias ib qho piv txwv ntawm ib chav kawm muaj ib qho kev siv rau ib qho piv txwv ntawm lwm chav kawm lossis lwm qhov piv txwv ntawm tib chav kawm. Piv txwv li, ib lub tsheb muaj ib engine, aub muaj ib tail. Hauv Java, tsis muaj lo lus tseem ceeb uas siv a Muaj -A kev sib raug zoo.

Ib yam li ib tug yuav nug, puas yog Versus muaj kev sib raug zoo?

Txhua qhov chaw koj pom ib lo lus txuas ntxiv los yog siv lo lus tseem ceeb hauv kev tshaj tawm hauv chav kawm, tom qab ntawd chav kawm no yog hais tias muaj YOG -A kev sib raug zoo . HAS-A kev sib raug zoo : Composition( YOG -A) tsuas yog txhais tau tias siv cov piv txwv hloov pauv uas yog hais txog lwm yam khoom. Piv txwv li Maruti muaj Cav, los yog Tsev muaj Chav dej.

Tsis tas li ntawd, puas yog ib feem ntawm kev sib raug zoo? “IS-A” kev sib raug zoo yog tag nrho raws li Inheritance, uas tuaj yeem yog ob hom Class Inheritance lossis Interface Inheritance. Piv txwv li yog "Apple yog txiv hmab txiv ntoo", "Ferrari yog lub tsheb". Composition yog " ib feem ntawm "kev sib raug zoo . Tsuas yog kev sib xyaw txhais tau tias yog siv cov piv txwv sib txawv uas yog siv rau lwm yam khoom.

Kuj paub, yog A thiab muaj kev sib raug zoo hauv DBMS?

Hauv kev tsim database, object-oriented programming thiab tsim (saib object oriented program architecture), muaj -a (has_a or muaj a) yog kev sib sau kev sib raug zoo qhov twg ib yam khoom (feem ntau hu ua cov khoom tsim, los yog ib feem / constituent / cov tswv cuab cov khoom) "yog" (yog ib feem lossis cov tswv cuab ntawm) lwm yam khoom (hu ua cov khoom sib xyaw

Puas yog kev sib raug zoo piv txwv?

Hauv Object oriented programming, IS-A kev sib raug zoo txhais tias "ib yam khoom yog hom ntawm lwm tus". YOG-A relation txhais tau tias Inheritance methodology. Nyob rau hauv Java, Inheritance tuaj yeem siv tau nrog txuas ntxiv (hauv chav kawm) thiab siv (thaum interface) cov ntsiab lus. Ib qho yooj yim piv txwv ntawm YOG-A relation : Dell IS-A laptop.

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