Video: Dab tsi yog qhov sib xyaw tsim qauv hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Composite tsim qauv piav qhia txog pawg ntawm cov khoom uas tuaj yeem kho tib yam li ib qho piv txwv ntawm tib yam khoom. Cov kev sib xyaw qauv tso cai rau peb "suab" cov khoom rau hauv cov qauv ntoo los sawv cev rau tag nrho cov hierarchies.
Ib yam li ntawd, qhov twg zoo tshaj plaws txhais tau tias siv cov qauv tsim qauv sib xyaw?
Composite Design Pattern . Composite qauv yog partitioning tsim qauv thiab piav qhia txog ib pawg ntawm cov khoom uas raug kho tib yam li ib qho piv txwv ntawm tib yam khoom. Lub hom phiaj ntawm a sib xyaw yog "compose" cov khoom rau hauv cov qauv ntoo los sawv cev ib feem-tag nrho hierarchies.
Ib tug kuj yuav nug, dab tsi yog kev siv cov qauv tsim? Cov qauv tsim yog cov txheej txheem siv los ntawm cov neeg tsim khoom los daws cov teeb meem kev teeb tsa uas lawv feem ntau ntsib thaum tsim ib qho daim ntawv thov . Cov no qauv nce code nyeem tau thiab txo cov lej hloov pauv hauv qhov chaws thaum twg koj xav tau kho cov kab laum, lossis ntxiv qhov tshiab.
Kuj paub, tus qauv tsim hauv Java yog dab tsi?
Cov qauv tsim sawv cev rau cov kev coj ua zoo tshaj plaws uas siv los ntawm cov kws paub txog cov khoom siv software tsim tawm. Cov qauv tsim yog cov kev daws teeb meem rau cov teeb meem dav dav uas software tsim tawm tau ntsib thaum tsim software.
Cov khoom sib xyaw yog dab tsi?
Cov khoom sib xyaw (VaryDisp khoom ) yog ib txheej ntawm ntau chav kawm uas tso cai rau tus programmer los sau ib leeg COM khoom los ntawm uas twb muaj lawm khoom thiab scripts. Cov khoom sib xyaw yog ob peb khoom thiab scripts bundled ua ke raug rau daim ntawv thov raws li ib tug khoom.
Pom zoo:
Dab tsi yog qhov tsim qauv tsim qauv tsim thiab lub cev database tsim?
Logical database modeling suav nrog; ERD, daim duab ua lag luam, thiab cov ntaub ntawv tawm tswv yim rau cov neeg siv; whereasphysical database modeling suav nrog; server qauv daim duab, database tsim cov ntaub ntawv, thiab cov neeg siv cov ntaub ntawv tawm tswv yim
Dab tsi yog qhov sib xyaw hauv OOP nrog piv txwv?
Kev sib xyaw yog ib qho ntawm cov ntsiab lus tseem ceeb hauv cov phiaj xwm kev taw qhia. Nws piav txog ib chav kawm uas hais txog ib lossis ntau yam khoom ntawm lwm chav kawm hauv cov piv txwv piv txwv. Qhov no tso cai rau koj los ua qauv muaj kev sib koom ua ke ntawm cov khoom. Koj tuaj yeem pom cov kev sib raug zoo li no tsis tu ncua hauv lub ntiaj teb tiag
Dab tsi yog qhov sib txawv ntawm cov qauv siv nyob rau hauv cov ntaub ntawv ntawm cov khoom oriented qauv?
Cov qauv tseem ceeb ntawm cov qauv uas siv rau hauv cov khoom siv yog: Siv cov qauv qauv, Cov qauv qauv (zoo li qub) cov qauv, Cov qauv coj tus cwj pwm (dynamic) khoom qauv
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab qhov qub txeeg qub teg?
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Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv