Video: Dab tsi yog qhov zoo ntawm chav kawm abstract hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov qhov zoo siv ib chav kawm abstract yog tias koj tuaj yeem pab pawg ntau yam chav kawm ua ke ua kwv tij. Pab pawg chav kawm ua ke yog qhov tseem ceeb hauv kev ua kom muaj kev sib koom ua ke thiab nkag siab. Cov chav kawm Abstract yog cov qauv rau yav tom ntej tshwj xeeb chav kawm.
Kuj paub, vim li cas peb thiaj xav tau chav kawm paub daws teeb meem hauv Java?
Java Abstract class tuaj yeem siv cov interfaces yam tsis tau muab kev siv cov txheej txheem interface. Java Abstract class yog siv los muab txoj kev siv rau tag nrho cov subclasses los yog muab kev siv ua ntej. Peb ua tau khiav abstract class hauv java zoo li lwm yam chav kawm yog tias nws muaj txoj hauv kev tseem ceeb.
Ib tug kuj yuav nug, vim li cas peb yuav tsum siv chav kawm paub daws teeb es tsis yog chav kawm ib txwm? Abstract chav kawm hauv paus tso cai rau peb muab kev ua haujlwm tsis zoo rau txhua tus menyuam chav kawm los ntawm tsis- abstract txoj kev. Yog li siv chav kawm paub daws teeb meem ntawm pob zeb chav kawm . Thiab thaum twg peb sim tsim cov khoom ntawm ib qho chav kawm abstract tus neeg siv yuav tau txais qhov yuam kev ntawm kev sib sau xwb ntawm lub sijhawm khiav. Yog li, nws muaj kev nyab xeeb chav kawm abstract.
Ua raws li qhov no hauv kev xav, dab tsi yog qhov ntsiab lus ntawm cov chav kawm paub daws teeb meem?
Lub hom phiaj ntawm ib chav kawm abstract yog los txhais qee tus cwj pwm uas tuaj yeem tau txais los ntawm ntau lub subclasses, tsis tas siv tag nrho chav kawm . Hauv C#, lub abstract lo lus tseem ceeb xaiv ob qho tib si chav kawm abstract thiab ib txoj kev ntshiab virtual.
Dab tsi yog qhov txawv ntawm chav kawm abstract thiab chav kawm ib txwm?
Qhov tiag xwb txawv yog tias yog pob zeb chav kawm tuaj yeem ua tau sai vim tias nws muab (lossis qub txeeg qub teg) kev siv rau txhua txoj hauv kev. Ib chav kawm abstract tsis tuaj yeem ua sai sai vim tias tsawg kawg ib txoj hauv kev tsis tau ua tiav. Cov chav kawm Abstract yog txhais tau tias yuav ncua.
Pom zoo:
Dab tsi yog qhov txawv ntawm chav kawm sab hauv thiab cov chav nested?
Cov chav kawm uas tau tshaj tawm yam tsis siv qhov zoo li qub yog hu ua chav kawm sab hauv lossis chav kawm tsis zoo li qub. Cov chav kawm Staticnested yog chav kawm zoo li lwm cov tswv cuab zoo li qub ntawm cov chav kawm sab nrauv. Txawm li cas los xij, cov chav kawm sab hauv yog khi toinstance thiab nws tuaj yeem nkag mus rau cov tswv cuab ntawm pawg enclosingclass
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