Video: Chav kawm kawg txhais li cas hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A chav kawm kawg tsuas yog ib chav kawm uas ua tau 'tsis raug ncua. (Nws ua tsis yog txhais tau tias uas tag nrho cov references rau cov khoom ntawm lub chav kawm yuav ua raws li lawv tau tshaj tawm tias kawg .) Thaum nws muaj txiaj ntsig los tshaj tawm a chav kawm raws li kawg muaj nyob rau hauv cov lus teb ntawm lo lus nug no: Cov laj thawj zoo txwv tsis pub muaj cuab yeej cuab tam hauv Java ?
Ntxiv mus, dab tsi yog chav kawm kawg hauv Java nrog piv txwv?
A chav kawm kawg tsis tuaj yeem txuas ntxiv (kwv yees). Muaj ob txoj kev siv a chav kawm kawg : Ib qho yog twv yuav raug hu kom tsis txhob muaj qub txeeg qub teg, xws li cov chav kawm kawg tsis tuaj yeem txuas ntxiv. Rau piv txwv , tag nrho Wrapper Cov chav kawm zoo li Integer, Float thiab lwm yam.
Ib sab saum toj no, koj sau cov chav kawm kawg hauv Java li cas? Txhawm rau tsim cov chav kawm tsis hloov pauv hauv java, koj yuav tsum ua cov kauj ruam hauv qab no.
- Tshaj tawm cov chav kawm kawg kom nws tsis tuaj yeem txuas ntxiv.
- Ua kom txhua qhov chaw ntiag tug kom tsis pub nkag ncaj qha.
- Tsis txhob muab cov txheej txheem setter rau variables.
- Ua kom tag nrho cov kev hloov pauv tau kawg kom nws tus nqi tuaj yeem raug muab rau ib zaug xwb.
Ib yam li ntawd, vim li cas peb thiaj xav tau chav kawm kawg hauv Java?
Cov kawg modifier rau finalizing qhov kev siv ntawm chav kawm , method, and variables. Lub hom phiaj tseem ceeb ntawm kev siv a chav kawm raug tshaj tawm tias kawg yog tiv thaiv cov chav kawm los ntawm kev ua subclass. Yog ib chav kawm yog cim ua kawg tiam no chav kawm tau tau txais ib qho feature ntawm lub chav kawm kawg.
Dab tsi yog qhov khoom kawg hauv Java?
kawg txhais tau tias koj hloov tsis tau cov khoom siv taw tes rau lwm qhov kev siv lossis lwm yam khoom , tab sis koj tseem tuaj yeem hloov pauv nws lub xeev (siv cov txheej txheem setter xws li). Whereas immutable txhais tau tias cov cov khoom Tus nqi tiag tsis tuaj yeem hloov pauv, tab sis koj tuaj yeem hloov nws qhov kev siv rau lwm tus.
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