Video: Qhov twg ntshuam nqe lus yog siv nyob rau hauv ib tug Java program?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv Java , cov ntshuam nqe lus yog siv coj tej chav kawm los yog tag nrho tej pob khoom, mus rau hauv visibility. Sai li sai tau imported , a chav kawm tuaj yeem raug xa mus ncaj qha los ntawm kev siv nws lub npe nkaus xwb. Cov ntshuam nqe lus yog ib qho yooj yim rau programmer thiab tsis yog technically xav tau sau tiav Java program.
Tsis tas li ntawd, lub hom phiaj ntawm daim ntawv ntshuam hauv Java yog dab tsi?
ntshuam yog ib lo lus tseem ceeb. ntshuam lo lus tseem ceeb yog siv rau ntshuam built-in thiab cov neeg siv-txhais pob khoom rau hauv koj java ua source file kom koj chav kawm tuaj yeem xa mus rau a chav kawm uas yog nyob rau hauv lwm pob los ntawm ncaj qha siv nws lub npe. Siv tus cim '*' los tshaj tawm tag nrho cov chav kawm uas muaj nyob rau hauv pob.
Tsis tas li ntawd, puas yog Java program ib txwm yuav tsum suav nrog cov ntawv xa tawm? Tsis muaj ntshuam nqe lus xav tau ntxiv lawm (uas los ua ke yog tias koj xav tau siv ob chav kawm nrog tib lub npe hauv ib qho Java file), tab sis koj tso tag nrho txoj kev mus rau lub chav kawm , suav nrog pob hauv kev tshaj tawm / pib ntawm qhov hloov pauv. Nyob rau hauv txoj kev no, lawv tuaj yeem hais txog qhov twg hauv qhov chaws.
Java pob yog dab tsi thiab nws siv li cas?
Pob ntawv Hauv Java . Pob hauv Java yog ib tug mechanism los encapsulate ib pawg ntawm cov chav kawm, sub pob khoom thiab interfaces. Pob ntawv yog siv rau: Ua kev tshawb nrhiav / nrhiav thiab siv cov chav kawm, kev sib txuas, kev suav sau thiab cov lus piav qhia yooj yim dua. Muab kev tswj xyuas kev nkag: tiv thaiv thiab lub neej ntawd muaj pob qib nkag tswj.
Dab tsi yog ob hom ntshuam nqe lus hauv Java?
Ob hom "ntshuam " Nqe lus . Ntu no piav txog ob hom 'ntshuam ' nqe lus : Ib leeg Hom Ntshuam thiab On-Demand Hom Ntshuam . 4 qauv Java cov ntaub ntawv tau muab los kuaj ' ntshuam ' nqe lus.
Pom zoo:
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