Video: Dab tsi yog daim ntawv qhia ntshuam hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv Java , cov ntshuam nqe lus yog siv los nqa tej chav kawm lossis tag nrho cov pob khoom, rau hauv kev pom. Sai li sai tau imported , 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 tus programmer thiab tsis yog technically xav tau los sau kom tiav Java qhov kev pab cuam.
Nyob rau hauv no hais txog, dab tsi yog ob hom ntshuam nqe lus nyob rau 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.
Qhov thib ob, dab tsi yog static ntshuam nqe lus hauv Java? Static ntshuam yog ib tug feature qhia nyob rau hauv lub Java cov lus programming uas tso cai rau cov tswv cuab (cov teb thiab cov txheej txheem) uas tau ua nyob rau hauv lawv cov chav kawm ntim raws li pej xeem zoo li qub , siv rau hauv Java code yam tsis tau qhia cov chav kawm uas lub teb tau raug txhais.
Ib sab saum toj no, dab tsi yog ntshuam lo lus tseem ceeb hauv Java?
ntshuam yog a Java lo lus tseem ceeb . Nws tshaj tawm tias a Java chav kawm siv nyob rau hauv cov cai hauv qab no ntshuam nqe lus. Ib zaug ib Java chav kawm tau tshaj tawm, tom qab ntawd cov npe hauv chav kawm tuaj yeem siv rau hauv cov lej yam tsis tau qhia meej txog pob khoom hauv chav kawm. Siv tus cim '*' los tshaj tawm tag nrho cov chav kawm uas muaj nyob rau hauv pob.
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.
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