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Video: Lub tsev qiv ntawv ua haujlwm hauv Java yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Library Functions :- Cov no yog cov inbuilt kev ua haujlwm tam sim no nyob rau hauv Java Library cov chav kawm, muab los ntawm Java system los pab cov programmer ua lawv txoj haujlwm yooj yim dua. Lub tsev qiv ntawv Cov chav kawm yuav tsum suav nrog java ua program siv ib pob. Pob:-Packages yog sau ntawm cov chav kawm lossis subclasses.
Ua kom pom qhov no, lub tsev qiv ntawv ua haujlwm yog dab tsi?
Lub tsev qiv ntawv muaj nuj nqi hauv C lus yog inbuilt kev ua haujlwm uas yog pawg ua ke thiab muab tso rau hauv ib qho chaw hu ua tsev qiv ntawv . Txhua lub tsev qiv ntawv muaj nuj nqi hauv C ua haujlwm tshwj xeeb. Peb tuaj yeem siv cov no lub tsev qiv ntawv muaj nuj nqi kom tau txais cov ntawv tso tawm ua ntej es tsis txhob sau peb tus kheej cov lej kom tau txais cov txiaj ntsig.
Ib yam li ntawd, cov haujlwm hauv Java yog dab tsi? A muaj nuj nqi yog ib daim code uas hu ua lub npe. Nws tuaj yeem dhau cov ntaub ntawv los ua haujlwm ntawm (piv txwv li qhov tsis muaj) thiab tuaj yeem xaiv rov qab cov ntaub ntawv (tus nqi rov qab). Tag nrho cov ntaub ntawv uas raug xa mus rau a muaj nuj nqi yog dhau lawm. Ib txoj hauv kev yog ib qho ntawm cov cai uas raug hu los ntawm lub npe uas cuam tshuam nrog cov khoom.
Tsuas yog li ntawd, Library Java yog dab tsi?
A Java Library yog Java -virtual-machine-based bytecode uas encodes cov chav kawm hauv tsev qiv ntawv . Nquag, uas tsev qiv ntawv tau muab faib los ntawm "jar" cov ntaub ntawv (qhov tseem ceeb tsuas yog cov ntaub ntawv zip ntawm cov chav kawm) thiab, thaum nws raug xa mus rau hauv koj chav kawm muaj nyob rau hauv kev hu los ntawm lwm cov chav kawm (xws li los ntawm lwm yam tsev qiv ntawv ).
Cov txiaj ntsig ntawm Java chav tsev qiv ntawv yog dab tsi?
Cov tsev qiv ntawv thiab lub moj khaum muaj qhov zoo li no:
- Txo qhov loj ntawm koj cov ntaub ntawv hauv chav kawm (cov lej tuaj yeem muab rho tawm thiab txav mus rau lwm qhov uas nws tsis cuam tshuam rau leej twg).
- Cleaner API vim koj tsis tuaj yeem xau sab hauv teb.
- Koj tuaj yeem sim koj lub tsev qiv ntawv ywj pheej ntawm koj daim ntawv thov.
- Koj tuaj yeem rov siv lub tsev qiv ntawv hauv ntau qhov haujlwm.
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