Lub npe chav kawm hauv Java yog dab tsi?
Lub npe chav kawm hauv Java yog dab tsi?

Video: Lub npe chav kawm hauv Java yog dab tsi?

Video: Lub npe chav kawm hauv Java yog dab tsi?
Video: Yog hmoov dab tsi - Gao Nou Kue ft. Mang Vang (Official Music Video) New song 2020 2024, Kaum ib hlis
Anonim

Java muab ib chav kawm nrog npe Class hauv java ua . lang pob. Piv txwv ntawm cov chav kawm sawv cev chav kawm thiab interfaces nyob rau hauv ib tug khiav Java daim ntawv thov. Cov txheej txheem hauv ib qho chav kawm hauv java ua uas rov zoo li qub chav kawm yam khoom tseem hu ua Hoobkas txoj kev.

Kuj paub, dab tsi yog chav kawm hauv Java?

Cov chav kawm thiab Objects hauv Java . Cov chav kawm thiab Objects yog cov ntsiab lus tseem ceeb ntawm Object Oriented Programming uas tig mus ncig lub neej tiag tiag. Chav kawm . A chav kawm yog ib tug neeg siv daim ntawv qhia los yog tus qauv los ntawm cov khoom uas raug tsim. Nws sawv cev rau cov txheej txheem lossis cov txheej txheem uas muaj rau txhua yam khoom ntawm ib qho

vim li cas cov chav kawm lub npe tib yam li filename hauv Java? Yog tsis muaj pej xeem chav kawm ces npe file tej zaum yuav txawv ntawm cov npe hauv Java . Yog muaj pej xeem chav kawm ces nws yog yuam kom cov npe file yog ib yam raws li pej xeem chav kawm . Muaj cov tib lub npe raws li npe yog li cas JVM yuav paub qhov twg chav kawm mus thauj khoom thiab qhov twg los nrhiav qhov chaw nkag (tus qauv tseem ceeb).

Yog li ntawd, Java lub npe yog dab tsi?

Hauv Java , Siv cov chav kawm ua ntej npe raws li Class los yog Variable npe tso cai. Txawm li cas los xij, Raws li Java Cov Lus Qhia Tshwj Xeeb (§ 3.9) cov cai yooj yim rau kev sau npe hauv Java yog tias koj tsis tuaj yeem siv lo lus tseem ceeb li npe ntawm chav kawm, npe ntawm ib tug variable los yog npe ntawm ib daim nplaub tshev siv rau pob.

Puas yog cov npe hauv chav kawm sau npe Java?

Cov chav kawm npe conventions In Java , cov npe feem ntau yuav tsum yog cov npe, nyob rau hauv lub npe- rooj plaub nrog thawj tsab ntawv ntawm txhua lo lus cais peev . e.g.

Pom zoo: